TRX Pendulum

CoreTRX

A dynamic core movement from a plank where both legs swing side to side together like a pendulum, staying suspended in the air without touching down — trains obliques and hip control under continuous tension.

Demo: Sundried (reference)

Sets

3

Reps

10-12 per side

Rest

1 min

Contraindications

Shoulder instability — reduce range of motion.

Setup

Feet together in the foot cradles at mid-calf, hands under shoulders in a strong plank.

Execution

  1. 1Brace the core in a solid plank
  2. 2Swing both legs together to one side, keeping them off the ground
  3. 3Swing back through center to the other side in a controlled pendulum motion
  4. 4Keep the upper body stable throughout, letting only the hips/legs move

Key cues

  • Upper body stays quiet — only the lower body swings
  • Keep the legs together throughout the swing
  • Control the pendulum, don't let momentum take over
  • Keep feet off the floor for the entire set

Common faults

  • Letting the shoulders rock side to side with the legs
  • Feet touching the ground between reps
  • Swinging too fast and losing control
  • Reduced range of motion to make it easier

Tweaks

  • Slow the tempo significantly for more time under tension
  • Reduce range of motion to regress
  • Combine with a mountain climber circuit

Regressions

Muscles

Primary: Obliques, Rectus Abdominis

Secondary: Shoulders, Hip Flexors

Notes

TRX-specific. Angle = intensity: the more horizontal the body relative to the floor, the harder pressing/pulling/plank-style TRX moves become. For pulling movements (rows, face pulls), walking feet toward the anchor and leaning back further increases load. For pressing movements (push-ups, chest press), walking feet away from the anchor and standing more upright decreases load; moving feet closer to directly under the anchor point increases load. Foot position in the straps (heel vs. midfoot vs. toe) also changes leverage and load for lower-body moves. Swing range and tempo are the intensity levers for the pendulum — a wider, slower-controlled swing is significantly harder than a small, fast one.

Sources

Attribution: TRX Training