Hi
I've been doing the stretch series for couple of years and I really like them.
Couple of days ago I came across this video "3 Ways You Should NEVER EVER Stretch Your Hamstrings".
In the video they highlight Standing Pike and Hurdler Block (which is part of the Front Split series) as bad stretches that can put a lot of stress on the lower back. This got me confused. Is there any justification behind those claims?
Thanks in advance.