Yoga guide
Tight hamstrings are mostly about how much stretch you tolerate: in stretching programmes of a few weeks, your range grows because the stretch gets easier to bear, while the muscle itself barely changes. Yoga poses that fold from the hips, such as the strap stretch, head-to-knee pose and pyramid, improve hamstring flexibility much as other stretching does.
Hold each for 30 to 60 seconds on most days, and gently: how hard people stretched made no difference to their gains, and a deep ache at the sitting bone is a reason to stop folding, not to fold harder.
This guide covers what tight means, the best poses lying down, sitting and standing, how long and how often to hold them, strength through the range, pain at the sitting bone, who should change what, and a free routine with a 3D demo of every move.
In stretching programmes of 3 to 8 weeks, people gain range mainly because they tolerate more stretch, while muscle and tendon barely change. Over months the tissue may change too: stretching researchers say intensive stretching can lower muscle stiffness, and in one study, women who had practised yoga for 6 months had less stiff hamstrings than women who hadn't, in groups that chose themselves.
Small studies found more hamstring range after weeks of hatha yoga or daily seated forward folds, and a held yoga programme gained as much as a moving stretching programme. In older adults, yoga improved lower-body flexibility more than no exercise.
In young adults, 30-second holds worked as well as 60 and better than 15, and once a day as well as three times. Over about 65, 60-second holds gained range about twice as fast. Once you're happy with your range, 2 or 3 days a week kept it in a trial.
How hard people stretched made no difference to their gains across 189 studies. Slow stretching to the end of the range strained the hamstrings of 15 professional dancers close to the sitting bone, and they took a median of 50 weeks to get back to their old level.
Strength training and stretching improved range by similar amounts in 11 trials, and slow-lowering hamstring exercise gained as much as stretching. Warrior III, bridges and slow hinges belong in the plan.
A deep ache low in the buttock that is worse when you sit or fold can be high hamstring tendinopathy, and pressing the tendon with the hip bent is thought to aggravate it. Leave folds and strap stretches out for now and follow our high hamstring tendinopathy guide.
"Tight" is usually the point where you stop because the stretch feels too strong. In programmes of 3 to 8 weeks, people gain range mainly because they accept more stretch: across 26 studies, changes in the stiffness and structure of muscles and tendons were trivial. So hamstrings that feel tight often have more range than they let you use, and regular, gentle practice is how you reach it.
A 2025 consensus of 20 stretching researchers recommends "supervised and intensive static stretching of at least 4 min per muscle, 5 days per week, for at least 3 weeks" to lower muscle stiffness. In a comparison of 51 women who did gentle hatha yoga three times a week for 6 months with 30 women who didn't, the yoga group had less stiff hamstrings on a stiffness scan (elastography). The women chose their own groups, so this is an association, not proof that yoga caused it, and tolerance is still the main reason poses feel easier within weeks.
In 41 adults, a full forward bend averaged 111 degrees: about 42 from the lower back and 69 from the hips. Nerves count too: bending the spine and neck forward, as in a slumped seated fold, cut hamstring range by 8 degrees in a small lab study, with no change in the muscle's activity. If lifting your head eases the pull behind your knee, nerve tension is part of your limit.
In 508 adults, hamstring length didn't differ by work setting or lifestyle. In 1,157 Canadians aged 60 to 69, total sitting time wasn't linked with the sit-and-reach test, though men who broke up their sitting more often reached a little further. Both are snapshots at one point in time, so neither can show cause either way.
A deep ache at the sitting bone can be an irritated tendon, a sudden sharp pain or pop is a strain, and burning, tingling or numbness down the leg is a nerve, not a muscle. Each needs a different plan (see the warning signs).
Twice-weekly hatha sessions for 7 weeks added about 4 degrees of hamstring range in 31 students, with no comparison group. In a 2026 trial of 150 young adults, adding 4 minutes of seated forward fold a day to a warm-up for 4 weeks improved the sit-and-reach test more than the warm-up followed by rest; we could read only its summary. Twelve weekly hatha classes with practice at home improved a sit-and-reach test compared with a waiting list in 173 adults averaging 52, and rugby players who did yoga twice a week through a season kept their hamstring flexibility while the others lost some.
In trials of older adults, yoga improved lower-body flexibility more than no exercise. Most of these studies were small and not blinded.
In 35 young adults, a held yoga programme and a moving stretching programme improved the sit-and-reach test by about the same amount in 6 weeks. Across 77 studies, held (static) stretching and contract-relax stretching built more lasting range than bouncing or moving stretches.
In 57 young adults with tight hamstrings, 30-second and 60-second holds, 5 days a week for 6 weeks, gained more range than 15 seconds or none, and the same as each other. One 30-second stretch a day did as well as three. In 62 people aged 65 to 97, 60-second holds gained 2.4 degrees a week against 1.3 for 30-second holds, and kept more of it.
Across 189 studies of 6,654 adults, gains levelled off at about 10 minutes of stretching a week per muscle, and the least flexible gained most. A review of 77 studies found no clear link between the amount of stretching and the gains, and stretching researchers recommend 2 to 3 sets a day, each held for 30 to 120 seconds, for the biggest range. Treat 10 minutes a week per leg as a rough target, not a rule.
How hard people stretched made no difference to their gains in two large reviews. Stay at a clear pull you can breathe through.
In 11 trials (452 people), strength training improved range as much as stretching. In 69 teenage boys with tight hamstrings, 6 weeks of slow-lowering (eccentric) hamstring exercise gained 12.8 degrees, against 12.1 with static stretching. In yoga, that means poses that load the hamstrings while they lengthen: warrior III, standing hand-to-big-toe, bridges and slow hinges.
Across 30 trials, nerve sliders improved hamstring flexibility a little more than static stretching, about 3.5 degrees on a straight leg raise, though contract-relax stretching beat them on another test, and the certainty was low. They suit you if lifting your head eases the pull behind your knee.
In 18 students, the range gained in 6 weeks had gone 4 weeks after they stopped. After 4 weeks of daily stretching, stretching 2 or 3 days a week kept the gain in 32 adults, while stopping lost some. Across 13 studies, range stayed above where people started but slipped back from its peak.
Stretching doesn't reduce overall injury risk, and a 2025 consensus of stretching researchers doesn't recommend it for preventing injuries in general, as our yoga for flexibility guide says.
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Hold each pose for 30 to 60 seconds, once or twice each side. If you're over about 65, aim for the full 60 seconds, which gained range faster in older adults.
Most days while you build range, then 2 or 3 days a week to keep it. Our editorial starting point, as in our flexibility guides: 2 holds of 60 seconds or 4 of 30 seconds for each leg, 5 days a week, which adds up to the 10 minutes a week per leg that one large review found was enough.
Walk for a few minutes, or do cat-cow and elephant walks, before you hold a fold, as our flexibility guides suggest: stretching feels easier once you're warm.
Fold from the hips with a long spine; rounding the back stretches the back, not the hamstrings, as our hamstring flexibility routine says. It's also how to fold safely with osteoporosis.
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Poses usually feel easier within a few weeks, mostly from tolerance. In a 6-week trial of 69 teenage boys, stretching gained about 12 degrees of hamstring range. In small studies, the gain had gone 4 weeks after stopping, but stretching 2 or 3 days a week kept it.
The hip hinge fold's page gives 5 slow folds with 3 breaths at the bottom. Folding from the hips with a long back is our hamstring flexibility routine's tip, and the way the UK osteoporosis consensus advises bending.
See the movement on the 3D figure: Hip hinge fold
Cat-cow: 8 slow waves; the hip hinge fold: 5 slow folds, 3 breaths at the bottom; elephant walks: 20 bends (10 each leg), alternating sides, 2 rounds (the moves' pages). If you feel a hot or tingling line down the back of a leg, bend your knees more.
The strap stretch: 45 seconds each side, and contract-relax: 3 rounds each side (our hamstring flexibility routine); hold 60 seconds if you're over about 65. The 90/90 hamstring stretch: 3 sets of 12 slow straightenings each leg, stopping just before pain, once a day (the move page). Legs up the wall: 2 to 5 minutes, as a gentle stretch and a rest (our editorial starting point). Leave the strap stretch and the 90/90 stretch out if you have pain at the sitting bone.
Staff pose: 3 holds of 30 seconds, sitting on a folded blanket (our editorial starting point). Head-to-knee pose: 45 seconds each side, and the seated forward fold: 60 seconds (our hamstring flexibility routine). The wide-angle seated fold: 30 to 60 seconds (our editorial starting point). If you can't sit on the floor, the chair leg extension and sweep: 5 to 10 slow lifts and sweeps each leg (the move page). Sit on a folded blanket if your lower back rounds, and fold from your hips.
3D demoStaff pose (Dandasana)Beginner · No equipment
3D demoHead-to-knee pose (Janu Sirsasana)Beginner · No equipment
3D demoSeated forward fold (Paschimottanasana)Intermediate · No equipment
3D demoWide-angle seated forward fold (Upavistha Konasana)Intermediate · No equipment
3D demoChair leg extension and sweepBeginner · A bench or boxPyramid: 30 seconds each side, hands on blocks, and downward dog: 5 slow breaths, knees bent generously (our hamstring flexibility routine). The wide-legged forward fold: 30 to 60 seconds, hands on blocks or a chair seat, and triangle: 3 to 5 breaths each side, a hand on a block or your shin (our editorial starting points). The standing toe touch: hold 30 seconds, 1 to 3 times, at least 5 days a week (the move page), but not with osteoporosis: use the hip hinge fold instead.
3D demoPyramid pose (Parsvottanasana)Intermediate · No equipment
3D demoDownward-facing dog (Adho Mukha Svanasana)Beginner · No equipment
3D demoWide-legged standing forward fold (Prasarita Padottanasana)Beginner · No equipment
3D demoTriangle pose (Utthita Trikonasana)Intermediate · A step
3D demoStanding toe touch (forward hang)Beginner · No equipmentWarrior III: 3 to 5 breaths each side, hands on a wall at hip height (our yoga for core class). Standing hand-to-big-toe: 3 breaths each side, with a strap or a bent knee and a hand on a counter (our editorial starting point). Bridges: 8 to 10 slow lifts (our yoga for posture class). Hip hinge practice: 2 sets of 8, shallow (our high hamstring tendinopathy guide). Romanian deadlifts: 2 to 3 sets of 8, lowering for about 3 seconds, twice a week (our touch your toes guide). Single-leg Romanian deadlifts: 2 sets of 6 each side, fingertips on a wall (our editorial starting point).
3D demoWarrior III (Virabhadrasana III)Advanced · No equipment
3D demoStanding hand-to-big-toe pose (Utthita Hasta Padangusthasana)Advanced · No equipment
3D demoGlute bridgeBeginner · No equipment
3D demoHip-hinge practiceBeginner · No equipment
3D demoDumbbell Romanian deadliftIntermediate · A dumbbell
3D demoSingle-leg Romanian deadliftAdvanced · A dumbbellThe seated slider: 10 slow repetitions, 2 to 3 times a day (the move page, an NHS service's dose); the lying slider: 10 with a 1-second pause, 2 to 3 times a day (the move page). Use them if lifting your head eases the pull behind your knee. They should never hurt.
Jefferson curls round the spine under load: leave them out with osteoporosis, and fold from your hips instead. Standing splits drop your head below your heart: keep them brief, or skip them, with glaucoma or high blood pressure that isn't under control, as with downward dog and wide-legged folds. The front splits take the hamstrings to the very end of their range: not a goal for beginners or very flexible joints.
The hamstrings share an attachment on the sitting bone. A deep ache low in the buttock, right at that bone, that is worse when you sit or fold, can be high (proximal) hamstring tendinopathy: an irritated tendon. Pressing the tendon against the bone with the hip bent, as in sitting and in forward folds, is thought to aggravate it. Our pyramid pose page calls the area "A common spot for irritation of the hamstring tendon near the sitting bone".
Leave the folds, the strap stretch and the 90/90 stretch out for now, and follow the staged plan in our high hamstring tendinopathy guide, which starts with gentle strengthening. That guide says: "Leave hamstring stretches out at first, including toe touches, strap stretches and the 90/90 stretch used for hamstring strains: they press the tendon against the bone."
In 15 professional dancers who strained a hamstring in slow stretching movements, with the hip bent and the knee straight, every injury was close to the sitting bone, and they took a median of 50 weeks to get back to their old level, against 16 weeks for 18 sprinters. These were elite dancers, not yoga classes, but it's a reason to stretch to a clear pull, not to the end of your range.
We found no study of hamstring injuries in yoga. Sprains and strains are the commonest yoga injuries overall, in the summary from the US National Center for Complementary and Integrative Health (NCCIH) and in 20 years of US emergency department records.
Across 12 cohort studies (5,459 people), restricted hamstring range went with a slightly higher risk of developing low back pain later. But a review of 17 studies couldn't tell whether people with back pain have tighter hamstrings (very low certainty), sit-and-reach scores didn't predict back pain over about 6 years in 2,747 adults, and people with and without a history of back pain bent forward the same total amount, in a different pattern.
Stretch your hamstrings because it feels good and helps you fold; don't expect it to fix your back. Our yoga for back pain guide covers what helps.
Fold from your hips with a long back, and leave out deep rounding, toe touches and Jefferson curls. The UK osteoporosis consensus says movements with "sustained, repeated or end-range flexion should be modified or avoided", and links fractures with "some yoga positions involving extreme spinal flexion".
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Eye pressure rose within a minute in downward dog and a standing forward fold in a lab study. Favour the strap stretch lying down and folds with your head level, and keep head-down poses brief.
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In later pregnancy, the NHS advises against lying flat on your back for more than a few minutes, so do the strap stretch sitting or standing. Keep folds gentle as your bump grows.
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If you're hypermobile, more range isn't the goal. The NHS advice is "do not overextend your joints just because you can": spend more of your practice on strength through the range.
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Check deep hip bending with your surgical team first, as each move's page advises, especially in the early months.
No folds or strap stretches for now: use the staged plan in our high hamstring tendinopathy guide.
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Start with our 12-minute hamstring flexibility routine on most days while you build range, then 2 or 3 days a week to keep it (our editorial starting point). The touch your toes routine adds nerve sliders and Romanian deadlifts, and the hamstring workout is for strength.
A 12-minute routine to loosen tight hamstrings with strap stretches, PNF, folds and hinges.
12 minBeginner7 movesNo equipmentA 12-minute routine to bring your fingertips to your toes: test, nerve glide, hamstring and calf stretches, a slow hinge for strength at length, then retest.
12 minBeginner7 movesA bench or box, A wallA 25-minute yoga sequence for the hamstrings, hips, inner thighs, spine and shoulders, holding each pose for 30 to 60 seconds, as in the stretching trials.
25 minBeginner12 movesNo equipmentA 20-minute strap routine for the hips and legs: long holds and contract-relax stretches, the do-it-yourself version of assisted stretching.
20 minBeginner9 movesOther / check instructionsA 20-minute yoga cool-down for runners: calves, hip flexors, hamstrings and glutes, one balance pose and a rest, after an easy run or on a rest day.
20 minBeginner11 movesA wallA 15-minute head-to-toe stretch for the neck, shoulders, back, hips, hamstrings and calves.
15 minBeginner11 movesA wallA 35-minute gym hamstring workout: Romanian deadlifts for the hip, seated leg curls for the knee, single-leg Romanian deadlifts, then Nordic curls when ready.
35 minIntermediate7 movesA dumbbell, Strength machineThese are the warning signs from our flexibility guides and our hamstring guides. A&E means accident and emergency. In the US, call 911 for 999, and use your doctor's urgent line or urgent care for NHS 111.
If you have back pain and:
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Stop if you feel a sudden sharp pain, a snap or a pop at the back of the thigh during a stretch: it may be a hamstring strain. Get help from NHS 111 if it's very painful or getting worse, there's a lot of swelling or bruising, it hurts to walk or stand on the leg, or the leg feels very stiff. Our hamstring strain guide has more.
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Ask for an urgent GP appointment or contact NHS 111 if you have back pain and you feel hot, cold, shivery or generally unwell, or the pain is severe, started suddenly or is getting worse quickly.
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In many areas you can refer yourself to NHS physiotherapy without seeing a GP.
Burning, tingling, numbness or pins and needles down a leg usually means a nerve is under tension, so ease off to a position without it. Come up slowly from forward folds and head-down positions, and keep them brief if you have glaucoma or high blood pressure that isn't under control.
The link is weak. Restricted hamstring range went with a slightly higher risk of later back pain across cohort studies, a review couldn't tell whether people with back pain have tighter hamstrings, and sit-and-reach scores didn't predict back pain over about 6 years in 2,747 adults.
Not shown. In 508 adults, hamstring length didn't differ by work setting or lifestyle, and in Canadians aged 60 to 69, total sitting time wasn't linked with the sit-and-reach test. Both are snapshots, so neither can show cause either way.
How hard people stretched made no difference to their gains in two large reviews. Slow stretching to the end of the range strained 15 professional dancers' hamstrings close to the sitting bone, and they took a median of 50 weeks to get back. A clear pull you can breathe through is enough.
In programmes of 3 to 8 weeks, the extra range comes mostly from tolerating more stretch, and muscle and tendon barely change. Over months it may differ: intensive stretching can lower muscle stiffness, and women who had done yoga for 6 months had less stiff hamstrings, in groups that chose themselves.
Often part of it, but a full forward bend came about 42 degrees from the lower back and 69 from the hips, and bending the neck and spine forward cut hamstring range by 8 degrees with no change in the muscle: the nerves count too.
Stretching doesn't reduce overall injury risk, and a 2025 consensus of stretching researchers doesn't recommend it for preventing injuries in general.
Source 3
Range gained over 6 weeks had gone 4 weeks after stopping in one study, and across 13 studies it slipped back from its peak; stretching 2 or 3 days a week kept it in a trial.
With hypermobile joints, the NHS says "do not overextend your joints just because you can". Build strength and control instead.
Source 40
Mostly it's how much stretch you tolerate: in programmes of 3 to 8 weeks, range grows because people accept more stretch, while the muscle barely changes. The nerves at the back of the leg play a part too, and so do your lower back and hips. Sitting hasn't been shown to shorten them.
Yes, much as other stretching is. Small studies found more hamstring range after weeks of hatha yoga or daily seated forward folds, and similar gains to a moving stretching programme. In older adults, yoga improved lower-body flexibility more than no exercise.
The strap stretch lying down, head-to-knee pose, pyramid, the seated forward fold, downward dog and triangle all work the backs of the thighs. Warrior III, bridges and slow hinges strengthen them through their range, which builds range too. Start with the strap stretch, which keeps your back supported and the depth under control.
About 30 to 60 seconds. In young adults, 30 seconds worked as well as 60 and better than 15, and once a day worked as well as three times. If you're over about 65, aim for 60 seconds, which gained range faster in older adults.
Weeks rather than days. Poses usually feel easier within a few weeks, and in a 6-week trial of 69 teenage boys, stretching gained about 12 degrees of hamstring range. One large analysis found gains levelled off at about 10 minutes of stretching a week per muscle, though another review found no clear dose effect.
Most days works well while you're building range. To keep it, 2 or 3 days a week was enough in one trial, and if you stop altogether, the range slips back within weeks.
Not clearly. Restricted hamstring range went with only a slightly higher risk of later back pain, a review couldn't tell whether people with back pain have tighter hamstrings, and sit-and-reach scores didn't predict back pain in 2,747 adults.
It may be the nerves at the back of the leg as much as the muscle: if lifting your head eases the pull, nerve tension is part of it. Bend your knees more, or try a nerve slider, which gained a little more range than static stretching in trials of low certainty. Burning, tingling or numbness down the leg means ease off.
A deep ache at the sitting bone that is worse when you sit or fold can be high hamstring tendinopathy, and pressing the tendon with the hip bent, as in folds and sitting, is thought to aggravate it. Leave folds and strap stretches out for now and see our high hamstring tendinopathy guide. A sudden sharp pain or pop at the back of the thigh is a strain: contact NHS 111 if it's very painful or getting worse, or it hurts to walk.
With osteoporosis, bend from your hips with a long back rather than rounding deeply. With glaucoma or high blood pressure that isn't under control, keep head-down poses brief or use the strap stretch lying down. In later pregnancy, avoid lying flat on your back for more than a few minutes, so do the strap stretch sitting or standing.
We found no study of hamstring injuries in yoga, and stretching doesn't reduce overall injury risk. Sprains and strains are the commonest yoga injuries, so stretch gently and build strength as well.
Exercise education, not a personal prescription, and clinical review of these guides is pending. If you are pregnant, have a health condition such as glaucoma, high blood pressure or osteoporosis, or have had recent surgery, check with a doctor, midwife or physiotherapist before starting, and stop for sharp or increasing pain. Health disclaimer.
