Jefferson curl

Muscle group
Back
Equipment
Barbell
Primary muscles
Hamstrings, Lower back
Secondary muscles
Glutes
Jefferson curl
  1. Stand on a stable elevated surface holding a light barbell in front of your thighs, with your legs straight but not locked.
  2. Tuck your chin and slowly round your spine from the top down, allowing the barbell to descend toward the floor.
  3. Lower as far as you can comfortably control, then slowly reverse the movement to return to standing.

Tips

  • Initiate the movement by tucking your chin and rounding the upper spine first, then continue sequentially down through the mid and lower back so each vertebra moves one at a time.
  • On the way back up, reverse the sequence by extending the lower spine first and finishing with the head, so the return mirrors the descent.
  • Start with a light barbell and only lower as far as you can maintain smooth, controlled movement through the spine, stopping before the movement becomes jerky or uncontrolled.

Common mistakes

  • Hinging at the hips and keeping the spine relatively flat rather than deliberately rounding through each segment of the back.
  • Rushing the descent so the barbell drops quickly rather than being lowered under continuous control.
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