Wall sit

Movement

Held or moving

Several studies here tested the wall sit as an isometric hold, a contraction in which the muscle works but the joint does not move^2,6. Studies also call the position a wall squat⁶. Some of them measured a hold⁸.

The versions studies have used

The studies on this page tested the wall sit in several forms^1,2,4,6,8,9:

• A 90-second wall sit, one of five static exercises compared for fatigue².
• A 2-minute hold at knee angles from 135 down to 90 degrees⁶.
• A 3-second hold at about 90 degrees of knee bend, with a Swiss ball (large exercise ball) behind the lower back⁹.
• A static single-leg wall squat held for 5 seconds⁸.
• A single-leg wall squat, one of five one-leg exercises that bear weight¹.
• Wall squats with the feet closer to or farther from the wall⁴.

What it loads

The front thigh muscles

The quadriceps, the four muscles on the front of the thigh, straighten the knee³. The rectus femoris sits at the front, with the vastus lateralis on the outer side³. The vastus medialis lies on the inner side, and the vastus intermedius between the two³. Acting through the patella (kneecap), the group is a powerful straightener of the knee³. The rectus femoris is the one quadriceps muscle that crosses two joints, so it also bends the hip¹⁰.

In 18 people, a model estimated quadriceps force across two wall squat versions and a one-leg squat⁴. Across those three exercises together, quadriceps force ranged from about 30 to 720 N (newtons, a unit of force)⁴.

A second study compared the wall squat with a Spanish squat⁹. A Spanish squat is a squat held with a strap looped behind the knees. In 22 active men aged 20 to 30, each squat was held for 3 seconds at about 90 degrees of knee bend⁹. Rectus femoris and vastus lateralis activity was lower in the wall squat than in the Spanish squat⁹. This wall squat had a Swiss ball behind the lower back⁹.

The buttock muscles

The gluteus maximus is the large muscle of the buttock³. It is aligned to extend the hip, moving the thigh backward, and to turn the hip outward¹¹. The gluteus medius, a buttock muscle, lies beneath the gluteus maximus³.

In 23 healthy adults, the single-leg wall squat produced the highest activity of the five one-leg exercises tested¹. That held for four muscles¹:

• The gluteus maximus¹.
• The gluteus medius¹.
• The vastus medialis oblique (the lowest fibres of the vastus medialis, just above the kneecap on the inner side)¹.
• The biceps femoris (one of the hamstring muscles, on the outer side of the back of the thigh)^1,3.

The authors judged three of these muscles active enough for strengthening¹. The biceps femoris did not reach that level¹.

Three parts of the gluteus medius

A different study measured three parts of the gluteus medius during a static single-leg wall squat⁸. Fifteen pain-free people held it for 5 seconds⁸. Activity was given as a share of maximum voluntary isometric contraction, the hardest effort a person can make with a muscle⁸. Of the three weight-bearing exercises tested, the wall squat was the least demanding⁸:

Part of the gluteus medius	Mean activity (approximate), % of maximum effort
Front	138
Middle	258
Back	358

In one study of 24 healthy 18- to 21-year-olds, five static exercises were each held for 90 seconds². The authors suggest the wall sit and a single-leg knee raise fatigued three muscles most reliably². These were the rectus femoris and two buttock muscles, the gluteus maximus and the gluteus medius².

The back thigh muscles

The hamstrings are three long muscles: the biceps femoris, the semitendinosus and the semimembranosus³. The back thigh muscles bend the knee and help extend the hip³. The quadriceps and hamstrings act against each other at the knee³.

In the modelling study of 18 people, hamstring force ranged from about 15 to 190 N⁴. That range, like the quadriceps range, covers two wall squats and a one-leg squat together⁴.

A ligament inside the knee

In 18 people, a model also estimated force on the posterior cruciate ligament⁴. In the wall squats, peak force came between 80 and 90 degrees of knee bend⁴:

Exercise	Average peak ligament force (approximate), N
Wall squat, feet closer	7864
Wall squat, feet farther	7234
One-leg squat	4144

Across 0 to 90 degrees of knee bend, the wall squat with the feet farther from the wall generally gave greater modelled ligament force⁴. That comparison was with the feet-closer wall squat⁴.

A narrative review, a summary of research written without a set, checkable search method, looked at loading of this ligament across common exercises⁵. It reports the ligament is less loaded at knee angles of 0 to 50 degrees⁵. From smallest to greatest load, it orders level-ground walking, the one-leg squat, lunges, the wall squat, the leg press and the two-leg squat⁵.

How the body adapts

What the studies measured

The wall-sit studies on this page measured muscle activity, fatigue, modelled force, and heart rate and blood pressure^1,2,4,6,8,9. The holds they timed ran from 3 seconds to 2 minutes^2,6,8,9.

How knee angle changes the effort

In 23 people, each held a 2-minute isometric wall squat at knee angles from 135 to 90 degrees⁶. Heart rate and blood pressure rose as the knee angle got smaller⁶. The authors conclude that changing the knee angle can adjust how hard the wall squat is⁶.

Resistance training in general

Research on resistance training in general shows how the gluteus maximus responds, though it did not single out the wall sit¹². A meta-analysis, a study that pools the results of earlier studies, looked at programmes of at least 5 weeks¹². In healthy adults aged 18 to 45, it found a moderate effect on hypertrophy (growth in muscle size) of the gluteus maximus¹².

A single case of muscle breakdown

One case report describes a healthy 16-year-old male wrestler admitted to hospital with exertional rhabdomyolysis, a breakdown of muscle brought on by exercise¹³. He had severe pain in the quadriceps of both legs¹³. It followed a preseason session of intense intervals, and wall sits were one part of it¹³. The session also included squats, sit-ups, push-ups, lunges and jumps, with running drills the next day¹³.

Progressive overload

A 2026 position stand describes progressive overload as the need to raise the stimulus on the muscle through a training programme¹⁴. The wall squat training studies in this section measured blood pressure as their result^7,15,16,17.

Deepening the knee angle

One trial in 77 unmedicated adults with hypertension (high blood pressure) used four 2-minute holds per session⁷. Over 12 weeks, the knee angle went from 125 to 95 degrees, one 10-degree step per 3 weeks⁷. People who could not hold 95 degrees for 2 minutes at the start began at 135 degrees⁷.

After 12 weeks of three sessions a week, systolic blood pressure, the upper number in a reading, fell by a mean of 12.9 mmHg⁷. That fall was significantly larger than in the control group⁷. mmHg means millimetres of mercury, a unit of pressure.

Setting the angle by heart rate or by effort

In a crossover study (each person tried the options in turn) of 28 healthy men, holds were done at a personal knee angle¹⁵. That angle was set to a target of 95% of peak heart rate¹⁵. After 4 weeks of three sessions a week, resting blood pressure was lower than after the control period¹⁵. In 100 sedentary adults, the angle changed by 5 degrees if heart rate was off target for more than two sessions¹⁸.

One study of 30 adults with normal or pre-hypertensive (slightly raised) blood pressure compared two ways of setting effort¹⁶. The group set by heart rate did not change its knee angle between sessions¹⁶. The other group used a rating of perceived exertion, a score for how hard effort feels¹⁶. Its target rose from 4 in the first hold to 8.5 in the fourth¹⁶.

If the fourth hold’s rating fell outside its target zone, the next session’s squat height moved by 1 or 2 cm¹⁶. Blood pressure fell in both groups¹⁶. The size of the fall did not differ significantly between them¹⁶.

How hard the holds were

In 30 physically inactive adults, one group trained at a knee angle giving 95% of peak heart rate¹⁹. A sham group, doing a dummy version for comparison, did the same programme at an angle giving under 75%¹⁹. Resting blood pressure fell in the 95% group, compared with the sham group and a no-exercise control group¹⁹.

Number of holds

In one study, 30 older women taking medicine for hypertension did a single session of four or six 2-minute holds²⁰. Six holds lowered systolic and mean arterial blood pressure in the hour after exercise²⁰. Four holds showed no change in blood pressure²⁰.

Sessions per week and programme length

The 77-adult trial then ran a further 12 weeks of one session a week⁷. The wall squat group held a 95-degree knee angle, and no group’s blood pressure changed significantly in that phase⁷. The authors conclude the wall squat appears better than handgrip training at keeping the benefits on this small dose⁷.

In 24 unmedicated patients with high-normal blood pressure, a year of wall squats three times a week was tested¹⁷. Resting systolic and diastolic (lower-number) blood pressure fell compared with a control group¹⁷. Attendance at sessions was 77%, and no one withdrew¹⁷.

A meta-analysis pooled 40 randomised controlled trials of isometric training²¹. Its subgroup analyses suggested larger blood pressure falls in trials using wall squats three times a week for over 8 weeks²¹. A regression analysis in the same paper found no significant influencing factors²¹.

Connections

The muscles it works

• The quadriceps, on the front of the thigh^4,9.
• The gluteus maximus, the large buttock muscle^1,2.
• The gluteus medius, beneath the gluteus maximus^3,8.
• The hamstrings, at the back of the thigh^1,4.

The ligament it loads

The posterior cruciate ligament carried modelled force in wall squats, more with the feet farther from the wall across the range⁴. A narrative review ranks the wall squat’s load on this ligament above the one-leg squat’s and below the two-leg squat’s⁵.

Related exercises

In the studies here, the wall squat was compared with a one-leg squat and a Spanish squat^4,9.

Sources

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2. Dyer OL, Seeley MA, Wheatley BB (2024). Effects of static exercises on hip muscle fatigue and knee wobble assessed by surface electromyography and inertial measurement unit data.. Scientific Reports. doi:10.1038/s41598-024-61325-7 PMID 38714802
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4. Escamilla RF, Zheng N, Imamura R, Macleod TD, Edwards WB, Hreljac A, Fleisig GS, Wilk KE, Moorman CT 3rd, Andrews JR (2009). Cruciate ligament force during the wall squat and the one-leg squat.. Medicine and Science in Sports and Exercise. doi:10.1249/MSS.0b013e3181882c6d PMID 19127183
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8. O'Sullivan K, Smith SM, Sainsbury D (2010). Electromyographic analysis of the three subdivisions of gluteus medius during weight-bearing exercises.. Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology. doi:10.1186/1758-2555-2-17 PMID 20624291
9. Lee JH, Kim S, Heo J, Park DH, Chang E (2022). Differences in the muscle activities of the quadriceps femoris and hamstrings while performing various squat exercises.. BMC Sports Science, Medicine and Rehabilitation. doi:10.1186/s13102-022-00404-6 PMID 35063016
10. Begum FA, Kayani B, Chang JS, Tansey RJ, Haddad FS (2020). The management of proximal rectus femoris avulsion injuries.. EFORT Open Reviews. doi:10.1302/2058-5241.5.200055 PMID 33312709
11. Pourahmadi M, Asadi M, Dommerholt J, Yeganeh A (2020). Changes in the macroscopic morphology of hip muscles in low back pain.. Journal of Anatomy. doi:10.1111/joa.13086 PMID 31475359
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Every source the library cites

Changes

• October 23, 2026 Added a Progressive overload section.
• September 29, 2026 Added a figure showing where it sits, links to the exercise pages that load it, and tighter wording in a few places.