Janda Sit Up

1. Lie on your back with the knees bent to about 90 degrees and the feet flat on the floor, hip width apart.
2. Cross the arms over the chest or hold them straight out in front of you.
3. Dig the heels into the floor and drag them back toward the glutes without letting them actually move.
4. Keep that hamstring tension and exhale as you curl the chin, then chest, then torso off the floor.
5. Rise only as far as you can without the hip flexors taking over, often just past the shoulder blades.
6. Lower slowly over three to four seconds while still pulling the heels back, then repeat.

Common Mistakes

• Losing the heel pull: The hamstrings relax halfway up and the hip flexors take over. Keep dragging the heels back for the entire rep, up and down.
• Anchoring the feet: Having a partner hold the feet defeats the purpose of the exercise. The feet should press down and back freely on the floor.
• Rushing the descent: Dropping back fast skips the part where the abs work hardest. Take at least three seconds to lower.

Programming Tips

Use the Janda sit up as a direct ab exercise at the end of a session or as a teaching drill before loaded trunk work. Do 3 to 4 sets of 6 to 12 reps with a slow descent. It is harder than it looks, so expect a lower rep count than a normal sit up, and treat it as a quality movement rather than a volume builder.

Set up on a mat with the knees bent, heels pressing down and back, and start with bodyweight and a partial range, often only reaching the shoulder blades. Progress by rising higher while keeping the hamstring pull, extending the descent to five seconds, or holding a 2.5 to 5 kg plate on the chest. The most common fault is the heel pull fading as the torso rises, which you fix by stopping the rep at the point where the hips begin to take over.

Common Questions

What does the Janda sit up work?

It works the rectus abdominis and obliques while the hamstrings contract to reduce hip flexor involvement. The result is a sit up that is felt almost entirely in the abs.

Does the Janda sit up really switch off the hip flexors?

It reduces their contribution rather than eliminating it, through reciprocal inhibition from the contracting hamstrings. Most lifters notice far less hip pull and a much harder ab contraction.

Why can I not do a full Janda sit up?

Without the hip flexors helping, a full sit up needs strong abs and the right lever lengths, so many people cannot finish the range at first. A partial rise to the shoulder blades still delivers the benefit.

Janda sit up versus regular sit up, which is better for abs?

The Janda version isolates the abs better and is kinder to the hip flexors and lower back. The regular sit up allows more reps and load, so it is better for general trunk strength.