I agree with Robb for the most part. Dude is doing those squats with 50 kg (110 lb). Lame. Watch any O-lifter and the typical squat will have a rapid eccentric component, but with real loads (I was watching junior Colin Ito squat 210 kg or so for 10 sets of triples last week).
The BOSU thing looks more like party trick, although I can see the benefits since it's rare to see that horizontal upper body eccentric absorption. BOSUs just rub me the wrong way, however.
The sit-up and glute-ham things are interesting I guess, but not exactly revolutionary or unique in terms of stimulus.
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