Not sure what category of lifestyle i fall into. TDEE question.

I'd set your activity level to sedentary (it's meant to be based on your job or equivalent lifestyle), log your cardio exercises, and eat half of those calories back. You could also use a MET multiplier to log your exercise calories -- vigorous walking (3 to 3.5 miles/hour) has an MET of 3. That formula is MET*weight in kg*percentage of an hour; as an example, 30 minutes of vigorous walking for me would be 3*104.3*.5=156.4. You can find MET tables and pounds-to-kilograms converters online.

Anyway, that all got a little more complex than I meant to, but the upshot is: set your activity level to sedentary, log cardio realistically but don't log weightlifting for calories, and eat back a reasonable percentage of your exercise calories in addition to your baseline calories. Good luck!

Use TDEE if you weight lift and set it manually. MFP doesn't use tdee.

Sounds like you are bragging. Very few people have good stats like you do.

TwinAxe1 wrote: »

Whoa, you got it wrong there, i am not bragging at all. I just want to be around 10% bf for summer and i am not sure if i can do it till July. Also i am not sure i am even 15% at the moment (I might be a bit higher) since i have no visible core muscles yet. I can't really figure out why i am so light, since i most surely have yet to lose a lot of BF%. Sorry if i wrote the post bad and it sounded like bragging. English is just not my primary language and i am just learned it in school.

10% body fat is extremely low and unhealthy.
edit: Oh lord, I thought you were a woman. I don't know enough about men's body fat percentages so ignore me!

TwinAxe1 wrote: »

Hello i am 5'8 (173cm), 145lbs (65kg) and 18 years old. I have some muscle on me and i think i am around 15% bf, but not sure about that. I am not sure with what to multiply my BMR. I am thinking of doing BMR . 1.55. I lift 6 times a week for around an hour doing 8 exercises with 3 sets each, resting around 45 seconds between sets sometimes less. I walk around an hour daily. Other than walking and lifting i am pretty sedentary tho. Is lifting 6 times a week and a daily 1hour walk enough for BMR x 1.55?
It says my TDEE is around 2500. So if i eat at 2k calories from Monday- Sunday will i burn fat. Or should i eat 2200 on lifting days and 1600-1700 on rest day?

1.55 is for moderate activity, and what you describe sounds like moderate activity. It might be right and might not, but it's a decent place to start and adjust after 3 weeks or so based on results.

If you are lifting heavy 45 seconds between sets sounds like too little--is this more circuit training/cardio focused lifting? If so, you might be better off going heavier (even if it burns fewer calories) if your goal is to build muscle.

There's a group here called Eat, Train, Progress that you might find helpful.

TwinAxe1 wrote: »

Well i lift as heavy as i can, but i am not really training for strength. I am training for hypertrophy. That's why i am only resting 30-45 seconds between sets. I am also do drop sets/negative reps on the last set for the extra intensity.

Who's recommending 30 seconds between sets for hypertrophy?