What a deadlift asks of the upper back, and what no study has countedEmerging evidence
The bar hangs from straight arms, so the upper back has to stay firm while the hips and legs lift. The muscles between the shoulder blades (the rhomboids and the middle trapezius) hold the shoulder blades, the lats keep the bar close to your legs, the upper trapezius holds your shoulders up at the top, and the long back muscles keep the spine's shape.
A review of 19 deadlift muscle studies found the back and thigh muscles worked hardest, but only one study recorded the trapezius. In that study of 13 football players, the middle trapezius and the mid-back muscles beside the spine worked hardest low in the pull, near the floor, and the upper trapezius near lockout.
No study has counted upper back pain or injury from deadlifts: in a review of powerlifting injury reports, the deadlift injuries were almost all in the lower back and legs. So the map on this page comes from lab studies, injury surveys, studies of the ribs, the neck and the bones, and NHS pages.
Sources 1, 2, 3
The commonest pattern, in our reading: the muscles between the shoulder blades
An ache or burn between the shoulder blades or beside the spine, building through heavy sets and easing within a day or two, is usually these muscles working hard. A sudden sharp catch on one side during a rep, then soreness for days, fits a strain of the same muscles. No study counts these causes, so this is our reading.
A dull ache across both sides the day after a new or heavier session is muscle soreness: it usually starts 12 to 24 hours after unaccustomed work, peaks between 24 and 72 hours and is gone within 5 to 7 days.
Source 4
The upper back rounds a little more near your maximumEmerging evidence
As the weight nears your maximum, the spine bends more where the upper back meets the lower back. In 13 male track and field athletes, the lower part of the upper back and the top of the lower back bent more as the load rose from 60% to 90% of their maximum. In 12 strength-trained women, the lower upper back bent more at their maximum than at 70% or 90%, and the authors suggest the bending helps lifters finish a lift heavier than their hip muscles alone could manage. Trained lifters don't hold a perfectly flat back anyway, and even elite powerlifters lifting over 180 kg kept their lower backs short of full bending.
No study links upper back rounding with upper back pain or injury. For the lower back, pooled studies of low quality found that bending while lifting wasn't a risk factor for back pain, and a 2026 review argues that sudden jumps in training load predict injury more consistently than posture. Our reading: rounding that grows rep by rep in a heavy, tired set means the weight is too heavy for now, not that you are injured.
Sources 5, 6, 7, 8, 9, 10
A catch beside the spine, and the ribsEmerging evidence
The ribs join the spine at small joints on each side. In 8 healthy men, irritating these joints gave a deep, dull ache and pressure over the joint itself, with no chest, arm or organ-like pain. So a deep, local catch beside the spine, sore on a deep breath, a twist or a cough, fits a rib joint or a strained muscle between the ribs (our reading). No study of rib joint pain in lifters was found, and there is no evidence that a rib slips out of place.
A rib stress fracture is rare. A 17-year-old broke his first rib the day after deadlifts at school, with pain at the back of the shoulder and a shoulder blade that stuck out; it settled within 2 weeks of rest. In a 26-year-old weightlifter, the first X-ray was normal and a CT (computed tomography) scan found the fracture. Rib stress fractures are best known in rowers, linked with repeated pulling and low bone density.
Sources 11, 12, 13, 14, 15
The neck can send pain between the shoulder bladesEmerging evidence
In 50 people with a trapped nerve root in the neck, pain in the neck or around the shoulder blades came before the arm symptoms in 70%, and pain between the shoulder blades pointed to the lowest neck nerves. A review of 86 studies found that shoulder blade pain can come weeks before arm pain. So pain under one shoulder blade with a stiff neck, or pins and needles that follow down the arm, belongs to the neck guides, not the deadlift.
Sources 16, 17
Thin bones: a spine fracture is rare in lifters but needs checkingStrong evidence
The NHS says that with thin bones, a cough or a sneeze can break a rib or partly collapse one of the bones of the spine. A UK consensus notes reports of spine fractures with end-range, sustained, repeated or loaded forward bending, and the Royal Osteoporosis Society says not all spinal fractures cause pain. Sudden mid or upper back pain after a modest lift from 50, past the menopause or on long-term steroid tablets, or height loss or a curved back, needs a GP.
Sources 18, 19, 20
Rare but serious: the heart and the lungsStrong evidence
Upper back pain is rarely the heart or the lungs, but they come first. The NHS makes chest pain that spreads to your arm, neck, jaw, stomach or back a 999 call (its heart attack page describes crushing or squeezing chest pain that may spread to the arm, neck and jaw), and lists pain in your chest or upper back among the signs of a blood clot in the lungs. It also says see a GP for back pain coming from the top of your back, between your shoulders, rather than your lower back.
Sources 21, 22, 23, 24
Who gets itEmerging evidence
No study counts upper back pain from deadlifts. In weightlifting and powerlifting studies that reported it, the upper back and neck together made up 1.7% to 14.7% of injuries; the lower back and the shoulder led. In 104 Swedish powerlifters, women had more neck and upper back injuries than men, and female powerlifters report more upper back and neck pain, men more low back pain. Injury rates in lifting are low next to contact sports, and most injuries are strains and sprains. Upper back pain is common in everyone too: 15% to 27.5% of people have it over a year.
In our reading it mostly bothers people who add weight or sets quickly, grind heavy reps when tired, go back to an old working weight after a break, hold long, heavy sets with straps, or come to the bar with an upper back already sore from desk work.
Sources 25, 26, 7, 27, 28, 29
When a scan or test matters
Not for an ache between the shoulder blades that eases with a lighter, closer pull. Tests matter with the warning signs (an electrocardiogram (ECG) and blood tests for chest pain), after a fall or a dropped bar, for a rib that hurts more with each session (a first X-ray can be normal), for sudden back pain after a lift from 50 or with thin bones, and for arm weakness or numbness that is getting worse.
Sources 13, 18
How it usually goesEmerging evidence
No study follows upper back pain from deadlifts. Soreness goes within about a week, and the NHS says back pain usually improves within a few weeks but can sometimes last longer or keep coming back. In Swedish powerlifters, only 16% of those injured had to stop training completely; most changed their training instead. The teenager's rib fracture settled within 2 weeks. No one can promise a date.
Sources 4, 24, 26, 12