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Sitting Knee Tuck on a Chair

Step by step instructions, muscle activation and variants for the Sitting Knee Tuck on a Chair.

EasyAbsCore

About this exercise

A seated core exercise that targets the abs and hip flexors by drawing the knees toward the chest while stabilizing with the arms. It is an accessible bodyweight movement suitable for beginners or as a warm-up for more demanding core work.

How to Perform

  • Sit on the edge of a sturdy chair and grip the sides of the seat firmly with both hands
  • Lean back slightly and lift your feet off the floor with legs extended in front of you
  • Draw your knees toward your chest by contracting your abs
  • Pause briefly at the top, then slowly lower your legs back to the starting position
  • Keep your core braced throughout and avoid using momentum

Muscle Activation

Primary
AbsCore
Secondary
QuadricepsObliques

About the Sitting Knee Tuck on a Chair

The Sitting Knee Tuck on a Chair is a foundational movement that builds strength and muscle through controlled, progressive overload. Train it 1 to 2 times per week with 3 to 5 working sets per session, gradually adding weight or reps as form holds up.