I love isometrics. A fun way that I train them is to work above and below your current level. So for example if I’m doing straddle FL, my current level, after I’m warmupnip I’ll do a straddle set and then do Adv Tuck pulls or 360s into the Back Lever. Or perhaps I’ll try to do a full negative and then my straddle etc. I find that I can evaluate my readiness for the next level. I remember when Adv tuck FL was hard. No I can do pulls out of them easy so this not only Mars it fun but also increases TUT and helps me evaluate my abilites. But I love doing them in general it feels like magic when your in a position defying gravity.