This exercise really surprised me, as I can hold an "L-sit" palms on the floor for 30 seconds (with greater compression but my hips behind my shoulders). The hard part is keeping a straight back perpendicular to the ground, which involves pressing the hips forward. Hello rear deltoids, and if I don't focus on contracting my triceps, I bend my elbows. Any tips on the shoulders beyond scapular depression? Neutral regarding protraction/retraction? Open shoulders?
Should I focus on pressing the hips forward more and holding for less time?
Thanks!