Shoulder Pain in Masters Swimmers: When Should You Modify Training?

Shoulder pain is common in swimming, but pain does not automatically mean you need to stop all training.

A more useful question is: what can you continue, what may need modifying and when should you get the shoulder assessed?

For Masters swimmers, that decision can be complicated by years of training history, previous injuries, current swim volume, gym work, competition plans and the realities of fitting sport around adult life.

This guide looks at shoulder pain from a performance perspective: what the research tells us, what it does not tell us, how training may sometimes be adapted and when professional or medical assessment becomes important.

How common is shoulder pain in swimmers?

Shoulder problems are common in competitive swimming, although reported prevalence varies considerably between populations and studies.

A systematic review examining swim-training volume and shoulder pain included 12 studies and 1,460 competitive swimmers. Across the different age groups studied, reported shoulder-pain prevalence ranged from 19.4% to 91.3%.^[1]

The Masters population deserves particular attention because adult swimmers may combine decades of repetitive swimming with changes in recovery, training availability, work demands and previous injury history.

In one study involving 39 Masters swimmers, 69% reported shoulder pain during strenuous activity and 50% reported disability on the study's assessment measures.^[2]

Another survey involving 88 Masters swimmers found that the shoulder was the most commonly reported painful body region, affecting 37 swimmers — 42% of the sample.^[3]

Why can swimming place so much demand on the shoulder?

Swimming involves a very high number of repeated upper-limb movements.

Across a single session, a swimmer can complete hundreds or thousands of stroke cycles. Across a week, month and season, that creates substantial repeated loading.

That does not mean repetition itself is inherently harmful. The body can adapt to training.

Problems can emerge when the total demand exceeds what the swimmer is currently prepared to tolerate.

The difficulty is that this demand is influenced by much more than simply counting metres.

Relevant considerations may include:

• Total swimming volume
• Training intensity
• Recent changes in workload
• Stroke selection
• Paddle use
• Competition frequency
• Strength-training volume
• Previous shoulder problems
• Recovery between sessions
• Individual physical characteristics

Is there one main cause of swimmer's shoulder?

No — and this is an important point.

It is tempting to reduce swimming shoulder pain to one explanation:

“Your shoulders are weak.”

“You swim too much.”

“Your mobility is poor.”

“Your technique is wrong.”

The research does not support that level of certainty.

A 2023 systematic review included 22 studies and assessed 80 proposed variables associated with shoulder pain or injury in competitive swimmers. The researchers found no strong evidence supporting or refuting an association for any of the 80 variables.^[4]

Some factors had moderate, limited or conflicting evidence, but the overall message is important:

Shoulder pain in swimmers is unlikely to be explained by one simple screening result or one universal weakness.

An earlier systematic review reached a similar conclusion, finding that although several potential risk factors had been proposed, the certainty of much of the evidence was low.^[5]

The first useful question: what changed?

When symptoms appear, one useful place to start is looking at what changed around the same time.

That change might be obvious:

• An additional swim session
• A sudden increase in weekly distance
• A block containing more sprinting
• More butterfly
• More paddles or pulling
• A new strength programme
• A large increase in upper-body gym volume
• Several competitions close together

Sometimes the change is less obvious.

Training may be almost identical, but sleep has reduced, work has become more demanding or recovery between sessions has changed.

The systematic review of 1,460 swimmers found differences in training exposure between swimmers with and without shoulder pain in the Masters group, although the authors also emphasised that better-quality research is needed before firm workload cut-offs can be established.^[1]

So rather than searching for a universal number of metres that is “safe”, it can be more useful to look at how the swimmer's recent training compares with what they were previously prepared for.

Should you stop swimming completely?

Not automatically.

Whether training should continue depends on the nature and severity of the problem.

For general shoulder pain, NHS guidance advises people to stay active and gently move the shoulder rather than completely stopping its use, while also avoiding activities that clearly make symptoms worse.^[6]

In a swimming context, that does not mean simply ignoring pain and completing the planned session.

It means there may be situations where training can be modified rather than completely removed.

Depending on the swimmer and the problem, possible modifications might involve:

• Reducing total swimming volume
• Changing stroke selection
• Reducing high-intensity work
• Temporarily removing paddles
• Reducing pulling volume
• Changing particular gym exercises
• Reducing the number of sessions temporarily

The appropriate modification depends on the individual.

What should you monitor during training?

Pain is not always a simple yes-or-no signal.

If symptoms are mild, monitoring how they behave can provide useful information.

Questions worth considering include:

• Does the pain increase as the session continues?
• Are you changing your stroke because of the pain?
• Does the shoulder settle once the session finishes?
• Is it significantly worse later that day?
• Is it worse the following morning?
• Is normal movement becoming more difficult?
• Is the problem becoming progressively worse across several sessions?

A worsening pattern deserves attention.

Can you continue training other areas?

Often, some training can remain possible even when one part of the programme needs changing.

Depending on the situation and professional advice, that might include:

• Lower-body strength work
• Trunk training
• Gym exercises that do not aggravate symptoms
• Modified swimming
• Selected technical work
• Rehabilitation exercises prescribed for the individual

This is one reason a blanket instruction to “stop everything” is not always the most useful response.

Equally, continuing every part of the programme unchanged simply because some movement remains possible is not necessarily sensible either.

The aim is to make an informed decision about what can remain and what needs adjusting.

What about strength training?

Strength training can form an important part of a swimmer's overall physical preparation, but the gym programme should also respond when shoulder symptoms develop.

Possible changes might include:

• Changing exercise selection
• Changing range of motion
• Reducing load
• Reducing sets or total volume
• Changing weekly frequency
• Temporarily removing an aggravating exercise

What is less convincing is automatically prescribing the same collection of band exercises to every swimmer with shoulder pain.

The evidence around shoulder risk factors in swimmers is too complex to justify one universal “prehab” solution.^[4]

Strength work should therefore have a reason for being there and should reflect what the individual swimmer currently needs.

When should you get shoulder pain assessed?

Persistent or worsening shoulder pain deserves appropriate assessment.

NHS guidance recommends seeking GP advice if shoulder pain is getting worse, has not started improving after around two weeks, or makes it very difficult to move the arm or shoulder.^[6]

For a swimmer, assessment may also be useful earlier when:

• The problem is significantly disrupting training
• You are unsure what activity remains appropriate
• Symptoms repeatedly worsen after swimming
• Strength or movement appears to have changed
• Previous attempts to modify training have not helped

An assessment can help move the conversation beyond simply asking “what is wrong?” and towards practical questions such as:

• What may be contributing?
• What can continue?
• What should temporarily change?
• Would rehabilitation be appropriate?
• Is referral for further assessment needed?

When should you seek urgent medical advice?

Most shoulder discomfort associated with training will not require urgent medical care.

However, the NHS advises seeking urgent help from a GP or NHS 111 for symptoms including:^[6]

• Sudden or very severe shoulder pain
• Being unable to move the arm
• The shoulder or arm changing shape or becoming badly swollen
• Pins and needles that do not go away
• Loss of feeling in the arm or shoulder
• The arm or shoulder feeling unusually hot or cold
• Pain beginning after an injury or accident such as a fall
• Severe pain in both shoulders
• Feeling feverish or generally unwell

Those situations require appropriate medical assessment rather than simply adjusting the next swim session.

Why Masters swimmers need individual decisions

“Masters swimmer” covers an enormous range of athletes.

One swimmer may be 30 and have trained continuously since childhood.

Another may be 55 and returning after two decades away from structured swimming.

Another may have years of Masters competition behind them but recently increased gym work or moved into a more demanding squad.

Those swimmers do not automatically need the same training response simply because their shoulders hurt in the same place.

The Masters-specific research reinforces this need for context.

In the 39-swimmer study, Masters athletes reporting pain and disability showed differences in some clinical measures compared with those without significant pain and disability, but this was a cross-sectional study. It can identify associations; it cannot prove that those differences caused the pain.^[2]

That is exactly why assessment should be individual rather than based on a generic checklist.

Common mistakes when a swimmer's shoulder starts hurting

1. Ignoring a worsening pattern

A mild symptom that settles is different from pain that progressively worsens across several sessions.

If the trend is clearly moving in the wrong direction, continuing exactly the same programme deserves reconsideration.

2. Stopping every form of exercise immediately

Depending on the problem, complete inactivity may not be required.

There may still be useful training that can continue while aggravating activities are modified.

3. Searching for one magic shoulder exercise

No single exercise has been shown to address every cause or risk factor associated with shoulder pain in swimmers.

4. Only changing the gym

If swim volume, intensity or paddle use recently increased, modifying two gym exercises while leaving the pool programme untouched may miss an important part of the picture.

5. Only changing the swimming

Equally, if a new strength programme dramatically increased pressing, pulling or total upper-body volume, that needs to be considered too.

6. Treating pain as a test of toughness

Repeatedly making symptoms worse is not evidence of commitment.

Good training changes when the information changes.

Why connected support matters

Shoulder pain is a good example of why performance services should not operate completely independently.

Imagine a swimmer develops shoulder symptoms.

An injury professional may recommend temporarily reducing a particular movement or type of loading.

Their swimming coach needs to know that before writing the next pool programme.

Their Strength & Conditioning Coach may also need to adjust upper-body training.

If those areas operate independently, the swimmer can end up receiving several individually sensible recommendations that make very little sense when combined.

What OXOLT Injury Support is designed to do

OXOLT Injury Support is designed to help Masters swimmers make better decisions when pain or injury starts affecting training.

It is not designed to replace emergency care or appropriate medical diagnosis.

The purpose is to provide specialist guidance around questions such as:

• What training may still be appropriate?
• What might need changing?
• What should the swimmer monitor?
• What could the next step look like?
• Would further assessment or referral be appropriate?

Where appropriate, that information can then be connected with the swimmer's wider OXOLT Performance Team.

Frequently asked questions

Is shoulder pain common in Masters swimmers?

Yes. Masters-specific studies have reported substantial levels of shoulder pain. One study of 39 Masters swimmers found that 69% reported pain during strenuous activity, while another survey of 88 Masters swimmers found shoulder pain in 42% of participants.^[2][3]

Should I stop swimming if my shoulder hurts?

Not automatically. The appropriate response depends on the severity of the symptoms, how they respond to training and whether normal movement or function is affected. Some swimmers may be able to continue with modified training, while others need assessment or a temporary break from aggravating activity.

Can too much swimming cause shoulder pain?

Training exposure appears to be part of the picture, but there is no evidence-based universal weekly distance above which every swimmer will develop shoulder pain. Recent changes in training and the individual's ability to tolerate the overall workload are important considerations.^[1]

Should I stop using paddles if my shoulder hurts?

If paddles clearly aggravate symptoms, temporarily reducing or removing them may be sensible while the problem is assessed. The appropriate decision depends on the individual situation rather than a universal rule.

Can strength training help swimmers with shoulder problems?

Strength training may form part of a swimmer's physical preparation or rehabilitation, but exercise selection should reflect the individual problem and appropriate professional advice. Generic shoulder exercises are not a substitute for assessment when symptoms are significant or persistent.

When should I get shoulder pain checked?

Seek appropriate assessment when symptoms are worsening, persistent or significantly affecting movement, everyday activity or training. NHS guidance recommends GP assessment if shoulder pain is getting worse, has not started improving after around two weeks or makes it very difficult to move the arm or shoulder.^[6]