Does anyone "in the know" here have recommendations as to how frequently someone should train for a side lever/human flag?
On a good day, I can hold one with the right hand high for 3-4s on stall bars, and maybe 1-2s with the left hand high. Now, I'm a big(ger) guy than most - 6'1", 220lbs - and this leaves me fried. If I do just a few sets of sub-maximal holds (one leg tucked) on each side in a workout, the next day, I won't be able to come anywhere close. In fact, after the flags, I can hardly hold a wall handstand without continually sinking in the shoulders. The nervous system fatigue is on par with maximal deadlifting.
Now, I think the flag is a pretty cool trick, and I'd like to work up to a 10s hold on each side and then get the 180 degree pulls, but, with the way it tires me out, I can't really train it enough to make much progress. So, any tips on how to move forward?