Leg-Up Hamstring Stretch
The leg-up hamstring stretch has you lying on your back and raising one leg toward the ceiling, using your hands or a strap to gently pull it closer, while the other leg stays down on the floor. Lying flat keeps your lower back supported and takes standing balance out of the equation entirely, which makes this one of the more comfortable ways to stretch a tight hamstring, especially after a lower-body workout or first thing in the morning.
Why it works
The hamstrings cross both the hip and the knee, so a deep stretch needs the hip flexed while the knee stays straight. Lying on your back and lifting one leg does exactly that, and because your torso is supported by the floor, you don't need any balance or core strength to hold the position. That lets you focus entirely on relaxing into the stretch rather than fighting to stay upright, which is why this version tends to reach deeper than a standing hamstring stretch for most people.
Set up
- Lie on your back with both legs extended flat on the floor.
- Keep the leg you're not stretching flat on the floor, or bend that knee with the foot planted if it's more comfortable for your lower back.
- Have a strap, towel, or your hands ready to support the leg you'll raise.
How to do it
- Raise one leg straight up toward the ceiling, keeping the knee as straight as comfortable.
- Hold the back of your thigh, calf, or a strap looped around your foot to support the leg's weight.
- Gently pull the leg closer to your torso until you feel a stretch along the back of the thigh, not a sharp pull behind the knee.
- Hold the stretch, breathing normally, without bouncing or pulsing.
- Release slowly and lower the leg back down before switching sides.
Form cues
- Keep the resting leg flat or planted, not lifting
- Knee straight but never locked hard
- Pull from the strap, not with your neck or shoulders
- Stretch tension, never sharp pain
Breathing: Breathe slowly and evenly throughout the hold; a long exhale as you settle deeper into the stretch can help the muscle relax.
Common mistakes
Locking the knee out hard to force a deeper stretch.
Fix: Keep a soft bend in the knee if a straight leg pulls too hard behind the joint; the stretch should be felt in the muscle, not the tendon.
Pulling the leg down using the neck and shoulders instead of the arms.
Fix: Relax your neck and shoulders flat on the floor and let your arms do the pulling.
Bouncing the leg to try to stretch further.
Fix: Hold the position still; a static hold is safer and just as effective as pulsing.
How to program it
- Hold each side for 20 to 30 seconds, and repeat two or three times per leg.
- This is gentle enough to do daily, especially after a lower-body session or first thing in the morning when the hamstrings feel tight.
- It works well as a cool-down stretch alongside a hip flexor or calf stretch, covering the whole back of the leg in one short routine.
Safety notes
- Stop pulling the leg closer the moment you feel a sharp pull or pain behind the knee; that's a sign to back off, not push through.
- If you have a lower-back condition, keep the resting leg bent with the foot planted to reduce strain on your spine.
Exercise profile
- Force
- Push
- Mechanics
- Isolation
- Category
- Stretching
Frequently asked questions
How long should I hold the leg-up hamstring stretch?
20 to 30 seconds per side, repeated two or three times, is enough for most people to feel the tightness ease.
Do I need a strap for this stretch?
No, your hands work fine if you can reach comfortably behind your thigh or calf. A strap or towel just helps if your hamstrings are tight enough that reaching the leg directly pulls your shoulders off the floor.
Leg-up hamstring stretch vs standing hamstring stretch: which is better?
The lying version is easier on your lower back and balance since the floor supports your torso. The standing version needs no floor space and works well when you're short on time or already on your feet.
Why do I feel this behind my knee instead of in the middle of my hamstring?
That usually means the knee is locked too straight. Soften the bend slightly and the stretch should shift from the tendon behind the knee into the belly of the muscle.