What nobody has countedEmerging evidence
No study counts shoulder pain from the rowing machine in gym-goers or class users. In rowers, the lower back leads. In 743 masters rowers, the low back took 32.6% of injuries, the knee 14.2%, and the shoulder and upper arm 10.6%; more than 85% used the rowing machine, but only 5 of 359 sudden injuries happened on it. In 207 young rowers, the shoulder was 11.9% of pain reports. In elite juniors and seniors the shoulder isn't among the three commonest sites, and in Australia's national team the lower back and the chest wall led.
In high-intensity class formats, the shoulder ties with the back as the commonest injury site (26% of injuries each, across 28 studies), but those injuries aren't tied to the rowing machine. At the 2023 World Rowing Indoor Championships, 44% of 180 competitors reported an injury in the month before, mostly from overuse, but the summary gives no body regions. These figures come from masters, elite and young rowers and class users, not gym-goers on the rowing machine, so this page's map is built from lab studies of the stroke, rowing injury surveys, British Rowing's guidance, trials of rotator cuff pain and NHS pages, and it says so.
Sources 1, 2, 3, 4, 5, 6, 7
What the rowing machine asks of the shoulderEmerging evidence
The stroke starts at the catch, arms long and shoulders reaching forward; then the legs drive, the body swings back, and the arms finish by drawing the handle to the lower ribs, as British Rowing teaches. A review by shoulder surgeons explains that the force from the legs and back passes to the handle through the shoulders, steadied by the large back muscle (latissimus dorsi) and the muscle that holds the shoulder blade to the ribs (serratus anterior). Pulling harder turns up almost every muscle without changing their order: activity rose with power in 22 of 23 muscles in 15 people. In 58 elite rowers, the shoulders and trunk moved through a bigger range at higher stroke rates. No study has recorded the rotator cuff during rowing.
Sources 8, 9, 10, 11, 12
Tiredness, hard pieces and more sessionsEmerging evidence
In 10 men rowing 2,000 metres all out, the upper back rounded as they tired, and the large back muscle, the upper trapezius and the back of the shoulder showed signs of fatigue. In 9 people rowing to exhaustion, a shoulder blade muscle (the middle trapezius) worked harder as fatigue built. In 9 international rowers, the upper trapezius, the large back muscle and the biceps worked harder over 1,000 metres on the machine than on water. In 20 elite rowers, rowing machine training load was the training factor most linked with injury, and in 160 UK club rowers, more training went with more injuries. Our reading: hard pieces, a jump in sessions and tired technique late in a piece are what a sore shoulder notices.
Sources 13, 14, 15, 16, 17
Grip, handle, damper and stroke rateEmerging evidence
British Rowing teaches a loose overhand grip, shoulders relaxed, back and down, no movement in the back or shoulders until the legs are nearly straight, and straight wrists as the handle comes in, drawn in a straight line to the breastbone or bottom rib, not the stomach or shoulders. A coaching article in its magazine says gripping too tightly makes blisters and calluses worse. A higher damper means more force on every pull, and British Rowing keeps the setting low. Stroke rate is less simple: at the same pace, a higher stroke rate means less load on each pull, so a lower rate eases the shoulder only if the pace or power drops with it. British Rowing recommends lower rates of 18 to 24 strokes a minute from time to time, for practising technique.
None of this has been tested against shoulder pain. No source we found tells indoor rowers how wide to keep their elbows; on water, the finish is described with the elbows bent into the body at waist height.
Sources 8, 9, 18, 19, 10
How the causes are told apartEmerging evidence
The front or outside of the shoulder and upper arm, worse at the finish or reaching forward, sometimes at night, is usually rotator cuff related shoulder pain, often called impingement; the UK shoulder surgeons' pathway says it is usually self-limiting and most symptoms respond within three months. A tender spot at the front at the top of the arm can be the long head of the biceps tendon, which often travels with rotator cuff problems. Pain on top at the end of the collarbone is the AC joint; AC joint changes showed on 70% of MRI scans of shoulders without pain, so a scan report has to match the story.
An ache along or under the shoulder blade, or between the shoulder blades, through long pieces is usually the shoulder blade and upper back muscles tiring, but shoulder blade pain can come from a trapped nerve in the neck, sometimes weeks before arm pain, and NHS inform says neck problems can cause pain in the shoulders, arms and upper back. Shrugging into the top of the shoulder and neck is the upper trapezius; British Rowing's coaches want the body weight to hang through the handle, not in the shoulders. Pins and needles, burning or numbness down the arm is a nerve in the neck (cervical radiculopathy).
Side-of-chest pain around the middle ribs, building over weeks and sharp on breathing in, in someone rowing a lot, can be a rib stress injury: mostly at the side of the chest around the sixth rib, in 8.1% to 16.4% of elite rowers, 2% of university rowers and 1% of junior elite rowers. Sudden weakness lifting the arm after a jerk or a fall can be a rotator cuff tear, which an NHS policy sends straight to hospital care. A shoulder painful and stiff in every direction for months is frozen shoulder, and a hot, swollen, red shoulder with a temperature can be a joint infection, which needs checking straight away. Pain or tightness in the chest, neck, shoulders, jaw or arms that comes on with the effort and eases with rest can be angina; British Rowing issued a safety alert after three heart rhythm problems on rowing machines in five months.
Sources 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34
When a scan helps, and how it usually goesStrong evidence
Not usually at first. The UK pathway keeps imaging for pain that won't settle, with an X-ray after an injury, and puts ultrasound as a good first scan in experienced hands. Rotator cuff changes rise from 9.7% at 20 and under to 62% at 80 and over, with or without pain, which the authors called a common part of normal ageing. Tests matter after an injury with sudden weakness (an X-ray and urgent ultrasound), for a hot, swollen shoulder, for arm symptoms from the neck, and for side-of-chest pain that builds with rowing.
In 349 people with new shoulder pain in general practice, 23% had fully recovered at a month and 59% at a year, quicker after overuse or a slight injury and when seen early. The UK pathway expects most rotator cuff related pain to respond within three months, and the NHS says shoulder pain can take 6 months or longer to recover and asks for medical help if it isn't starting to feel better after 2 weeks. Rib stress injuries cost elite rowers a median of 57 to 69 days of full training; older reports give 4 to 6 weeks. No one can promise a date.
Sources 20, 35, 30, 36, 21, 28, 37
