Sit-Up (TRX / Suspension Trainer)

Level
beginner
Force
push
Mechanic
isolation
Equipment
trx
Category
strength
Primary Muscles
Secondary Muscles

A core exercise where the body is partially suspended in TRX straps while performing a sit-up motion, reducing strain on the hip flexors while building abdominal strength.

Instructions

  1. Sit facing the anchor point with feet under the anchor and knees bent
  2. Grip the TRX handles and lean back slightly to create tension
  3. Use your abdominals to sit up, bringing your chest toward your thighs
  4. Keep your core engaged throughout the movement
  5. Return to the starting position with control
  6. Complete prescribed reps maintaining tension in the straps
  7. Avoid using excessive arm pull to perform the movement

Tips

  • Focus on core strength and abdominal activation
  • The TRX reduces the strain on hip flexors compared to traditional sit-ups
  • Keep tension in the straps throughout the movement
  • Control the descent rather than using momentum
  • The angle of lean determines difficulty; more lean equals harder
  • This exercise builds core strength safely

Recommended starting values

Sensible novice starting points for each goal, for a lifter aged 25–40. Scale down for smaller frames or older lifters. Treat the first set of any session as a discovery set.

Goal Sets Reps
Gain strength 3 15 reps
Build muscle 3 18 reps
Build endurance 3 25 reps

Alternatives

Exercises that target the same muscles with the same force and mechanic.

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Resisted Sit-Up (TRX / Suspension Trainer)

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