3/4 Sit-Up
A bodyweight abdominal exercise that uses a partial sit-up range rather than a full transition to sitting. It targets the abdominal muscles through a controlled trunk-flexion variation.
- Body part
- Abs: all exercises
- Movement
- Core: all exercises
- Equipment
- Bodyweight: all exercises
What it trains
- Lower Abs, Primary, 85%
- Upper Abs, Primary, 85%
- Iliopsoas, Secondary, 50%
- Erector Spinae, Stabilizer, 25%
How to perform
Lie on your back with knees bent and feet planted. Place the hands lightly by the temples or across the chest.
Brace the abdomen and curl the torso upward through roughly three quarters of a full sit-up without pulling on the neck.
Lower slowly to the start position and keep the feet and pelvis controlled throughout the repetition.
Tips
Keep the movement smooth and controlled; exhale as the torso curls upward.
Use a comfortable hand position and keep the chin relaxed to avoid pulling through the neck.
Common mistakes
Pulling the head forward with the hands instead of moving through the abdominals.
Using momentum or rising into a full sit-up instead of stopping at the controlled three-quarter position.
Related exercises
Variations · 1
Sit Up
Partial-range sit-up with a controlled three-quarter amplitude, distinct from the generic full sit-up.
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