Recomp, weight training help and feedback
skyhowl
Posts: 206 Member
Hi, So finally after two years of only focusing on counting calories. I decided I want to build strength and to also improve my body composition. I am 174 cm and 62.5 kg and my body fat percentage is supposedly 21% (I used a machine at the gym to measure my bf%, I don't think it is very accurate tho. I don't trust it that much but It's more of a gauge of how well I am doing.) I am mainly focusing on strength training 3-4 days per week. I haven't increased my calories since I started 3 weeks ago. I was eating at 1500 calories before for slow weight loss to lose a couple of pounds more and I eat half of my exercise calories (using a step counter), so that leaves me with a total of 1600-1780 calories. The thing is, since I didn't increase my calories and I am strength training, I expected to see the weight on the scale go down but I am now around 63.5 kg "not a lot and I know that much increase is insignificant". I definitely see a physical change in some areas of my body (i.e. begin firmer).. However, I don't feel like my strength improved that much since starting.. I am still using the same weights (mostly). Any tips or comments on my diet would be helpful to make sure I am gaining strength. Also is it normal to notice some numbers increasing starting strength training even though I am eating the same calories I did before?.
Another issue which may be off-topic a bit but my issue with strength training as I noticed is that I have a big strength difference between my left and right side. I can barely do 5 bicep curls reps with a 3 kg dumbbell using my left arm but I can manage a 4 kg dumbbell fine with my right arm and I am sticking to smaller weights now as I don't want the difference to be even worse. But I haven't noticed being a strength difference in my left arm since I started.
Another issue which may be off-topic a bit but my issue with strength training as I noticed is that I have a big strength difference between my left and right side. I can barely do 5 bicep curls reps with a 3 kg dumbbell using my left arm but I can manage a 4 kg dumbbell fine with my right arm and I am sticking to smaller weights now as I don't want the difference to be even worse. But I haven't noticed being a strength difference in my left arm since I started.
1
Replies
-
Why would you expect to see your weight go down if you didn't change your calories?
Three weeks is nothing. People work for months and years on building strength and muscle mass. Recomp is a slow process by it's nature.
Are you working a specific training program?
It is typical to gain some water weight when you start a new exercise regimen, that would probably explain the slight increase.
Have you read the recomp sticky post?
https://community.myfitnesspal.com/en/discussion/10177803/recomposition-maintaining-weight-while-losing-fat/p13 -
First off I'm not an expert, this is just my experience through exercise and different training styles over the past 20 years. Everyone is different so take from these comments what works for you and discard the rest.
3 weeks is not a long time to see strength gain, give yourself more time and don't stress too much, trust the process, if you keep lifting, and keep pushing yourself you'll be amazed at how far you come in a few months.
You may need to bump up your calories while you weight train, are you starving all the time? if not you may be fine at the calories you're at, but if you're finding yourself ravenous your body may need more. For me I'll always eat higher when I'm training heavy weights compared to when I'm doing a more cardio focused plan. Another thing that could be affecting you is your macros, everyone has a different split that works best for them and you may need to play around with that. But because you're just starting out I wouldn't mess around with too much. If you're not starving every day your calories are probably ok. Keep training and see where you're at in a month, if you're not seeing the gains you want try increasing those calories.
Absolutely lift with the lower weight, if your left arm is weaker don't move up in weight until you can finish all your reps in your sets with both arms at a certain weight. You're 100% correct that you'll only increase the imbalance if you train your left arm at 3Kg and your right at 4Kg.
As for the weight gain, the scale becomes a bit of a challenge with strength training. You'll likely put on muscle which weighs more than fat (this won't be massive, but it will push your scale up over time). But the biggest thing I've noticed is how much water I retain after a lifting session. If I train legs on Wednesday and weigh myself Thursday it's nothing to see a 5lb increase from the water retention. By Saturday, after my legs are feeling less sore I'm back down the 5 lbs. Everyone is different, you may see more or less due to this but don't be discouraged. I've always found a good way to stay motivate is through measurements (waist, thighs, arms), or just looking at how my clothes fit. Find a pair of pants that are tight and try them on every week to see if you've lost any inches. Or just use a measuring tape. Don't let the scale be your only guide, track things like how many push-ups you can do, how many squats. Goals that aren't scale specific are a great way to stay motivated and see progress when the scale is staying the same or slowly moving up. Take pictures flexing and watch the difference you see in your arms over the coming months.
Nothing feels better than getting the first full push-up or squatting a new higher weight, keep showing up and getting your workouts in and you'll get there. Hope you find this helpful!2 -
Why would you expect to see your weight go down if you didn't change your calories?
Three weeks is nothing. People work for months and years on building strength and muscle mass. Recomp is a slow process by it's nature.
Are you working a specific training program?
It is typical to gain some water weight when you start a new exercise regimen, that would probably explain the slight increase.
Have you read the recomp sticky post?
https://community.myfitnesspal.com/en/discussion/10177803/recomposition-maintaining-weight-while-losing-fat/p1
Well I thought my weight go down because I am eating same calorie but I am increasing my activity level. I was doing no exercise what so ever before and even walking was very limited. I relied on counting calories to lose the +20 kg I lost over the past few years. I do spend an average of 120 minutes in the gym for the past 3 weeks and I walk to gym (overall it is an hour walk going and getting back from the gym) . I do some circuit training as well as separate strength training. I was still losing a bit of weight even without doing this (it was very slow).
I don't expect to see major changes in a short time in terms of physical appearance but because I know progressive overload is a major part of gaining strength and everyone recommend increasing weight every week.. So me being not able to increase weight because I lift until I fail (especially for my upper body) and I am not seeing a change with that. That is my main issue. I am just worried since people make it seem like the norm to lift higher weight every week.
I am doing an upper-body/lower-body split. For my lower body I always do some compound lifts like squats, deadlifts and hip thrusts. But I also do use machines to target specific muscle groups separately. I try to also do compound lifts for my upper body (although I am very weak in my upper body).
Thank you so much for the link. It really helped.0 -
I'd recommend you get on a program that is actually geared towards strength if that is your goal. As a novice lifter, you're doing too much and spending too much time in the gym. Your lifting program really shouldn't take more than 60 minutes. Doing too much inhibits recovery...lack of recovery equals spinning your wheels and not making progress or inefficient progress.
There are programs geared specifically to strength like Starting Strength and Stronglifts 5x5 which are both beginner programs that focus on low rep lifting which is where you're going to see more linear strength gains. Also, people who are adding weight every week are typically starting pretty low...way lower than failure (which you shouldn't be training to anyways).6 -
Why would you expect to see your weight go down if you didn't change your calories?
Three weeks is nothing. People work for months and years on building strength and muscle mass. Recomp is a slow process by it's nature.
Are you working a specific training program?
It is typical to gain some water weight when you start a new exercise regimen, that would probably explain the slight increase.
Have you read the recomp sticky post?
https://community.myfitnesspal.com/en/discussion/10177803/recomposition-maintaining-weight-while-losing-fat/p1
Well I thought my weight go down because I am eating same calorie but I am increasing my activity level. I was doing no exercise what so ever before and even walking was very limited. I relied on counting calories to lose the +20 kg I lost over the past few years. I do spend an average of 120 minutes in the gym for the past 3 weeks and I walk to gym (overall it is an hour walk going and getting back from the gym) . I do some circuit training as well as separate strength training. I was still losing a bit of weight even without doing this (it was very slow).
I don't expect to see major changes in a short time in terms of physical appearance but because I know progressive overload is a major part of gaining strength and everyone recommend increasing weight every week.. So me being not able to increase weight because I lift until I fail (especially for my upper body) and I am not seeing a change with that. That is my main issue. I am just worried since people make it seem like the norm to lift higher weight every week.
I am doing an upper-body/lower-body split. For my lower body I always do some compound lifts like squats, deadlifts and hip thrusts. But I also do use machines to target specific muscle groups separately. I try to also do compound lifts for my upper body (although I am very weak in my upper body).
Thank you so much for the link. It really helped.
It's possible your weight has gone down a tick or two and water retention is masking it on the scale.
How accurate is your food logging? Do you use a food scale for all solids, and double check that the database entries you're choosing have accurate calories? Strength training can for some people spike appetite a bit more than cardio, and if you are eyeballing servings it's possible you are subconsciously eating a smidge more. (Honestly I do that whenever I wander away from the food scale, no matter my workouts ).
And strength training doesn't really burn all that many calories. If that's the only differences, you might be talking about a deficit of 100 cals or so a day, which will mean seeing weight loss month to month, not week to week.
I don't think it's typical to go up in weight on every lift every week, so I wouldn't worry too much about that.
I really think your only problem might be patience. If after a couple of months you still feel stuck, try working a designed program and see if it helps move you forward, some ideas here:
https://community.myfitnesspal.com/en/discussion/10332083/which-lifting-program-is-the-best-for-you/p1
Hang in there!2 -
First off I'm not an expert, this is just my experience through exercise and different training styles over the past 20 years. Everyone is different so take from these comments what works for you and discard the rest.
3 weeks is not a long time to see strength gain, give yourself more time and don't stress too much, trust the process, if you keep lifting, and keep pushing yourself you'll be amazed at how far you come in a few months.
You may need to bump up your calories while you weight train, are you starving all the time? if not you may be fine at the calories you're at, but if you're finding yourself ravenous your body may need more. For me I'll always eat higher when I'm training heavy weights compared to when I'm doing a more cardio focused plan. Another thing that could be affecting you is your macros, everyone has a different split that works best for them and you may need to play around with that. But because you're just starting out I wouldn't mess around with too much. If you're not starving every day your calories are probably ok. Keep training and see where you're at in a month, if you're not seeing the gains you want try increasing those calories.
Absolutely lift with the lower weight, if your left arm is weaker don't move up in weight until you can finish all your reps in your sets with both arms at a certain weight. You're 100% correct that you'll only increase the imbalance if you train your left arm at 3Kg and your right at 4Kg.
As for the weight gain, the scale becomes a bit of a challenge with strength training. You'll likely put on muscle which weighs more than fat (this won't be massive, but it will push your scale up over time). But the biggest thing I've noticed is how much water I retain after a lifting session. If I train legs on Wednesday and weigh myself Thursday it's nothing to see a 5lb increase from the water retention. By Saturday, after my legs are feeling less sore I'm back down the 5 lbs. Everyone is different, you may see more or less due to this but don't be discouraged. I've always found a good way to stay motivate is through measurements (waist, thighs, arms), or just looking at how my clothes fit. Find a pair of pants that are tight and try them on every week to see if you've lost any inches. Or just use a measuring tape. Don't let the scale be your only guide, track things like how many push-ups you can do, how many squats. Goals that aren't scale specific are a great way to stay motivated and see progress when the scale is staying the same or slowly moving up. Take pictures flexing and watch the difference you see in your arms over the coming months.
Nothing feels better than getting the first full push-up or squatting a new higher weight, keep showing up and getting your workouts in and you'll get there. Hope you find this helpful!
Wow, thank you so much for the detailed reply. This is helpful for sure.
As I mentioned replying to @kimny72, I am jusy worried about strength gain because people always stress that progressive overload is the way to go and that it is recommended to lift heavier every week/2 weeks and I am not there yet. But I guess I need to wait especially since I am not doing a normal cut/bulk cycle where strength gain would be more if I have more calories.
I think I am fine on a total of 1700 calories. I don't feel hunrgy that much to be honest. Maybe I will feel different later. My main issue is that I don't know how should I calculate my TDEE. I generally put that I am sedentary and calculate maintenance calories or cutting calories based on that. Then I add cslories from my step tracker and eat only half of those calories. My job is definitely an office job.. Should I maybe not eat the calories I get from my step tracker... I dunno exactly if people on recomp add calories from cardio or moving in general.
Yeah. I will continue to lift according to my left arm until I get it stronger... Thanks for confirming that.
I definitely feel verg excited about the idea of having other goals other than the scale. It was one of the reasons I finally decided to go to the gym even though It was just a thought for too long. I just wanted to feel better and gain strength as I know as I am getting older, I will start to lose strength unless I do something about it (I am 26 now) so the idea of having a healthy body as I grow older is my motivation.
0 -
warnongbri wrote: »Hello, I think we're in a similar stage and I think I can address all your points. (Body Fat% accuracy, Calories, Body change and Training).
I'm currently 6 weeks into a post detrained state/basically novice recomp and strength training program. So a similar boat. I have in those 6 weeks maintained my weight almost exactly within half a pound/less than half a kg but doubled my lifts in almost all the compound categories. My sources of study have been Lyle McDonald and copious youtube videos of Jeff Nippard/Vitruvian/Jeremy Ethier all students or graduates of some form of exercise science or other.
Things I did:
1. Any online TDEE calculator such as this one: https://tdeecalculator.net/ will give you a range of calories you need to consume to be at maintenance according to what your perceived exercise exertion is.
*Note: I picked light because it fit best with what I perceived to be my daily activity level. Also, I wanted to make sure I got the form down perfectly for some lifts and to slowly get used to the balance of working out and eating right. In the past, I had made the mistake of assuming 3 days to be moderate exercise and ate accordingly but ended up eating too much.
Your caloric intake sounds about right though - (don't take my word for it, use the link )
2. I designed my macros intake according to 3 basic principles
2.1 Kept my calories at maintenance on the Light exercise setting as per TDEE above, as far as I could on a weekly average and did not undereat - nor did I try to carb/calorie cycle or any such thing. Daily fluctuations will happen but I just adjusted the next day
2.2 Ate between 0.8 to 1g of Protein per POUND of bodyweight which in your case will be between 110 and 137 g. This is quite crucial especially since you're strength training
2.3 My NEAT (non-exercise activity thermogenesis) is pretty low as in outside of the gym the past 6 weeks have been relatively sedentary. So in that case, knowing my body metabolism is slower, I ate around 0.9 g of carbs per POUND (around 150g). The rest was fat. I cannot advise as to the carb intake because studies have shown carb intake ranges to be quite variable in successful trainees. That is something you'll have to experiment with.
3. My body fat percentage: Calculated it by
3.1 Using the NAVY seal method, it's simple only needing a tape measure http://fitness.bizcalcs.com/Calculator.asp?Calc=Body-Fat-Navy
It may or may not be accurate but what matters most is measuring it every week or two and in the same exact manner. The trend is what is important. If it gave 24% then went down to 23%, then fat has been lost even if a more accurate reading might have given 27%down to 26% or 21% down to 20%.
3.2 Did a google search for images of various body fat levels and ball parked what I looked like. Revisit every couple weeks.
*Note: My general philosophy has changed somewhat. If my body weight is staying the same when measured at the same exact time every day or two AND the weights I can lift are going up then over several weeks my body fat will be noticeably lower. But it may not be noticeable in a one or two week period. So basically I stopped the measurements and google image comparison.
4. Training and your 1kg increase: The 1kg increase could be just a daily fluctuation, I'd measure it daily at the same time for about a week and then see if its going up or not. In addition, it's not uncommon if you're detrained/novice to be at the same weight or even gain weight when doing a body recomposition. Plus you're noticing progress!
On Training: Since you mention bicep curls but also strength training, I'm curious to know what your program is.
This is what I learned and what has worked for me.
I do a program of Squats, Deadlifts, Bench Press, Overhead Press and a Bar Bell Row. When I wanted to do bicep curls, I used a barbell. The reason is that my entire body needed a strong base of muscle before any benefit from isolation exercises (Dumb bell) could accrue. I don't know if your dumb bell lifts were just a one time or part of your program but I would focus more on the heavy compound lifts for at least 2 months increasing the weight at best every single workout day or at worst every week. Progressive overload is the single most important thing in strength training.
Ok whew! I hope that helped.
That was a very good reply! Thanks for that.
1-regarding the TDEE, you mentioned that you chose light exercise. For my measurements, my TDEE with light exercise is about ~1940 calories. If I choose Sedentary, it's ~1700 calories. For the past few months, my average total calories is ~ 1700. (Not considering any workouts or walking calories etc.). So I guess I am still within my maintenance calories (If I never make mistakes or errors with counting my calories.)
2- The macros are a big issue for me. I am struggling with my protein intake. I've been mostly plant-based for a few years now (I still eat meat, sometimes.. maybe once or twice every month if I am invited to someone's place for food.). Before strength training, I was getting only an average of 30-40 g of protein everyday because even though there's some plant-based food with good protein. it's usually high in carbs as well and are very filling in general (lentils, beans..etc.). I also hate cooking and just would rather bake some potatoes in the oven or some vegan bean burgers and eat those without needing to do much preparation. I knew I had to up my protein intake if I am going to do strength training. I know protein powders are not essential but I decided it was one option for easy 20 g of protein. I can then get another from my just normal plant-based food which gets me to about ~70 g of protein. I wouldn't mind eating tuna every day but I worry about mercury levels.. I am still adjusting now but I am still barely getting to 80 g if I focus on getting some protein in every meal. And then there's another issue I noticed especially the past week.. I began having issues with digestion (without going into many details) even though I am getting the same amount of fibre I always had (almost a minimum of 25 g every day). I just feel very bloated and I don't know if it's the protein or something else. I am actually afraid now to eat even more protein because ever since I started being plant-based, I never had issues with digestion at all.. - The weight gain issue I have may be due to my digestion issue but I can't tell since it is still an ongoing problem-
3- I will use that method to get an estimate for my body fat. I tried to look for photos on google before but I honestly can't tell. I see myself as +25% bf. The trainer that did my bf % on the machine at the gym said he thinks I am even less than 21% from what he can see. But I guess maybe he was just being nice. . But it honestly doesn't matter that much as long as I am using the same equipment or method to track my progress. Thanks for those recommendations.
4- True, I am noticing progress and that weight gain might be due to other reasons. And the physical progress was definitely a surprise since I didn't expect to see changes for a few months.
5- I do compound lifts. I was initially going to do the 5x5 lifting program as I know it is a good start to build strength. But my issue is that two of the upper body exercises (barbell press and overhead press) are a bit scary to me. The lowest fixed barbell at my gym is 10 kg. I can't imagine lifting a 10 kg barbell over my head without breaking my neck. I am planning to get personal trainer sessions at my gym to just help with some of these exercises that are a bit scary for me to do initially on my own. But, for now, I do maybe the same moves with dumbbells as I can go as low as 1 kg on each arm. But as I mentioned in a previous reply, I spend a lot of time at the gym.. (which is something I should probably change according to people's recommendation), so I do compound lifts for sure but I also do other lifts to train different muscle groups separately.0 -
cwolfman13 wrote: »I'd recommend you get on a program that is actually geared towards strength if that is your goal. As a novice lifter, you're doing too much and spending too much time in the gym. Your lifting program really shouldn't take more than 60 minutes. Doing too much inhibits recovery...lack of recovery equals spinning your wheels and not making progress or inefficient progress.
There are programs geared specifically to strength like Starting Strength and Stronglifts 5x5 which are both beginner programs that focus on low rep lifting which is where you're going to see more linear strength gains. Also, people who are adding weight every week are typically starting pretty low...way lower than failure (which you shouldn't be training to anyways).
I was initially just going to focus on 5x5 lifts but I get very confused as there's too much information out there.. it almost gets overwhelming to stick to one program especially if you have specific physical goals. For example, I want to be able to gain upper body strength to do full pull-ups and I see the assisted pull up machine at the gym and I think I need to use this to get better because the idea of making progress for that kind of goal of doing a pull up is very exciting for me. Also, some people recommend at least 2 exercises for each muscle group and some recommend focusing on full-body programme. I just get very confused. I was mainly following the recommendation from this page: https://www.aworkoutroutine.com/upper-lower-split/#2 for a 4/3 day upperbody/lowerbody split. But as you said, I am just making my workouts more complicated than they should especially since I am just starting. I will try to do only a 5x5 for my next gym session.
0 -
warnongbri wrote: »That was a very good reply! Thanks for that.
1-regarding the TDEE, you mentioned that you chose light exercise. For my measurements, my TDEE with light exercise is about ~1940 calories. If I choose Sedentary, it's ~1700 calories. For the past few months, my average total calories is ~ 1700. (Not considering any workouts or walking calories etc.). So I guess I am still within my maintenance calories (If I never make mistakes or errors with counting my calories.)
2- The macros are a big issue for me. I am struggling with my protein intake. I've been mostly plant-based for a few years now (I still eat meat, sometimes.. maybe once or twice every month if I am invited to someone's place for food.). Before strength training, I was getting only an average of 30-40 g of protein everyday because even though there's some plant-based food with good protein. it's usually high in carbs as well and are very filling in general (lentils, beans..etc.). I also hate cooking and just would rather bake some potatoes in the oven or some vegan bean burgers and eat those without needing to do much preparation. I knew I had to up my protein intake if I am going to do strength training. I know protein powders are not essential but I decided it was one option for easy 20 g of protein. I can then get another from my just normal plant-based food which gets me to about ~70 g of protein. I wouldn't mind eating tuna every day but I worry about mercury levels.. I am still adjusting now but I am still barely getting to 80 g if I focus on getting some protein in every meal. And then there's another issue I noticed especially the past week.. I began having issues with digestion (without going into many details) even though I am getting the same amount of fibre I always had (almost a minimum of 25 g every day). I just feel very bloated and I don't know if it's the protein or something else. I am actually afraid now to eat even more protein because ever since I started being plant-based, I never had issues with digestion at all.. - The weight gain issue I have may be due to my digestion issue but I can't tell since it is still an ongoing problem-
3- I will use that method to get an estimate for my body fat. I tried to look for photos on google before but I honestly can't tell. I see myself as +25% bf. The trainer that did my bf % on the machine at the gym said he thinks I am even less than 21% from what he can see. But I guess maybe he was just being nice. . But it honestly doesn't matter that much as long as I am using the same equipment or method to track my progress. Thanks for those recommendations.
4- True, I am noticing progress and that weight gain might be due to other reasons. And the physical progress was definitely a surprise since I didn't expect to see changes for a few months.
5- I do compound lifts. I was initially going to do the 5x5 lifting program as I know it is a good start to build strength. But my issue is that two of the upper body exercises (barbell press and overhead press) are a bit scary to me. The lowest fixed barbell at my gym is 10 kg. I can't imagine lifting a 10 kg barbell over my head without breaking my neck. I am planning to get personal trainer sessions at my gym to just help with some of these exercises that are a bit scary for me to do initially on my own. But, for now, I do maybe the same moves with dumbbells as I can go as low as 1 kg on each arm. But as I mentioned in a previous reply, I spend a lot of time at the gym.. (which is something I should probably change according to people's recommendation), so I do compound lifts for sure but I also do other lifts to train different muscle groups separately.
No Problem! Glad to have helped.
1. Sounds good. 1700 for a while more then
2. What I can offer are two of my favourite vegan fitness/bodybuilding youtubers; they are also husband and wife: check out Kathrine Moen and Jon Venus. They offer TONS of ideas on hitting protein goals on a vegan/plant based lifestyle.
For bloating, some protein powders might do that. You'll have to experiment. Also it's not essential to get whey protein necessarily which has more lactose. Try a Whey Isolate or another variant entirely.
Have other variables been the same when your protein intake went up? Try increasing for instance Tofu and decrease the powder. You'll get some additional carbs but maybe isolate the powder as being the issue.
3. Yup. Use other methods to track progress (scale weight and lifting weight)
4. All hail body recomp! haha
On the training program; getting a personal trainer might be a very good idea!! Just to get the form right and the fear of making a mistake kinda thing.
5x5 is the best program for its simplicity that I've come across for a beginner. That's the program I currently am on as well. In the time being, maybe you could substitute the barbell for dumbbells on the overhead and bench until you get a trainer. The point of 5x5 isn't using the barbell but more (a) learning proper form and (b) increasing the weights on every workout.
Ultimately find one routine that makes sense for you that has progressive overload i.e some increase in weights being lifted every single workout. It doesn't HAVE to be 5x5.
Look up Robin Gallant; she has some good stuff for compound full body without barbells.
Good luck! Just keeping increasing the weights and don't do too much isolation stuff!
Thanks for all those tips. I definitely feel like it is indeed the protein powder. I stopped taking it for a few days and I just started to feel way better yesterday. I will be either switching to a Vegan protein powder or try a Whey Isolate.
Good luck with your lifting as well.0
This discussion has been closed.
Categories
- All Categories
- 1.4M Health, Wellness and Goals
- 393.7K Introduce Yourself
- 43.8K Getting Started
- 260.3K Health and Weight Loss
- 176K Food and Nutrition
- 47.5K Recipes
- 232.6K Fitness and Exercise
- 431 Sleep, Mindfulness and Overall Wellness
- 6.5K Goal: Maintaining Weight
- 8.6K Goal: Gaining Weight and Body Building
- 153K Motivation and Support
- 8.1K Challenges
- 1.3K Debate Club
- 96.4K Chit-Chat
- 2.5K Fun and Games
- 3.8K MyFitnessPal Information
- 23 News and Announcements
- 1.2K Feature Suggestions and Ideas
- 2.6K MyFitnessPal Tech Support Questions