Exercise Library
Janda Sit Up
Developed by physiotherapist Vladimir Janda, this sit up has you actively dig your heels in and contract the hamstrings before curling up, which reflexively inhibits the hip flexors so the abs do more of the work. It's a good fix for lifters who feel sit ups mostly in their hips.
Primary muscle
Primary: Rectus abdominis Secondary: Hamstrings
Equipment
Bodyweight
Category
Abs
Track This Exercise in the App
Log your janda sit up sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.