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Half Sit-Up (Male)

A partial-range sit-up that stops about halfway up, keeping constant tension on the abs while sparing the hip flexors and lower back.

AbsBodyweightTrunk flexion
GoLightWeight mediahalf-sit-up-male

Demonstration coming soon

Primary

Rectus abdominis

Secondary

ObliquesHip flexors

Equipment

Bodyweight

Pattern

Trunk flexion

Setup

  1. 01Lie on your back with knees bent about 90 degrees and feet flat.
  2. 02Place the arms straight at your sides or hands on the thighs.
  3. 03Tuck the chin slightly and set the ribs down.
  4. 04Brace lightly so the lower back stays quiet.

Execution

  1. 01Exhale and curl the head, shoulders, and upper back off the floor.
  2. 02Rise until the torso is about 45 degrees, roughly halfway to upright.
  3. 03Hold the halfway point for a moment with the abs contracted.
  4. 04Lower slowly until the shoulder blades touch the mat, then repeat.

Checkpoints

  • -The stopping point stays consistent rep to rep, around 45 degrees.
  • -Hands slide along the thighs as a range gauge if used.
  • -The lower back never fully leaves the floor.
  • -No bouncing off the mat between reps.

Common mistakes

  • -Creeping into a full sit-up as fatigue builds.
  • -Pulling with the neck instead of curling the trunk.
  • -Anchoring the feet and letting the hip flexors dominate.
  • -Dropping the torso instead of lowering under control.

Programming notes

  • -Use 2 to 4 sets of 12 to 20 reps for direct ab work.
  • -Add a 2 to 3 second isometric hold at the halfway point to increase difficulty.
  • -A good regression target when full sit-ups aggravate the lower back.

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