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Quadriceps contusion

Also called thigh contusion, thigh haematoma, quadriceps haematoma, Charley horse, dead leg

A bruise of the front thigh muscles from a direct blow. How reviews define and grade it, which sports have counted it, how long players were out, and how often bone formed in the muscle afterwards.

Region
Thigh
Muscles
vastus intermedius, vastus lateralis, vastus medialis, rectus femoris
Updated
October 22, 2026
Reviewed
October 22, 2026 · how entries are checked

What it is

How reviews define it

A contusion is a bruise. A 2010 review says a quadriceps contusion is usually caused by a direct blow to the muscle1. The blow tears muscle fibres at or next to the point of impact1. This typically leads to bleeding inside the muscle, with pain and loss of motion1. The same review says athletes usually recall a clear cause, often a knee from an opponent or a piece of equipment1.

A 2022 narrative review (a summary written without a set, checkable search method) covered front-thigh injuries in soccer players9. It says many are direct contusions from tackles or other collisions, also known as “Charley horse” and “dead leg”9. In these injuries the pain sits where the blow landed9. The review says severity depends on the energy and surface of the impact, and whether the muscle was tight or relaxed9.

Where it sits among muscle injuries

The 2013 Munich consensus statement, a report setting out what an expert panel agreed, classes muscle contusions as acute direct injuries10. It keeps them separate from the indirect injuries in its main classification10. A 2023 review draws the same line: strains come without contact, while contusions and cuts come from an outside impact11. Strains have their own page, muscle strain.

Which muscles are hurt

The quadriceps is a group of four muscles at the front of the thigh12. The rectus femoris sits at the front, the vastus lateralis on the outer side and the vastus medialis on the inner side12. The vastus intermedius lies between those two vasti, deep to the rectus femoris12.

The 2022 review says the three vasti, the intermedius, lateralis and medialis, are the muscles most often hurt by direct front-thigh contusions9.

Three views of the right hip bone, thigh bone and kneecap with the four front thigh muscles drawn on them. From the front, a slim blue muscle runs down the middle of the thigh from the hip bone to the kneecap, with orange muscles on either side of it. In the second view the blue muscle is removed, showing an orange muscle lying on the front of the thigh bone between two pale pink ones. From the outer side, a large orange muscle covers most of the side of the thigh above the knee.
The four quadriceps muscles of the right thigh, with the three vasti in orangeRendered by Your Basic Trainer from the Open 3D Model by AnatomyTOOL, which builds on Z-Anatomy and BodyParts3D (Database Center for Life Science). (source, CC BY-SA 4.0). Rendered from the 3D model in three labelled views with only the hip bone, thigh bone, kneecap and the four quadriceps muscles shown; the three vasti coloured orange and the rectus femoris blue in the front view, the rectus femoris hidden and the vastus intermedius orange in the deep-layer view, and the vastus lateralis orange in the outer-side view

How it is graded

The 2010 review gives a grading adapted from Jackson and Feagin1. It rests on how far the person can bend the knee unaided, and on how they walk1.

GradeKnee flexion (bending) reachedWalking
MildMore than 90 degrees1Normal1
Moderate45 to 90 degrees1With a limp1
SevereLess than 45 degrees1With a severe limp1

One case series, a report on a group of patients with no comparison group, followed seven people13. In it, the grade did not consistently estimate return to play13.

Who it affects

Sports that have counted it

The 2010 review says that, after strains, contusions are the most often reported kind of quadriceps injury in sport1.

Group studiedWhat was found
546 professional players at 12 clubs in rugby union’s English Premiership, over two seasonsThigh haematomas were the most common match injury for forwards and for backs2
78 players in one national rugby union team, over 3 yearsQuadriceps haematomas were the most common match injury, at 18.8 per 1000 match-hours3
Four Welsh professional regional rugby union teams, 2012 to 2016Front-thigh haematomas in matches fell from 8.2 to 2.4 per 1000 hours14
1981 elite men’s football players in 30 teams, 2001 to 201312% of thigh muscle injuries were contusions, at 0.19 per 1000 hours against 1.48 for indirect injuries4
320 players at five amateur Australian football clubs, 1999 seasonThigh haematomas were the second most common injury, after hamstring strains15
NBA players, 2015 to 202085 of 116 quadriceps muscle injuries (73.3%) were contusions16

In the elite football study, 76% of contusions happened in matches, and foul play was involved in 42% of them4. In a study of 60 people with quadriceps haematomas, all were aged 15 to 25, and 36 were hurt playing rugby17.

Playing surface and thigh padding

At two UK professional rugby union clubs, 157 players were followed over 209 matches18. Thigh haematomas were more frequent on artificial surfaces than on grass, with a rate ratio (one rate divided by the other) of 2.2518.

The 2010 review says better protective gear seems to be lowering how often these bruises happen, but no research supports this trend1. A 2013 review of Australian football injuries reports evidence that thigh pads can lower how often thigh haematomas happen19.

One season-long study compared two elite under-18 Australian football teams20. The team without thigh protectors had nine thigh haematomas, and the team wearing them had none20. Two players in the team without protectors tore a quadriceps within four weeks of a haematoma20. The protectors were uncomfortable in hot conditions20.

What studies found

How long people were out

  • Elite men’s football, 30 teams: a mean of 7 days for contusions, against 18.5 days for indirect thigh injuries4.
  • West Point cadets, 117 contusions: an average of 13 days for mild, 19 for moderate and 21 for severe contusions5.
  • NBA players, 2015 to 2020: a median of two games missed across quadriceps muscle injuries, most of them contusions16.
  • 60 people with quadriceps haematomas: the 40 with jobs spent an average of four weeks off work17.

For direct thigh blows, the 2022 review’s outlook is 2 to 5 days when mild, and 20 to 25 days or more when severe9.

When bone forms in the bruise

The 2010 review describes myositis ossificans as a non-cancerous growth of bone and cartilage where a severe quadriceps bruise was1. It gives a reported rate of 9 to 17% after contusions1. In the study of 60 people with haematomas, 10 developed heterotopic ossification, bone forming in soft tissue17. Attempts to predict which haematomas would turn to bone were unsuccessful17.

In the West Point cadets, myositis ossificans was associated with five factors5:

  • knee motion under 120 degrees5;
  • injury during football5;
  • an earlier quadriceps injury5;
  • a delay of more than 3 days before care5;
  • an effusion (fluid build-up) in the knee on the same side5.

The 2022 review says the cause is not known with certainty, but that the risk is greater after large contusions than small ones9.

A 2021 review divides the condition after injury into three phases22. No calcification (calcium build-up) shows on X-ray in the first four weeks; it appears between weeks four and eight22. A mature phase follows, and after several months the calcification usually firms up and finally dissolves22.

In a radiology series of 68 cases from a UK centre, 73% were in lower-limb muscles, most of them in the quadriceps23. Of the 27 quadriceps cases, the vastus intermedius had 12 and the vastus lateralis 723. The vastus medialis had 6, and the rectus femoris 223. The authors describe the condition as generally self-limiting, with the growth often shrinking within 1 to 2 years23.

A 2018 review of myositis ossificans in sport reports that most people do well without surgery24. It says athletes typically return to light activity by 2 to 3 months24. Full activity typically follows by 6 months, and their earlier level by 1 year24.

In 32 athletes who had a mature growth removed by surgery, mostly from a thigh muscle, 81% had a good or excellent outcome25. Of the 32, 30 regained their pre-injury activity level25. A 2021 review says delaying surgery until the growth has matured is preferred, though conclusive data supporting the delay are lacking22.

Pressure in the thigh

A 2013 review of thigh contusion names myositis ossificans and compartment syndrome as complications to consider26. Compartment syndrome is a rise in pressure inside a closed space of muscle, wrapped by tough tissue and bone, which limits blood flow there. A systematic review of 9 case series, 89 patients in all, studied it in the thigh27. Blunt trauma was the most common cause (90%), motor vehicle accidents made up 36%, and the authors called the data limited27.

Studies of what was done after the injury

A 2016 narrative review of muscle injuries in football says current care principles have no firm scientific basis6. It says they are largely based on experience, because randomised studies that follow people forward in time are lacking6. An appraisal of a 2004 review of 22 randomised trials of ice for soft-tissue injury found none studied muscle contusions28.

StudyWhat was doneWhat was found
117 West Point cadetsThe injured leg was rested with the knee bent rather than straight5Time out by grade is listed above; myositis ossificans in 9%5
47 US Naval Academy midshipmen, case seriesThe knee was held bent to 120 degrees for 24 hours straight after the injury7Full activity without limits after an average of 3.5 days (2 to 5)7; one case of myositis ossificans in the first 23 X-rayed7
40 athletes with thigh or calf bruises or strains, not randomisedA maximum compression bandage within 5 minutes, against no immediate compression8No significant reduction in haematoma size or time to full recovery8

The Naval Academy series had no control group, and compared its result with reports from other studies7.

A 2023 single-blind randomised trial, in which one party did not know who was in which group, enrolled 46 healthy people29. A tennis-ball serving machine struck each person’s rectus femoris, and groups wore an active or a placebo (dummy) red and blue light patch29. The active group had greater quadriceps peak torque (the greatest turning force a muscle produces about a joint) at one test speed29. It also had greater average power than the placebo group29. Two of the trial’s four authors list CareWear Corp, the maker of the patch tested, as their affiliation29.

Shock wave therapy aims pulses of sound energy at tissue from outside the body. A 2023 systematic review of it in muscle injuries covered eight studies of 143 adults30. Its contusion data came from three male professional football players in one retrospective study30. The authors concluded that higher-quality studies are needed30.

Connections

The bruise sits in the quadriceps, the group that straightens the knee through the kneecap and patellar ligament12.

A contusion is a direct injury, and the muscle strain page covers the indirect, non-contact kind11. How muscle repairs itself is on the muscle tissue page. A review describes three phases of repair31. They are breakdown with inflammation, regrowth as satellite cells (stem cells on muscle fibres) multiply, and maturing of the new fibres31. It says severe muscle injuries form scar tissue that impairs how the muscle works31.

Quadriceps contusion involves

Quadriceps contusion is one kind of injury to

Quadriceps contusion is classed as a direct injury, apart from

Sources

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Every source the library cites

Changes

  • First published.