Single leg stretch is an intermediate mat pilates exercise.
This exercise develops abdominal strength and you are stabilising your abdominal muscles in isometric contraction and holding trunk and pelvis absolutely still as the legs perform the movement.
Muscle focus :
Abdominal muscles
Objectives :
to strengthen abdominal muscles
to develop pelvic- lumbar stability
Reference : Serap Erbas
To reach Serap on you tube channel the link is below;
https://www.youtube.com/channel/UCrCF--SqjEnuXyA13Rmlx0Q