How do you feel about BCAAs and when do you think they should be taken, Thank you Marc!

I had a personal training class this past semester at school where time under tension was the main focus. My professor, a former strength and conditioning coach said that time under tension is best way to promote muscle growth. I was curious as to whether or not time under tension is as important as he and many others seem to claim.

what is your preferred exercises to train your abs? Also how  frequent should you train your abs? Lastly if your at a low body fat (sub 8%) and have a good 6 pack, do you think it's better to focus on other lagging body parts rather than spend more time on training your abs if you are pressed for time? 

What's your opinion on training muscles more than once per week? Can this be effective for bringing up lagging body parts? Do you think this can potentially lead to overtraining?

I've been taking your carb 10 for a month now and it has been working great and i'm going to start taking machine fuel intra-workout but for me who's someone trying to build muscle and burn fat simultaneously would it be better to drink them before my workout so I can use the carbs during my workout?

Hi Marc I am 50 years old and I have never been that active. I am overweight and I want to get in better shape so I can live a longer life and be able to do physical things humans were meant to do. I have a desk job and work 50-55 hours a week. I want to join a gym but I don't know how to workout. Or how to start... I don't want to be one of those people, who just goes to the gym and walks on the treadmill for hours. Any advice you could give me would be much appreciated 

can short or long terms dieting cause a significant suppression of testosterone? Currently 21 years old 6 foot 2 male and have been long term dieting for my job (actor/ model). I suffer from low test and thyroid. Curious on your thoughts on this? Also I'm on exogenous TRT and thyroid replacement, but doctor wants me off testosterone once I gain more weight and check bloods. I asked if a pct would be needed to increase my lh and natural test and he said no. Your thoughts? Thanks!

hey Marc!  So I joined a gym and I'm looking into getting a personal trainer. Because I have no clue how to workout. My question is.. i have heard a lot about how some personal trainers just give their clients some cookie cutter programs that make some end up getting me hurt or end up hating training. Do you have any tips you could give me on what I should look for in a trainer? Or how to tell if they actually know what there doing?

Would apple cider vinegar, a multivitamin, and whey protein combined with rigorous workout sessions of cardio four to five times a week for half an hour shed that last stubborn layer of belly fat in a few weeks to a month?

I have a younger sister who is getting to the point with her weight gain, that loose skin will be an issue if she decides to ever loose the weight. I've kept it to myself but don't want to see her go past this point of no return if that makes sense. How would you recommend approaching close family members who are headed down an unhealthy path. Or do you?