Frog Reverse Hyperextension
What Is the Frog Reverse Hyperextension?
Frog Reverse Hyperextension is an isolation exercise that primarily targets the glutes, with the hamstrings and lower back assisting. It is an intermediate-level movement because lifting both legs from the hips while holding the frog position, without arching the lower back, takes real control. Unlike the straight-leg Reverse Hyperextension, this variation keeps the knees bent and apart with the heels together, resembling a frog's legs, while the torso lies face down on a flat bench.
The leg position is what makes this a glute exercise. Bending the knees shortens the hamstrings, so they contribute less to hip extension and the glutes take a larger share of the work. Turning the thighs out adds to that effect: a study of healthy young men who lifted one bent-knee leg just off a table while lying face down found more glute activity and less hamstring activity when the thigh was turned out and slightly away from the body than when it pointed straight back.
Because the torso rests on the bench and the only load is the weight of the legs, the spine is not compressed the way it is under a barbell. That makes the movement a common choice for glute activation in a warm-up, accessory volume after squats, deadlifts or Barbell Hip Thrusts, or a high-rep finisher at the end of a lower-body session.
It suits lifters who want extra glute volume without more spinal loading and trainees who tend to feel hip extension mostly in their hamstrings or lower back. A deliberate glute squeeze at the top matters here, since the lower back can easily take over the last part of the lift. If lifting both legs in the frog position is too hard, build up with the Glute Bridge and the Bent Leg Kickback first, and the Dumbbell Frog Hip Thrust trains the same leg position lying on your back.
Muscles Worked
- Gluteus Maximus
- Primary
- Gluteus Medius
- High
- Adductor Magnus
- Medium
- Erector Spinae
- Minimal
- Semitendinosus
- Minimal
Instructions
- Lie face down on a flat bench with your chest and stomach on the pad and your hips at the end of the bench.
- Place your hands on the floor beside the front legs of the bench, or hold the legs, with your elbows bent.
- Let your legs hang behind the bench with your knees resting on the floor, bent to about 90 degrees.
- Turn your knees out and bring your heels together so your legs form a frog shape.
- Keep your chest on the bench, tuck your chin slightly and brace your core.
- Squeeze your glutes and lift both knees off the floor, raising your thighs behind you while keeping your knees bent and heels together.
- Stop when your thighs are about in line with your torso, without arching your lower back, and hold the squeeze for a moment.
- Lower your legs slowly until your knees lightly touch the floor.
- Repeat for the desired number of reps.
Common Mistakes
Arching the lower back
Overextending the spine can cause discomfort and reduce glute activation.
Using momentum
Swinging the legs instead of controlled lifting shifts focus away from the glutes.
Losing the frog position
Letting the heels separate, the knees drift together or the legs straighten turns the lift into a regular reverse hyperextension and puts more of the work on the hamstrings.
Lifting the chest off the bench
Raising the head and chest as the legs come up turns the rep into a back extension and shifts the work to the lower back.
Rushing the movement
Fast reps lead to poor control and lessen muscle engagement.
Injuries
Frog Reverse Hyperextension is a low risk exercise when performed with proper technique. It puts minimal stress on the spine and joints, making it a safer option compared to loaded back exercises.
Potential injuries can include lower back strain or hip discomfort, especially if the movement is rushed or overextended. Hyperextending the lower back at the top can also place unnecessary pressure on the lumbar spine. Repeated, forceful arching of the lower back is a known source of facet joint irritation and of stress injuries to the vertebrae, so the lift should end when the thighs are about in line with the torso. Resting the knees on a hard floor between reps can also irritate the kneecaps, so a mat under the knees helps.
To reduce injury risk, focus on a slow and controlled range of motion. Avoid using momentum, and make sure your hips remain supported throughout the movement. Stop the set if you feel sharp or pinching pain in the lower back, or pain in the hip or groin, and shorten the range before trying again.
If the lower back takes over, regress to lifting one leg at a time with the other knee on the floor, or to the Glute Bridge. To progress, add a longer squeeze at the top, slow the lowering phase, or add light ankle weights while keeping the same frog position.
- Primary Focus
- Glutes
- Equipment
- Bench and body weight
- Modality
- Strength
- Difficulty
- Intermediate
Alternative Exercises
Frequently Asked Questions
- Q: Can I do this exercise without a machine?
Yes, you can use a flat or elevated bench if a reverse hyper machine isn’t available.
- Q: Is this good for people with back pain?
It can be, since the bench supports your torso and your spine carries no load, but it depends on what aggravates your back. Keep the lift short of the point where your lower back arches, and get ongoing or worsening back pain assessed before adding it.
- Q: How many reps should I do?
Start with 2 or 3 sets of 10 to 15 controlled reps. Because the only load is the weight of your legs, progress with more reps, a longer squeeze at the top or light ankle weights once 15 clean reps feel easy.
- Q: How is it different from a frog pump?
Both use the same heels-together, knees-out leg position. In the Dumbbell Frog Hip Thrust you lie on your back and drive your hips up, while here your torso stays on a bench and you lift your legs behind you, so no weight is needed.