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Exercise guide

Jefferson Curl

A loaded spinal-flexion drill: standing tall with a light weight, you round the spine one vertebra at a time and restack it, building segmental control and hamstring/spinal-erector flexibility under load.

What this exercise works

Muscles
erector spinae · hamstrings · gluteus maximus
Goals
hypertrophy · strength
Equipment
Dumbbells
Category
Strength
Difficulty
intermediate

Demonstration

Jefferson Curl Step 1

Step 1

Jefferson Curl Step 2

Step 2

How to perform the movement

  1. Stand tall holding a light dumbbell with straight arms, feet roughly hip-width.
  2. Tuck your chin and begin rounding the spine from the top, one vertebra at a time.
  3. Curl down slowly, letting the weight hang and keeping the legs mostly straight.
  4. Reach the bottom with the back fully rounded and a stretch through the hamstrings.
  5. Reverse it, restacking the spine from the bottom up back to standing.

Technique cues and common mistakes

  • Use a very light weight -- this is a controlled mobility drill, not a heavy lift.
  • Round segment by segment; do not hinge at the hips like a stiff-leg deadlift.
  • Move slowly and never bounce at the bottom.

This is general movement information. It is not medical advice or an individual prescription.

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