How to do a Single Leg Curl
Reviewed by JP Michelsen, CPT, B.A. Kinesiology
About Single Leg Curl
Leg Curl Machine
Target muscles worked
Instructions for Proper Form
The Single Leg Curl with a leg curl machine is an isolation exercise targeting the hamstrings. This variation offers unique benefits over traditional, bilateral leg curls by allowing for a greater focus on unilateral strength and correcting imbalances between legs. It's slightly more challenging due to the increased demand for stability and control. Incorporating this exercise can enhance muscle symmetry, improve stability, and contribute to a wider range of motion, benefiting overall leg development and performance in compound lower-body exercises.
- Sit upright in a single leg curl machine while positioning the top support pad just above your knees and placing it just above the back of your ankles onto the lower pad.
- Grab ahold of the handles for additional support.
- Flex your right knee to lower your heel towards towards the floor in a downward arc.
- Once you can no longer flex your knee, return to the starting position and repeat with opposite leg.
Weight & 1 Rep Max Calculator
Average Single Leg Curl standards by male, female, weight, age and height
Use this calculator to see Fitbod's possible first recommendations for you. This would be your starting line, based on more than 4.5 billion logged sets from 1.1 million users.
- beginner8reps25lbs1 Rep Max30lbs
- intermediate8reps30lbs40lbs
- advanced8reps35lbs45lbs
Enter your stats to calculate your Reps & Weight
Alternative Exercises to Single Leg Curl
1. Seated Leg Curl
98.8 mSCORESWAPPED 1,208 TIMESSeated Leg Curl is a weighted, isolation exercise that targets the hamstrings. Because a vast majority of lower body exercises tend to be compound movements, this exercise is a great way to isolate the hamstrings for building muscle mass, and developing strength. The use of a machine restricts your range of motion, and adds stability, allowing you to focus on exertion more than stabilizing the movement.
- Beginner
- Hamstrings
- Leg Curl Machine
2. Lying Hamstrings Curl
95.8 mSCORESWAPPED 480 TIMESLying Hamstring Curl is a weighted, isolation exercise that targets the hamstrings. There’s a relatively short list of isolation exercises for lower body muscle groups. Because of this, this is a great addition to a lower body workout in order to build strength and muscle mass in the hamstrings specifically. The use of a machine restricts your range of motion, and adds stability to the movement, allowing you to focus on exertion rather than stabilizing the movement.
- Beginner
- Hamstrings
- Leg Curl Machine
3. Standing Leg Curl
58.7 mSCORESWAPPED 270 TIMESStanding Leg Curl is an isolation exercise that targets the hamstrings. There’s a relatively short list of isolation exercises for lower body muscle groups. Because of this, this is a great addition to a lower body workout in order to build strength and muscle mass in the hamstrings specifically. By performing this exercise with one leg at a time, you prevent the risk of compensating for strength discrepancies between sides. The use of a machine restricts your range of motion, and adds stability to the movement, allowing you to focus on exertion rather than stabilizing the movement.
- Beginner
- Hamstrings
- Leg Curl Machine
4. Dumbbell Romanian Deadlift
97.6 mSCORESWAPPED 158 TIMESThis exercise is a variation on Romanian Deadlifts. Like other Romanian Deadlifts, this is a compound exercise that primarily targets your hamstrings and glutes. The use of dumbbells can help with some limitations in mobility, and is a great starting point for anyone working towards performing Deadlifts or Romanian Deadlifts with a barbell.
- Beginner
- Hamstrings
- Dumbbells
5. Single Leg Leg Extension
60.6 mSCORESWAPPED 111 TIMESSingle Leg Leg Extensions is a variation of Leg Extensions that uses one leg at a time. Like other leg extensions, this isolation exercise targets your quadriceps. By targeting one leg at a time, you can focus your attention on getting good muscle activation in each leg. In addition, this can help you identify and address strength imbalances between legs. While leg extensions can be a great way to build strength and muscle mass in your quadriceps, they can also place a lot of tension on your knees.
- Beginner
- Quads
- Leg Extension Machine
6. Single Leg Curl
33.2 mSCORESWAPPED 108 TIMESThe Single Leg Curl with a leg curl machine is an isolation exercise targeting the hamstrings. This variation offers unique benefits over traditional, bilateral leg curls by allowing for a greater focus on unilateral strength and correcting imbalances between legs. It's slightly more challenging due to the increased demand for stability and control. Incorporating this exercise can enhance muscle symmetry, improve stability, and contribute to a wider range of motion, benefiting overall leg development and performance in compound lower-body exercises.
- Beginner
- Hamstrings
- Leg Curl Machine
7. Single Leg Romanian Deadlift
80.8 mSCORESWAPPED 65 TIMESSingle Leg Romanian Deadlift is a variation on the more standard Romanian Deadlift. Like other Romanian Deadlift variations, this is a compound movement that primarily targets the glutes and hamstrings. Performing this exercise on one leg, is a great way to identify, and help address, discrepancies in mobility, strength, and stability between sides. This is a great exercise for anyone looking to improve their ability to perform a large number of other compound lower body movements like Squats, Lunges, or even Olympic lifts.
- Intermediate
- Hamstrings
- Dumbbells
8. Romanian Deadlift
98.6 mSCORESWAPPED 53 TIMESRomanian Deadlift is a variation on the more standard Deadlift. It’s a compound exercise that primarily targets your glutes, and hamstrings. Unlike the standard Deadlift, this variation focuses mostly on driving your hips forward to raise the weight, and restricts movement in your knees. This is a great exercise for building strength, and can translate well to other exercises that utilize a hip hinge.
- Intermediate
- Hamstrings
- Barbells
9. Kettlebell Sumo Squat
87.3 mSCORESWAPPED 43 TIMESKettlebell Sumo Squat is a squat variation. Like other squat variations, this exercise is a compound movement that targets the hamstrings, glutes and quads. Positioning your feet wider than you would for a standard squat helps to recruit the inner thigh, as well as help individuals with mobility limitations.
- Intermediate
- Hamstrings
- Kettlebells
10. Smith Machine Stiff-Legged Deadlift
84.6 mSCORESWAPPED 40 TIMESSmith Machine Stiff-Legged Deadlift is a variation on the more standard Romanian Deadlift. Like other Romanian Deadlift variations, this is a compound movement that primarily targets the glutes and hamstrings. The use of a Smith Machine restricts your range of motion, and adds stability to the movement. This allows you to focus on exertion, or learning the movement rather than focusing on stability.
- Beginner
- Hamstrings
- Smith Machine