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Seated 8 Leg Crunch with Chair

Step by step instructions, muscle activation and variants for the Seated 8 Leg Crunch with Chair.

EasyAbsCore

About this exercise

A seated ab exercise performed on a chair where the elevated legs trace a figure-8 pattern, engaging the abs, obliques, and hip flexors through a continuous rotational movement. The circular path of the legs challenges core stability from multiple angles.

How to Perform

  • Sit on the edge of a sturdy chair and grip the sides for support
  • Lean back slightly to activate your core and lift both feet off the floor
  • Begin tracing a figure-8 pattern with your legs by sweeping them to one side and around
  • Keep your legs straight or slightly bent and controlled throughout the motion
  • Engage your abs and obliques to drive the movement
  • Complete the full figure-8 as one repetition
  • Keep your lower back stable and avoid rocking your torso excessively

Muscle Activation

Primary
AbsCore
Secondary
QuadricepsObliques

About the Seated 8 Leg Crunch with Chair

The Seated 8 Leg Crunch with 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.