I hope I will not come across as harsh or ignorant, I know how you train and your experience and love the information you kindly share w us.
The video just boiled my blood a bit…. Maybe on top of what life serves me today
Honestly, him talking about his training program as with a frequency of one session in two weeks as high intensity to preserve/build muscle, and not mentioning or not knowing about Mike Mentzer who is the person who either invented this method or at least made it popular, decreases my trust to this person in the video.
I can only talk about personal experience, as a person who trained w HIT (not HIIT) principals for 6 months mostly with resistance bands/calisthenics etc with great muscle building success. Who then discovered push pull legs split and followed a calisthenics hyperthropy program and then started to practice daily and by using SF principals to gain strength,, the positive impact of high frequency strength training is day and night for me.
With HIT you can gain muscle, and that muscle might even be more than you gain through daily strength practice (I can’t say for sure) but I would pick the positive impacts of SF principals over HIT anytime.
And it is quite hard for me that HIT protocol would create similar or better longevity results than daily movement, training, exercise, practice whatever you name it
Ps: Did not watch the entire video, jumped in to his routine that he talks about basically HIT.
One other aspect for me that decreases his credibility is him talking about muscles (when I skip the video titles) this indicates me he can be an advocate of machines, isolation exercises etc. There in my opinion could be no real life scenario that those modalities would be better than moving your own body with or without external resistance for anything health or longevity or life quality.
Looking forward to hearing opposing ideas and corrections to learn from.