Jackknife Sit-Up
- Primary musclesAbs
- EquipmentBody Only
- LevelBeginner
- ForcePull
AtletIQ — a workout log: working weight, sets and reps for your goal and level.
Add it to a workout in the app-
01Starting position -
02Final position
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01Starting position -
02Final position
Muscles worked
Primary muscles
Track it in your workout log
Add "Jackknife Sit-Up" to a workout in the AtletIQ app: sets, reps and time are saved to your log.
- Sets, reps and time in your workout log
- Workout programs for your goal and level
- Progress for every exercise
How to do it
4 stepsLie flat on the floor (or exercise mat) on your back with your arms extended straight back behind your head and your legs extended also. This will be your starting position.
As you exhale, bend at the waist while simultaneously raising your legs and arms to meet in a jackknife position. Tip: The legs should be extended and lifted at approximately a 35–45 degree angle from the floor and the arms should be extended and parallel to your legs. The upper torso should be off the floor.
While inhaling, lower your arms and legs back to the starting position.
Repeat for the recommended amount of repetitions.
Variation: If you are really advanced you could use a medicine ball for added resistance.
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AtletIQ app
A workout log with working weight calculation: program, sets and progress on your phone.