what are some exercises you incorporate into your workouts that many people don't do? Or exerices you feel work well but not many people preform them

Unless your prepping for a competition or suffer from lactose intolerance, what are the real differences between whey protein concentrate and isolate, and what would make you use one over the other?

How many hours of sleep do you believe is optimal per night for muscle recovery? Also do you believe in taking supplements to help with sleep such as ZMA or Melatonin? 

You always hear the idea that you should eat every 3 hours, including protein. What are your thoughts on the eating every 3 hours philosophy? It is completely necessary to do this? OR does it really just boil down to your macro numbers at the end of the day? 

I know Mike Rashid is only eating once a day at the moment, and that sparked my interest for this question.

Hi Marc! I have been taking pre-workout supplements 4-5 days a week for the past several years. I never felt the need to take a stimulant break, as my body still responds nicely to caffeine, DMHA, DMAA, etc. Is there a rule of thumb you use to taper off of stimulants? If so, how long do you recommend taking a stimulant break for? 

Hey Marc, now that Machine Sleep aid is out how much longer will it be for the "Cookie Cake" and what will the nutritional values look like?

Hey Marc, I was planning on getting Nutrient Driver and I was wondering 1. How long do the effects of this pill last 2. When do you normally take it as in before breakfast lunch or dinner and 3. I take one scoop of Carb 10 before training around 1 PM, should I take it then and will it last the remainder of the day

Hey Marc, So Arnold and all of these other bodybuilders go on and on about doing the suction or vacuum stomach as a core workout but in your opinion would getting in a plank position and then doing the vacuum maneuver be more effective because you rely on your core more in the plank position rather than standing up and doing the vacuum. Thanks!!

Hey Marc, Emilio from Spain here. I want to know what should I eat pre-workout, I usually take fast digesting carbs and some protein depending on how my macros for the day are. On the other hand there are some people that say I should take slow-digesting carbs like brown rice and Im kind of lost and need your help thank you. Also, I heard that you want to take fats and protein at breakfast and on your last meal and carbs and protein during the day; what's your take on this?? Thanks Marc

:)

Hey Marc, what is your opinion on machines vs free weights? Do feel one can make gains just as much or as quickly using only machines. Or are free weights essential to working out and building muscle?