My trainer wants me to lose 79lbs in a year

You can do it! I lost 49lbs in 4 1/2 months close to 5 months but with good diet and exercise you should not fail in the long run. I say long run because you ARE going to have the days where your food was way over calories or didn't exercise for days.. but guess if we never fail we will never know the great part about getting back into it. I love that I like different foods now then before, I like that can actually work out and not be so tempted to quit after 20 minutes. Get your mind right with positive people and things. Good Luck!

When losing a lot a weight in one year, you should definitely consult your doctors as well. Losing a lot of weight fast can put strain on your heart causing a lot of issues, mainly heart diseases and failures. Thats why its better to lose weight at no more than 2 pds a week. You can definitely do it with a lot of will power, I would just say make sure your doing it in a healthy way

Huh?!?

Very attainable. 1.5 pound loss per week for one year = 78 pounds.

I've been at this since March with a goal of 1.5 loss per week. Some weeks I don't quite get there, some weeks I drop 2.

When I average it out over the last 29 weeks, I'm a bit ahead of my goal.

If you want it, it can be done, and done safely. Good luck!

It can be done for sure and in a healthy way. I started out changing my eating habits and exercising three days a week for 7 months after December 2013. I weighed in at 305 on the 28th of December and I am now as of today 247.6 lbs. That is a 57.4 lb loss in 10 months. I am shooting for 230 to 220 by Christmas which is possible and solid with muscles. I lost 30 lbs in 7 months with normal exercise and since July when I got strict on my eating and exercise I have lost 24.4 lbs as of this morning.

Dont think of this as a diet which can lead most to fail. Look at this as a lifestyle change where you are eating better than you did before and moving a lot more to experience life and being outside. My eating habits also range from 1800 to 2500 calories a day which my BMR is 2000 and my TDEE is 2900. It will take discipline at first and then it will become second nature after a while of doing it. You got this and can succeed at it and achieve all your goals. Drive forward and enjoy life doing it.

Edit: Here is my statistics for the last 7 months..

It can definitely be done! Why not at least try? If you don't quite reach your goal, it's not the end of the world. Say you end up losing only 50 pounds in a year. That's still 50 freaking pounds! That's going to make a huge difference!

There's no harm in trying. Don't beat yourself up if you don't quite make it, but also know that you CAN do it. The most important thing is that you're working on being healthier and that's awesome.

It is possible to lose that much in a year. But weight loss is only one measurement to gauge your success. Rather than fix on a specific, arbitrary number based on a generic mathematical formula, consider also tracking your progress in terms of, for example: change in percentage of body fat; change in linear measurements (bust, waist, hips, etc.); change in clothing sizes (perhaps being able to fit into clothing which was previously too tight); improvements in strength and cardiovasular conditioning; control of appetite (satiety) and blood sugar levels (a BIG plus on low carb diets); variety and livability (working your diet to its best advantage).

You can do it!