I am doing a modified version of the SL/PE1. Arms towards my feet but trying to keep the shoulders retracted. Knees bent to 90 degrees. With this form I can do a reasonable 5*36s.
I now try to do 4*48s and towards the end of most of the sets I start to loose form, mostly by the legs coming down. There is really nothing I can do about it, it's like I loose control over them.
Question, should I keep doing 4*48s (i finish the sets but with poor form) or should I stop when I loose form? I still feel that it will get me stronger or am I wrong?