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Calf stretch

Also called wall calf stretch, standing calf stretch, gastrocnemius stretch, soleus stretch, Achilles tendon stretch

A stretch that pulls the foot up toward the shin, with the knee straight or bent. What studies measured in the calf muscles, Achilles tendon and ankle, and what trials of calf stretching found.

Region
Lower leg
Muscles
gastrocnemius, soleus
Updated
October 23, 2026
Reviewed
October 23, 2026 · how entries are checked

Revised October 15, 2026: Corrects a statement that the gastrocnemius is the only lower-leg muscle crossing both the knee and the ankle.

Movement

Straight knee or bent knee

In one study, the calf stretch pulled the foot up toward the shin, a movement called dorsiflexion6. The gastrocnemius, the large two-headed calf muscle nearest the skin, crosses both the knee and the ankle7,8. So the positions of both joints affect its length9. The soleus, a wide, flat calf muscle under the gastrocnemius, crosses only one joint and points the foot down10.

One study of runners used a straight-knee gastrocnemius stretch and a bent-knee soleus stretch, each held 30 seconds11. In 20 volunteers without symptoms, bending the knee 20 degrees allowed about 13 to 15 degrees more dorsiflexion than a straight knee12. Bending it further added no more12. The authors took this to mean that 20 degrees of knee bend removes the gastrocnemius’s hold on the ankle12. Standing, the same volunteers averaged 25 degrees of dorsiflexion with the knee straight and 39 degrees with it bent 75 degrees12.

Where the foot bends

One study of foot position included 27 people13. They had less than 10 degrees of dorsiflexion and a current or recent long-term lower-limb condition13. A standing gastrocnemius stretch with the foot rolled inward (pronation) gave more bending at the midfoot and forefoot, the middle and front of the foot, than with the foot rolled outward (supination)13. No difference at the ankle and rearfoot (the heel end of the foot) was detected13.

What it loads

Which muscle takes the stretch

One study mapped stiffness (how much force it takes to stretch something by a given amount) in the lower-leg muscles of young adults without symptoms1. It measured them during passive dorsiflexion, with the foot moved up for the person1:

Knee positionStiffest muscleStiffest part
Straight, 22 peopleMedial (inner) gastrocnemius, then lateral (outer) gastrocnemius1Lower part, in 80% of the 221
Bent 90°, 20 peopleSoleus1Lower part, in all 201

In the same study, the deep calf muscles showed low stiffness with the knee straight or bent1.

The Achilles tendon and the sole

The superficial calf muscles all end on the Achilles tendon14. In 20 healthy people, both gastrocnemius heads, the soleus and the Achilles tendon were stiffer with the knee straight than with it bent 90 degrees15. The plantar fascia, a band of tough tissue along the sole of the foot, showed the opposite: it was stiffer with the knee bent15.

The tibial nerve

Two cadaver studies (bodies donated for study) measured the tibial nerve, the main nerve at the back of the lower leg16,17. In ten cadavers, dorsiflexion raised strain at the ankle by 3.9% on average; strain is stretch as a share of resting length16. It was higher when the knee was straight or the hip bent beforehand16. In another cadaver study, with the knee straight, dorsiflexion moved and strained the nerve17. It did not affect the nearby biceps femoris, a hamstring muscle17.

How the body adapts

In the minutes after one stretch

In 12 people, stiffness of the plantar flexors (muscles that point the foot down) fell after 2, 4 and 8 minutes of passive stretching18. It was back to baseline within 10 minutes after 2 minutes of stretching, and within 20 minutes after 4 or 818.

Two studies of 14 healthy volunteers compared doses in one session4,19:

StretchRangeMaximum strengthTendon stiffness
Three 60-second holdsUp for at least 5 minutes19No change19No change19
Five 60-second holdsUp at 0, 5 and 10 minutes4Down at 0, 5 and 10 minutes4No change4

After five holds, stiffness fell in the calf muscle for up to 5 minutes, but not in the tendon4.

In 12 healthy people, a 5-minute static stretch lowered the stiffness of the medial gastrocnemius, measured with the knee straight, but not of the lateral gastrocnemius or soleus6. Afterwards, the calf muscles and Achilles tendon went slack at a more upturned ankle angle6. The authors concluded that much of the drop in muscle stiffness could come from this longer slack length6. In 15 young and 15 older women, average age 76, a 5-minute straight-knee stretch lowered stiffness in both gastrocnemius heads20. The percentage changes did not differ significantly between the age groups20.

Range over weeks of stretching

Reviews mostly found gains in dorsiflexion range, though of different sizes2,21:

  • A meta-analysis of 20 trials in healthy people found static stretching raised range by about 5 degrees2. Proprioceptive neuromuscular facilitation (PNF, a stretching technique) gained about 4 degrees2. Ballistic (bouncing) stretching showed no significant gain2.
  • A meta-analysis of 5 trials found a small increase of about 2 to 3 degrees, of unclear clinical importance21.
  • A meta-analysis of 23 studies, with 734 participants, found in healthy people some evidence that static stretching alone raised range22.
  • A network meta-analysis (one comparing many options at once) pooled 41 trials in 1,670 active, healthy adults23. For active range, foam rolling (rolling the muscle over a firm foam cylinder) ranked highest and gave the largest short-term gain23. Static stretching ranked best for keeping gains over the long term23. PNF and foam rolling ranked highest for passive range23.

Single trials found different things3,11. In 101 adults, 6 weeks of daily wall stretches of 30 seconds to 2 minutes did not change active range, against no stretching3. In 33 recreational runners, 3 weeks of daily stretches raised range in the stretching group, and not in the control group11.

Another trial split 80 people into three stretching groups and a control group24. Daily stretching in an orthosis (a brace) for 10, 30 or 60 minutes all raised flexibility24. A knee-to-wall test (a standing test of how far the knee moves forward past the toes toward a wall) improved about 10 to 14 percent24. That test showed no difference between the three daily times24. The brace’s own angle gauge showed larger gains with longer daily stretching, largest at 60 minutes24.

What changes inside the muscle

Studies disagree on whether stretching over weeks lengthens the muscle’s fascicles (bundles of muscle fibres)25,26:

  • In 18 young men, half of whom stretched for 4 weeks, stretching raised range and lowered passive turning force, without lengthening fascicles25. Movement at the myotendinous junction (where muscle fibres join their tendon) increased25.
  • In 11 males, 6 weeks of stretching lengthened gastrocnemius fascicles by 25% near that junction26. In the muscle belly (the thick middle part of a muscle), they lengthened 5.1%26. Muscle thickness rose 5.6%, with no change in the hardest effort they could make26.
  • In the same 11 males, lateral gastrocnemius fascicles lengthened more than medial ones26.
  • In 12 people, 3 weeks of twice-daily stretching raised range by 19.9%27. This came from more stretch tolerance (how much stretch a person will accept) and from muscle and fascicle lengthening27. It did not come from changes in muscle activation or reflexes27.

In the 33 runners, a run thinned the Achilles tendon by about 6% before and after 3 weeks of stretching, with no difference between groups11. The network meta-analysis of 41 trials reported no adverse events linked to stretching or foam rolling23.

In people with heel pain, Achilles pain or cramps

Heel pain

Heel-pain studies compared calf and plantar fascia stretching28:

  • A systematic review (a set, checkable search of the research on a question) found 6 studies, in 365 people28. That was too few to judge whether stretching, including calf stretching, works better than control or other approaches for pain or function28.
  • The same review found some evidence that plantar fascia stretching reduced some aspects of pain more than calf stretching alone, in the short term28.
  • A meta-analysis of 8 randomised trials in plantar fasciitis (heel pain) found moderate-quality evidence that plantar fascia stretching reduced pain more than calf stretching29. It found very low-quality evidence that calf stretching, alone or combined, beat sham stretching, a dummy version used for comparison29.
  • One randomised study included 101 people with long-lasting plantar fasciitis30. At 8 weeks, fascia stretching gave better worst-pain and first-step morning pain scores than an Achilles tendon-stretching programme30.

In a randomised study of 94 people with heel pain, sustained Achilles stretches of 3 minutes and shorter intermittent ones both raised flexibility31. Outcomes did not differ significantly between the two31. In that study, greater gains in flexibility went with greater drops in pain31.

Achilles pain and night cramps

One randomised trial included 45 people with Achilles tendon pain for at least 3 months32. For 3 months, one group did daily stretching and one did daily eccentric exercise (muscle work done while the muscle lengthens)32. Both improved over a year, with no significant difference between groups32. The authors could not tell how much was natural improvement32.

A Cochrane review, a systematic review done to the Cochrane Collaboration’s published standards, looked at night-time leg cramps33. In one trial of 94 people aged 60 and over, calf stretching alone for 12 weeks may have made little or no difference to cramp frequency33.

In one trial of 80 people aged 55 and over, 6 weeks of calf and hamstring stretching may have reduced cramp severity, against no stretching33. Its effect on frequency is uncertain33. Across three trials of 201 people aged 50 and over, nobody reported adverse events, though the trials were too small to detect uncommon ones33.

Progressive overload

A 2026 position stand on resistance training describes progressive overload as the need to increase the stimulus placed on the muscle throughout a training programme34. Calf stretching studies have varied how often, how long and how hard people stretched35,36,37.

How often and how long

In 24 men, two 6-week static calf stretching programmes had about the same weekly stretching time35. Stretching 2 minutes three times a week raised dorsiflexion range and lowered medial gastrocnemius stiffness35. Stretching 6 minutes once a week brought no significant change in either35.

A meta-analysis of five randomised trials compared static calf stretching with no stretching, grouped by stretching time21:

Dorsiflexion gained (degrees)15 minutes or less2.1 More than 15 to 30 minutes3.0 More than 30 minutes2.5
Dorsiflexion gained (degrees). Bars start at zero; the table below gives each value with its source.
Stretching time in the five trialsDorsiflexion gained (degrees)
15 minutes or lessAbout 2.121
More than 15 to 30 minutesAbout 3.021
More than 30 minutesAbout 2.521

Two studies used 30-minute sessions on a stretching board: six 5-minute sets, twice a week for 5 weeks38,39. In 15 males, this significantly changed dorsiflexion range and medial gastrocnemius stiffness38. In 16 healthy young men who stretched one leg, plantar flexor strength in that leg rose by about 6 to 8%39. No measure of their muscle architecture, how a muscle’s fibres are arranged, changed significantly39.

In 70 active participants, one leg’s calf was stretched continuously for 1 or 2 hours a day, 7 days a week, for 6 weeks40. Maximal plantar flexor strength in that leg rose 14.2% and 22.3%, against 1.9% in controls40. The 1-hour and 2-hour groups did not differ significantly40.

Stretching harder

One trial randomly allocated 40 healthy young men to high-intensity or low-intensity static calf stretching, or to no stretching36. The stretching groups did three 60-second sets, 3 times a week for 4 weeks36. Intensity was changed between and within sessions by adjusting the angle of a stretching board36. The high-intensity group gained more range, 40% against 15%, and lost more muscle stiffness, 57% against 24%36.

Neither stretching group showed a significant change in strength, muscle architecture or drop jump height36. A drop jump is a jump straight up done right after landing from a box. In the 5-week board study of 15 males, intensity was the greatest dorsiflexion angle each person tolerated38. Those who could go past the board’s 35-degree limit kept up the intensity by moving their body weight forward38.

Longer holds over 12 weeks

One study of 21 female adolescent volleyball players lengthened the holds as it went37. They stretched the calf of one leg five times a week for 12 weeks, in two sets of six holds37. Holds started at 45 seconds and grew by 15 seconds every 3 weeks37. Session time rose from 540 to 900 seconds37.

Each hold went to near the point of discomfort, 8 to 9 on a 0 to 10 scale37. In the last 3 weeks, the players kept up the intensity by moving their body weight forward37. Alongside volleyball training, dorsiflexion rose in both legs, more in the stretched leg (22%) than the unstretched one (8%)37. No stretching-associated injury was reported37.

After stopping

Two of these studies followed people after they stopped stretching37,38. Detraining is the loss of training gains when training stops or falls too low. In the 15 males, the changes in range and medial gastrocnemius stiffness returned to baseline after 5 weeks without stretching38. In the 21 volleyball players, changes in ankle angle, fascicle length and gastrocnemius cross-sectional area were kept after 3 weeks off37. Cross-sectional area is the size of a slice cut straight across a muscle.

Connections

The muscles, tendon and joint

One study of runners used a straight-knee gastrocnemius stretch and a bent-knee soleus stretch11. Both muscles and the Achilles tendon were stiffer with the knee straight, in 20 healthy people15. In one study, the stretch took the ankle joint into dorsiflexion6. In one study of the calf raise, the soleus worked at similar lengths standing and seated, and the gastrocnemius heads at longer lengths standing41.

Ankle range and the knee

Some studies link low dorsiflexion range or less flexible calves with knee problems42,43:

  • In 30 people with patellofemoral pain, pain around or behind the kneecap, and 30 matched controls, the pain group had less flexible gastrocnemius and soleus42.
  • In 113 volleyball players, reduced dorsiflexion range was the one measured factor linked with patellar tendinopathy, pain in the patellar tendon with loading43.
  • A systematic review of 31 studies in athletes found limited or conflicting evidence that reduced dorsiflexion is a possible changeable risk factor for patellar tendinopathy44.
  • For the drop landing, a systematic review of 6 studies found landing changes when dorsiflexion is restricted, though the studies disagree on which measures change45.

Injury in army recruits

In 1,093 male army recruits over 12 weeks of training, dorsiflexion range measured beforehand strongly predicted injury5. In the same study, calf stretching before hard exercise, compared with upper-limb stretching, showed no definite effect on injury risk5. The authors noted the study may have been too small to detect one5.

Calf stretch stretches

Calf stretch loads

Calf stretch stretches muscles found less flexible in

Calf stretch works the ankle range studied in

Calf stretch stretches the muscles worked by

Calf stretch works the ankle range used in

Calf stretch is progressed by

Sources

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Every source the library cites

Changes

  • Added a Progressive overload section.
  • Revised. Corrects a statement that the gastrocnemius is the only lower-leg muscle crossing both the knee and the ankle.
  • A supporting claim was narrowed to match its source; the page text is unchanged.