I have heard on this forum that an l sit is easier to hold than a tuck planche. However, I can hold a tuck planche for 13 seconds, but can not hold an l sit with my hips back for a second. I have decent pike flexibility, as I can touch the floor with straight legs. Also, I have decent abdominal strength, as I can hold the arch body hold for 60 seconds, and do slow hanging tuck leg raises to my chest for reps. What is the problem here?