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How to do the exercise
The Jefferson Curl is an effective mobility and strength exercise that targets the posterior chain, especially the hamstrings and lower back. It’s widely used in strength training and mobility routines to improve flexibility and spinal control. By performing the movement slowly and with light weight, you can increase hamstring mobility and strengthen the muscles through a deep range of motion. Here’s how to perform the Jefferson Curl:
1. Starting position
Stand on an elevated surface like a box, bench or weight plate so your feet are close to the edge. Hold a light weight (such as a dumbbell or weight plate) in your hands and let it hang in front of your body. Keep your legs straight and your body relaxed but controlled.
2. Controlled spinal flexion
Start by slowly tucking your chin towards your chest and rounding your upper back. Gradually roll your spine down vertebra by vertebra while keeping your legs straight. Let the weight move toward the floor as your torso lowers.
3. Deep stretch position
Continue lowering your upper body as far as your mobility allows. Because you’re standing on an elevated surface, the weight can travel below your feet, increasing the stretch in your hamstrings and posterior chain. Only go as far as you can maintain control and comfort.
4. Return to standing
Reverse the movement slowly by stacking your spine back up from the lower back to the neck. Keep the motion controlled and avoid using momentum. Once you’re upright again, reset your posture and repeat for your desired number of reps.
Recommended equipment for Jefferson Curls
Main Muscles Worked
The Jefferson Curl mainly targets:
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Hamstrings – receive a deep stretch and are strengthened through a long range of motion.
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Erector spinae (lower back) – control the spinal flexion and extension during the movement.
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Glutes – support hip stability and assist when returning to the standing position.
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Core muscles – help maintain control and protect the spine during the slow movement.
Strengthening these muscles while improving mobility can help reduce injury risk, improve hamstring flexibility, and support better performance in exercises like deadlifts, squats, and various Calisthenics movements.
If you're looking for other exercises, check out our Youtube video:
Common Mistakes
Although the Jefferson Curl is great for mobility, incorrect execution can increase the risk of injury. Pay attention to the following:
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Using too much weight: Start very light and prioritize controlled movement and mobility.
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Bending the knees: The legs should stay straight to properly stretch and load the hamstrings.
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Moving too fast: This exercise should be slow and controlled to safely strengthen the spine and posterior chain.
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Going beyond your mobility: Only lower as far as your body comfortably allows. Mobility will improve gradually over time.
Focus on slow, controlled reps and gradual progress to safely build mobility and strength in the posterior chain.
Discover more Exercises
Looking for more ways to level up your training? Check out our full exercise overview or try these effective exercises that perfectly complement your training:
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