Science or Fad? "Functional", Sauna and Ice Bath, Maingaining

This is a snippet from the Boostcamp Podcast with Alex Bromley. We ask Alex whether these fitness trends are based on science or just a fad?
1. "Functional" fitness/strength/bodybuilding
2. Saunas and ice baths for gym recovery
3. Maingaining, does it work?
Alex Bromley @AlexanderBromley is a RUclips fitness educator with over 150,000 subscribers. He is a 18 year veteran in strength sports, having competed in over 50 Strongman contests and placing 5th at World's Strongest Man.
In the 90 minute podcast, we talk to Alex about his journey as a RUclips creator, the future of weight training, programming advice for new lifters, his thoughts on different programs, internal and external motivation for extreme winners, getting into "the zone", being a choke artist during competitions, and his takes on fads like functional training, saunas & ice baths, and maingaining.
You can find Alex's FREE training programs on the Boostcamp App:
- KONG: Savage Size in 12 Weeks
- 70s Powerlifter
- Bullmastiff
- Fullsterkur Strongman Program

[@TRoninYT]

Also with maingaining, everytime I see it explained it can be summed up as either 1) a recomp or 2) a slow/lean bulk, so why even make up a new term?