They’re at about the 16:15 mark in this video. It’s worth watching the whole thing if you’ve got the time… I learnt a lot that I didn’t know about how to exercise correctly. I always managed to hurt my back doing sit-ups and didn’t know why. I’m not strong enough to do the first one (basic planking) without arching or sagging but the other ones he does are the ones I’ve been doing. They seem easy but do enough of them and you’ll feel it where it counts.
They’re at about the 16:15 mark in this video. It’s worth watching the whole thing if you’ve got the time… I learnt a lot that I didn’t know about how to exercise correctly. I always managed to hurt my back doing sit-ups and didn’t know why. I’m not strong enough to do the first one (basic planking) without arching or sagging but the other ones he does are the ones I’ve been doing. They seem easy but do enough of them and you’ll feel it where it counts.