Exercise Library
Straight Leg Sit Up
Lying on your back with both legs extended flat and straight instead of bent, you curl your torso all the way up into a full sit up. Keeping the legs straight removes the hip-flexor assistance a bent-knee sit up gets, putting more demand directly on the abs.
Primary muscle
Primary: Rectus abdominis Secondary: Hip flexors
Equipment
Bodyweight
Category
Abs
Track This Exercise in the App
Log your straight leg sit up sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.