Primary
Hamstrings
Secondary
Glutes, Core
Equipment
Stability Ball
Difficulty
Intermediate
Type
Pull
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The example below shows one possible placement. Your purchased plan is built from your assessment, and Ely checks every exercise before approving it.
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This page is not medical advice or a rehabilitation protocol. Ely's personal review applies to purchased workout plans and does not replace an in-person assessment by a licensed healthcare professional.
The stability ball curl bridges your hips up while rolling a stability ball toward your glutes with your heels, training knee flexion without a leg curl machine. The unstable ball surface increases core engagement and makes the exercise more challenging than it appears. This is one of the best home gym alternatives to machine leg curls.
When to use it
Use when no leg curl machine available.
Who it's for
All levels with stability ball access.
Keep your hips elevated throughout—dropping them shifts work away from hamstrings. Squeeze your hamstrings hard at peak contraction when the ball is closest to your glutes. Control the ball during both the curl and the extension.
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Lie on back with heels on stability ball.
Lift hips off floor into bridge position.
Curl heels toward glutes, rolling ball in.
Squeeze hamstrings at peak contraction.
Extend legs to roll ball back out.
Keep hips elevated throughout.
Great for hamstring activation.
Also works glutes and core.
Squeeze hamstrings hard at top.
Program stability ball curls when leg curl machines are unavailable, as part of home workouts, or as a variation from machine curls. Use them for moderate to high reps since the instability limits loading. They pair well with any hip hinge movement.
Dropping hips during curl.
Losing hip position during the Stability Ball Curl changes the loading pattern and can reduce the intended work for your Hamstrings. Keep your hips aligned with the setup cues and move only through the range you can control.
Not full range of motion.
Cutting the range of motion short on the Stability Ball Curl can reduce the training stimulus for your Hamstrings. Use the largest comfortable range you can control without changing the intended setup.
Rolling too fast for optimal results.
Rushing through the Stability Ball Curl makes it easier to lose position and harder to keep tension on your Hamstrings. Slow down enough to control both the lifting and lowering portions of each rep.
All levels with stability ball access.
These ranges illustrate ways to organize training. They are not an individual prescription. Adjust them for the exercise, your experience, and the rest of your program.
Heavier loads can be useful for developing maximum strength. The range shown is an example, and the load must match your current technique and capacity.
Muscle growth can occur across different loads and repetition ranges. This example is not a uniquely effective zone; your overall program and effort also matter.
This is an example of a longer set. A repetition target alone does not establish joint safety or whether the exercise is appropriate for you.
Example: 3 sets of 12-15 reps. Rest 60 seconds.
Background for resistance exercises: the 2026 ACSM position stand covers healthy adults, and a load-comparison review found similar muscle growth across loads in studies using sets taken to muscular failure. These findings do not validate every exercise-specific range shown here or require training to failure.
This is one example of how Stability Ball Curl could sit inside a complete workout. Your plan may use different movements after Ely checks your assessment.
Sample workout
MySetPlan guides you set by set, times your rest, records your work, and tells you what to do next from the plan Ely approved.
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Frequently Asked Questions About the Stability Ball Curl
The Stability Ball Curl primarily targets the Hamstrings, making it an effective exercise for hamstrings development. Secondary muscles worked during the Stability Ball Curl include Gluteus maximus, Core, providing additional training stimulus. Stabilizer muscles engaged include Hip stabilizers.
Our library labels Stability Ball Curl as intermediate. That category is not an individual assessment. Review the setup, movement instructions, and safety notes, and seek qualified guidance if you are unsure how to perform it.
The programming section shows examples for Stability Ball Curl. The appropriate amount depends on your current ability, the exercise, and your other training. The listed ranges are not an individual prescription or a guarantee of a particular outcome.
The main equipment listed for Stability Ball Curl is a stability ball. Check the instructions for any additional support, anchor, bench, rack, or clear space needed. The equipment label alone does not confirm that your home setup is suitable.
Good alternatives to the Stability Ball Curl include: Lying Leg Curl, Slider Leg Curl, Nordic Curl. These exercises target similar muscle groups as the Stability Ball Curl and can be used as substitutes based on your equipment availability, gym setup, or training preferences.