Jefferson Curl
Quick Information
Category
Mobility & Flexibility
Difficulty
Advanced
Equipment
Dumbbell, Plyo Box
Primary muscle group
Erector Spinae, Hamstrings
Secondary muscle groups
Gluteus Maximus, Latissimus Dorsi
Movement pattern
Segmental Spinal Flexion Under Light Load
Training goal
Mobility
Sport
General Athletic Development, Olympic Weightlifting, BJJ, Wrestling
Overview
Purpose. Develop tissue tolerance and control in end-range spinal flexion, rather than avoiding it entirely.
How it fits the system. An advanced-level segmental spinal flexion under light load entry in the Mobility & Flexibility section, programmed to develop mobility. Related work in the library: Prone Press-Up and Scorpion Stretch.
Primary muscles
Erector Spinae, Hamstrings
Secondary muscles
Gluteus Maximus, Latissimus Dorsi
Movement pattern
Segmental Spinal Flexion Under Light Load
Equipment
Dumbbell, Plyo Box
Difficulty
Advanced
How to Perform
- Stand on a box holding a light dumbbell or kettlebell with straight arms.
- Tuck the chin and roll down one vertebra at a time, keeping the legs straight.
- Let the weight hang at the bottom of the available range for one to two seconds.
- Reverse the movement, stacking the spine from the bottom up.
Coaching Cues
- "Roll down like a chain, one link at a time."
- "Legs stay locked."
- "Never force the range."
Common Mistakes
- Using heavy loads — this is a mobility drill, not a strength lift.
- Rushing the tempo.
- Performing it while in an acute back-pain episode.
Progressions & Regressions
Progressions
Add very small load increments over months, or increase range from a higher box.
Regressions
Perform unloaded, or from the floor with a reduced range.
When to Use It
When to use
End of session, in dedicated mobility blocks, for healthy backs only.
When not to use
Acute or recent disc-related low-back pain, or any radicular symptoms.
Programming
3–5 reps, 2–3 sets, very light load, 60 seconds rest.
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