Boxing and striking martial arts load the shoulder through hundreds of fast punches and strikes each session, and the neck through holding a tight guard and absorbing blows. The common problems are rotator cuff irritation from bag and pad volume, a sprained AC joint at the top of the shoulder after a fall, shoulder instability after a dislocation, and neck strain. A blow to the head can cause concussion, which needs a doctor’s assessment before you train again.
Key takeaways
- Punch volume: rotator cuff pain usually follows a jump in bag, pad or sparring rounds.
- Missed punches: a punch that misses has to be slowed down by the muscles at the back of the shoulder.
- Falls and clinches: landing on the point of the shoulder can sprain the AC joint; the arm forced back and out can dislocate the shoulder.
- Neck: holding the guard with the shoulders shrugged for many rounds loads the neck muscles.
- Concussion: headache, dizziness, confusion or memory gaps after a blow to the head mean stopping training and seeing a doctor.
Common problems by body part
- Rotator cuff: an ache at the outer upper arm after rounds on the bag, worse reaching overhead or lying on that side. This is usually rotator cuff tendinopathy, a load problem that builds over weeks. Hooks and uppercuts, and punches thrown at full reach, add to it.
- AC joint: pain on the bony point at the top of the shoulder after landing on it during a takedown, sweep or fall. Reaching across the body hurts, and there may be a bump. See separated shoulder (AC joint sprain).
- Instability: the shoulder slips partly or fully out when the arm is forced back and out, in a clinch, a throw or a fall. Afterward, the shoulder may feel loose when you throw a long punch. Recovery is covered in dislocated shoulder recovery.
- Neck strain: stiffness and aching at the base of the neck after sparring, from a guard held with the chin tucked and shoulders shrugged, from blows to the head, or from a clinch where the head is pulled down.
- Stinger (burner): a sudden burning or electric pain down one arm after a blow to the head, neck or shoulder, often with brief weakness. It usually fades within seconds to minutes. It comes from a stretched or compressed nerve in the nerves running from the neck to the arm.
Early warning signs
- Pain the morning after bag work: the shoulder is not recovering between sessions.
- Pain at full reach: the jab or cross hurts at the end of the punch.
- A loose or slipping feeling: especially with the arm out to the side and back.
- A neck that stays stiff for days after sparring: rather than settling within a day or two.
Load and technique changes
- Build rounds gradually: add one or two rounds of bag or pad work a week, rather than doubling volume before a fight or grading.
- Mix heavy and light days: follow a hard bag or sparring day with technique, footwork or conditioning that spares the shoulders.
- Control missed punches: in shadowboxing and drills, stop short of a snapping lockout and bring the hand straight back to the guard.
- Relax the guard between exchanges: keep the chin down, but drop the shoulders when you are out of range and between rounds.
- Strengthen: rotator cuff, shoulder blade and neck strengthening two to three times a week. Strength changes usually take 6 to 12 weeks to build.
A punch that misses still has to be stopped, and the back of the shoulder does the stopping.
Keep going or ease back
- Ache after sessions that settles by the next day: cut bag and pad rounds by about half for 1 to 2 weeks and keep technical work.
- Pain during punching or into the next day: stop bag work and sparring, keep shadowboxing at a pace that does not hurt, and see a physical therapist. Ask what is irritated and how to rebuild punch volume.
- After a dislocation: contact sparring usually waits until range and strength match the other side, which often takes 3 months or more. Your doctor or surgeon may advise a different timeline. Use theirs.
- After an AC joint sprain: mild sprains often take 2 to 6 weeks before full training; more severe sprains can take 3 months or more.
- After a concussion: no sparring or contact until a doctor clears you, followed by a step-by-step return over at least a week once symptoms have gone.
Where else this could be coming from
- Pinched nerve: a pinched nerve in the neck also sends pain down the arm, but it lasts for days or weeks rather than minutes, and often follows a pattern into particular fingers.
- Neck referral: shoulder pain that comes from the neck changes with neck movement and leaves shoulder movement free.
- Labrum: a labral tear gives a deep ache with catching or clunking, often after a dislocation or a fall on the arm.
- Ground work: if your training includes takedowns, chokes and joint locks, BJJ and grappling injuries covers the neck and shoulder problems specific to the ground.
Call your local emergency number or go to the emergency department if
- Neck injury with nerve signs: severe neck pain after a blow or fall, or numbness, tingling or weakness in both arms or in the legs. Keep the person still until help arrives.
- Head injury danger signs: loss of consciousness, a seizure, repeated vomiting, a headache that keeps worsening, increasing confusion or drowsiness, or slurred speech.
- Shoulder out of place: a shoulder that looks deformed and will not move after a fall or clinch, especially with a numb or cold arm.
See a doctor today if
- Possible concussion: headache, dizziness, nausea, blurred vision, sensitivity to light, or feeling foggy after a blow to the head.
- Arm symptoms that do not fade: burning, numbness or weakness in the arm that lasts more than a few minutes, or appears in both arms.
- Top-of-shoulder injury: a new bump with severe pain on the point of the shoulder after a fall.
Get it checked soon if
- A shoulder that slipped and went back: even if it moves well afterward.
- Repeated stingers: more than one episode, even if each one fades.
- Persistent pain: shoulder or neck pain that has not eased after 2 weeks of reduced training.
More on this area: neck and shoulder pain by job and sport.
Most striking-sport shoulder pain is easier to manage when punch volume changes before pain forces a break.
Written by Louise Yow, Neck & Shoulder Physio.