Heel Slide
What Is the Heel Slide?
Heel Slide is an isolation exercise that primarily targets the hamstrings and also engages the hip flexors, with the quadriceps guiding the leg back out. It is a beginner-level movement done lying on your back, sliding one heel along the floor toward your buttocks so the hip and knee bend, then sliding it away again until the leg is straight.
The heel slide is first and foremost a range-of-motion drill. Physical therapists use it to restore knee bend after knee surgery or injury, and it is one of the most common early exercises after a total knee replacement; it also appears in hip replacement programs. Because the foot stays on the surface the whole time, the leg is supported and you decide exactly how far the knee bends, so it is easy to start small and add range over the weeks. In a trial of patients in hospital after total knee replacement, those who did active heel slides alongside standard physical therapy had less pain and better function at discharge than those who used a continuous passive motion machine instead, while knee range of motion came out similar in both groups.
With no load, no impact and the option of doing it on a firm bed instead of the floor, the heel slide suits older adults, people with stiff or arthritic knees and anyone returning to exercise who needs a gentle way to move the knee and hip. It is also used in core-stability work: with the abdominals braced and the pelvis kept still, the sliding leg becomes a load the trunk has to control, which is why it often sits next to the Pelvic Tilt and the Dead Bug in back care routines.
The hamstrings only move the weight of the lower leg against floor friction, so the heel slide does not build meaningful strength on its own. This version keeps the other leg straight on the floor; bending the other knee with that foot flat is a common alternative that makes the pelvis and lower back easier to keep steady. Once full, comfortable knee bend comes easily, the Hamstring Bridge and the Sliding Leg Curl load the same knee-bending action with body weight, and the Glute Bridge adds hip strength.
Muscles Worked
- Biceps Femoris
- Primary
- Semimembranosus
- Primary
- Semitendinosus
- Primary
- Rectus Femoris
- Medium
- Sartorius
- Medium
- Gastrocnemius (Medial Head)
- Minimal
- Rectus Abdominis
- Minimal
Instructions
- Lie on your back on the floor or a firm bed with both legs straight and your arms resting by your sides, palms down.
- Gently brace your abdominals so your pelvis and lower back stay still.
- Keeping the heel in contact with the floor, slowly slide it toward your buttocks so the knee bends and rises toward the ceiling.
- Keep the knee and toes pointing up, without letting the knee fall inward or outward.
- Stop where you feel a comfortable stretch or pressure in the knee and pause for 2 to 3 seconds.
- Slowly slide the heel back out until the leg is straight on the floor again.
- Keep the other leg straight and relaxed and breathe steadily throughout.
- Complete all repetitions on one side, then switch legs.
Common Mistakes
Forcing the bend
Pushing into sharp knee pain to reach more range, instead of bending only as far as is comfortable and letting the range build over sessions.
Rushing the slide
Snapping the heel in and out uses momentum and skips control, so both directions should be slow and smooth.
Arching the lower back
Letting the lower back lift and the pelvis tip as the knee bends shifts the work away from the hip and knee and strains the back.
Letting the knee drift
Allowing the knee to fall inward or outward instead of keeping the knee and toes pointing at the ceiling twists the hip and knee.
Lifting the heel
Raising the foot off the surface turns the slide into an unsupported leg lift and loses the support that makes it gentle on the knee.
Injuries
Heel Slide is a low risk exercise when performed with proper technique. The leg stays supported on the floor, there is no external load, and you control how far the knee bends. Problems come from forcing range: pushing into sharp knee pain, yanking the heel in with a strap, or letting the lower back arch and the pelvis twist to fake a deeper bend.
After knee or hip surgery, follow your surgeon's or physical therapist's instructions on when to start, how far to bend and how many repetitions to do. Some hip replacement programs limit how far the hip may bend in the early weeks, and those limits override any range described here. A mild stretch or pressure around the knee is normal. Sharp pain, pain that builds with each repetition or soreness that lasts into the next day means you should do less, and a knee that becomes hot or noticeably more swollen is a reason to stop and contact your clinician.
To make it easier, wear socks on a smooth floor or put a plastic bag or towel under the heel to cut friction, bend the other knee with that foot flat, or loop a towel or strap around the foot and use your hands to gently help the knee bend. To progress, hold the end position a little longer and slow the return, then move on to the Glute Bridge or the Hamstring Bridge once the full range feels easy.
- Primary Focus
- Hamstrings
- Equipment
- Body weight
- Modality
- Stretching
- Difficulty
- Beginner
Alternative Exercises
Frequently Asked Questions
- Q: Are heel slides good after a knee replacement?
Yes, heel slides are one of the standard early exercises after a total knee replacement because they rebuild knee bend while the leg stays supported. Your surgeon or physical therapist will tell you when to start and how far to bend, and their plan takes priority over general guidance.
- Q: How many heel slides should I do, and how often?
Home programs commonly use 1 to 3 sets of 10 repetitions per leg, often more than once a day for a stiff or recovering knee. Start at the low end and adjust based on how the knee feels the next day, or follow the dose your clinician gives you.
- Q: How do I do heel slides on carpet or a bed?
Reduce friction under the heel by placing a plastic bag or a small towel beneath it, or wear socks on a smooth floor. Looping a towel or strap around the foot also lets your hands gently help the knee bend.
- Q: Should the other leg be straight or bent?
Either works. This version keeps the other leg straight, while bending the other knee with that foot flat makes the pelvis and lower back easier to keep still, so it is the better choice if your back arches as you slide.
- Q: Do heel slides make your legs stronger?
Only a little, because the load is just the weight of your lower leg against floor friction. They mainly restore and maintain range of motion; for strength, progress to body-weight moves such as the Glute Bridge or Hamstring Bridge.