Just wanted to get everyone's opinion on TUT, Time Under Tension. I do believe it works however I like lifting at higher volume so I may be a little biased. the theory is you lift until the 40-70 seconds range. Another aspect not mentioned in the video is that the lifts should be completed 4 second descend then 2 second ascend. Basically by the 6th rep is when your body starts producing gh and other hormones naturally. I suggested it to be used even while on gear. but at the end of this video he says it is unnecessary for people on gear because they're already getting those hormones synthetically.
TUT has been in studies that show it is effective however no absolute proof that it works better than any other type of workout.