I know this has been asked Coach, and I'm sorry but one more time.
What is generally more effective in your opinion.
High Volume (lots of reps), or High Intensity (heavy, low reps)?
my opinion as fallowing:
for me, "High Intensity" means always try NO REST between sets, no matter using lightweight with high reps or heavy weight(low reps)
And TRAINING EVERY MUSCLE GROUP TWICE a week!
I do not believe that training every muscle once a week only, if you are a natty!!
It's obviously working for him, he's in his 50's but looks like he's 30 and has a better physique than 90% of us.