Common, usually minor, and a small share of rugby injuriesEmerging evidence
The NHS says back pain "usually improves within a few weeks but can sometimes last longer or keep coming back". In English community rugby, counting injuries that kept players out for 8 days or more, the knee, shoulder, head, ankle and thigh led, the neck was ninth and the lower back wasn't among the top 10 sites.
In two seasons of the English Premiership (546 professional men), spinal injuries ran at 10.9 per 1,000 match hours and 0.37 per 1,000 training hours, and "Overall, players were more likely to sustain a cervical injury during matches and a lumbar injury during training". Lumbar (low back) injuries cost about 13 days in matches and 26 in training on average. In professional training, "Twenty two per cent of all training occurred during the preseason but 34% of all injuries were sustained in this period". Grassroots adult rugby has been studied less.
Sources 1, 2, 3, 4, 5
Scrums, rucks, tackles, lifting and the gymEmerging evidence
"During matches, more injuries were caused by tackles (37%), and during training more injuries were caused by weight-training (33%)" in professionals, and "The ruck and maul elements of the game caused most injuries to forwards, and being tackled caused most injuries to backs". Lumbar disc and nerve root injuries were among the commonest training injuries for professional forwards.
A University of Bath and RFU review of the scrum: "the incidence of acute injury associated with scrummaging is moderate but the risk per event is high". The forces are large and depend on how packs come together: "peak compression (horizontal) forces in the professional teams changed from 16.5 (baseline technique) to 8.6 kN (fold-in procedure)", and in live scrums binding before the hit (the crouch, bind, set sequence now in law) cut the peak stresses on front rows by 14% to 25% without weakening the push. In 29 hookers, "Engagement sequence had no effect on resultant kinematics of any spinal region". These studies measure load, not injury: no study has followed scrum load or lineout lifting and found it causes low back pain.
Across sport, "A previous episode of LBP, high training volume, periods of load increase and years of exposure are common risk factors" (LBP is low back pain). In teenage athletes, sport volume or intensity, pain in the legs, older age and being a girl went with back pain.
Sources 3, 5, 4, 6, 7, 8, 9, 10, 11
Young players: the stress fracture of the lower spineEmerging evidence
Spondylolysis is a crack, usually a stress fracture, in the thin bridge of bone at the back of a vertebra, most often the fifth in the low back. The American Academy of Orthopaedic Surgeons (AAOS) says "Spondylolysis is a weakness or stress fracture in one of the vertebrae, the small bones that make up the spinal column", and the NHS says a stress fracture is "more common in young athletes and gymnasts".
In 327 Japanese schoolboys X-rayed before they started, back pain over a year was common whatever the X-ray showed, but 72.5% of those with spondylolysis had pain, so "a radiographic abnormality, specifically spondylolysis, is a significant radiological risk factor for low back pain in high school rugby players". In one cohort of 185 Japanese teenage boys followed for a season, 25 had a lower back injury, and "The 18 players (72.0%) who reported injuries of the lower back were diagnosed with spondylolysis". That figure comes from one cohort of boys; in a US hospital sports clinic, 30% of 1,025 teenage athletes with back pain had spondylolysis. These are cohorts and clinic samples: they show a link, not that rugby causes the fracture.
Sources 12, 13, 14, 15, 16, 11
The neck: the rare serious causeEmerging evidence
Catastrophic injury in rugby, such as a serious spinal injury, is rare, and the rate differs by country. One review put it at 0.8 per 100,000 players a year in England, 0.9 in Ireland, 1.9 in Argentina, about 4 in New Zealand and Australia and 13 in Fiji, with rugby league at about 2 per 100,000; in union, the risk "was generally lower than or comparable with the levels reported for a wide range of other collision sports". In France, catastrophic neck injuries fell from 2.1 to 1.4 per 100,000 players a year, and in South Africa permanent spinal cord injury ran at 0.24 per 100,000 a year in juniors and 4.52 in seniors.
In union the scrum, and in league the tackle, are the commonest causes: in New South Wales, "The most common causes of injury were scrums for rugby union (35%) and tackles for rugby league (78%)", and hookers carry most of the scrum risk. Since the 1990s a growing share has come from the tackle, and most happened early in the season. The usual mechanism is a head-first impact that buckles the neck: "Facet dislocations, in particular bilateral facet dislocations, were identified as the most common types of cervical spine injury in rugby".
Sources 17, 18, 19, 20, 21, 22, 23
Stiff necks in front-row forwards, and backs after a careerEmerging evidence
In 47 front-row players and 40 other men, "Front-line rugby players showed more early degenerative alterations on magnetic resonance imaging scans than did the control subjects of the same age" (degenerative alterations are signs of wear), but in 14 professional front-row players with more change on X-ray, "Despite these findings the rugby players did not exhibit increased symptoms". Retired French professionals reported chronic neck pain more often than other men (51 of 101 against 27 of 85), with similar pain scores in those who had it.
Back pain is common in former athletes of every kind: 80% of former elite and 75% of former amateur rugby players reported current back pain, against 69% of former non-contact athletes, and "It is unclear if the high prevalence of back pain in former rugby code players is related to vertebral injuries during their playing career".
Sources 24, 25, 26, 27
When a scan matters, and what changes on scans meanStrong evidence
Most back pain after rugby needs no scan. The National Institute for Health and Care Excellence (NICE) says "Do not routinely offer imaging in a non-specialist setting for people with low back pain with or without sciatica", and "Imaging findings of spine degeneration are present in high proportions of asymptomatic individuals, increasing with age". Disc changes were common on neck scans of professional players without symptoms, too.
A young player with a suspected stress fracture is different: the NHS says the GP may arrange an X-ray, and other scans such as a magnetic resonance imaging (MRI) scan if there is pain, numbness or weakness in the legs, and the 2026 trial confirmed active spondylolysis on MRI. After a neck injury, NICE's spinal injury guideline decides who is scanned, using a rule whose high-risk factors include a "dangerous mechanism of injury" such as a blow to the top of the head.
Sources 28, 29, 30, 13, 31, 32, 33
What usually happensEmerging evidence
In 33 groups of people with recent low back pain, "Patients who presented with acute or persistent low-back pain improved markedly in the first six weeks". The Chartered Society of Physiotherapy (CSP) says back pain is "very common and rarely dangerous". Professional players' lumbar injuries cost 2 to 4 weeks on average.
Spondylolysis in young people: in the 2026 trial, physiotherapy straight away brought athletes back 38 days sooner than resting first, with fewer recurrences over 12 months (3% against 29%), and a 3-month MRI showed healing in 81%. Across 11 studies, return to sport was 92.2% without surgery.
Sources 34, 35, 3, 31, 32, 36
When it isn't rugby: the causes the warning signs cover
Some back and neck pain has causes rugby didn't create, or needs more than a plan, and the warning signs follow the pages behind them. Numbness around the genitals or bottom, bladder or bowel changes or symptoms in both legs can be cauda equina syndrome, as the NHS back pain and sciatica pages say. After a collision, the UK grassroots concussion guidelines, World Rugby and the Gaelic Athletic Association (GAA) agree that only trained healthcare professionals should move a player with a suspected neck injury, and burning, tingling or weakness in both arms or the legs can be a brief injury to the spinal cord, as the stingers studies and reviews describe; NHS inform, NICE and the NHS's cervical spondylosis page set the 999 signs after a neck injury.
A fall where someone can't get up follows the NHS falls page, and a new blow to the back NHS inform's back problems page. A burst aortic aneurysm, a kidney infection, foot drop and back pain with cancer follow the NHS pages and NICE's guideline on spinal metastases, and leg weakness that is getting worse follows a Leicestershire NHS physiotherapy leaflet. A hot, swollen joint can be an infection, as the NHS septic arthritis page says, and fainting or chest pain during exercise needs a 999 call, as the NHS fainting and chest pain pages say. A young athlete's stress fracture, children's back pain, inflammatory back pain and a spinal fracture after a minor fall follow the long-term spondylolysis cohorts, two NHS children's physiotherapy services, the NHS ankylosing spondylitis page, NICE and the osteoporosis guidance. The back hub's pain rule follows the World Health Organization (WHO) guideline and a review of leg symptoms that move back towards the spine, and the young athletes' rule a review of non-surgical care and the CSP's myth busters.
Sources 1, 37, 38, 33, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 39, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97
