Periods & Sport

MIXED / UNCERTAIN: cycle phase & performanceSUPPORTED BUT INDIVIDUAL: symptoms can affect sportE&A PRACTICE STANDARD: dignity & privacy

What periods can mean in sport

People can experience periods very differently. Some notice little effect on sport. Others experience pain, heavy bleeding, headaches or migraine, tiredness, bloating, mood changes or other symptoms that can make training or competition more difficult. Research synthesising athletes’ experiences reports that cycle-related symptoms can affect participation, perceived performance and wellbeing for some athletes; this does not mean the same symptoms or effects occur for everyone.

For cue sports and darts, the practical issues may include long tournament days, travel, access to toilets and products, prolonged sitting or standing, clothing, and anxiety about leaking. These are participation considerations. We have not identified evidence that justifies claiming a particular menstrual phase universally reduces pool, blackball, snooker or darts performance.

Does menstrual-cycle phase determine performance?

No universal rule is supported by current evidence. A major systematic review and meta-analysis found only a trivial average difference in exercise performance across cycle phases, with substantial variation and generally low-quality evidence. A later systematic review restricted to studies using stronger hormone-verification methods also found mixed findings and continuing methodological limitations.

Practical guidance for players

• Bring the period products you prefer, and consider a spare product or change of clothing for long event days if that would make you more comfortable.
• Find out where toilets are and whether you can access them between matches or practice blocks.
• Ask for a reasonable break or practical adjustment if symptoms are affecting you.
• If you want to track symptoms or periods, keep that information under your control and use it for your own awareness rather than treating an app prediction as a performance forecast.
• Do not feel you have to explain intimate medical details to justify an ordinary practical need.

This is practical sport guidance, not individual medical or medication advice.

Guidance for coaches

• Ask what would help today instead of assuming what menstruation means for performance.
• Offer practical support such as a break, access to facilities or a private conversation where appropriate.
• Do not predict poor concentration, mood or performance simply because an athlete is menstruating.
• Do not routinely require menstrual dates, app screenshots, bleeding information or cycle tracking.
• Do not diagnose the cause of pain, heavy bleeding, missed periods or irregular periods.
• Where a health concern is raised, support the athlete to seek appropriate professional advice rather than trying to treat it as a coaching problem.

Coach framework: Listen → Support → Adjust → Signpost.

Guidance for clubs and venues

• Keep toilets usable, private and easy to locate.
• Provide sanitary disposal in appropriate toilets.
• Allow reasonable toilet and welfare breaks within the sporting format.
• Make period products available where practical, without making access embarrassing.
• Challenge teasing, shaming or degrading comments about periods.
• Do not build general membership or coaching forms that unnecessarily collect menstrual information.
• For girls, use age-appropriate language and keep safeguarding routes clear.

When additional health support may be appropriate

Period problems should not automatically be dismissed as “normal for athletes”. NHS guidance advises seeking healthcare support in circumstances including period pain that is severe, worsening or affecting usual daily activities; heavy periods that affect daily life; irregular periods or a change in the normal pattern; and repeated missed periods. These symptoms can have many possible causes, so coaches and clubs should not diagnose them.

Girls and young players

NHS information for young people treats periods as a normal part of growing up and encourages clear, ongoing age-appropriate conversations. In sport, girls should have discreet access to toilets, products and support without being subjected to informal menstrual surveillance by coaches.

If a wider safeguarding concern arises during a conversation, staff should follow the organisation’s safeguarding procedure rather than using this resource as an investigation or disclosure-management tool.

Two common myths

Companion resources

Evidence and source notes

Medical and evidence boundaries

This resource provides general information and practical sport guidance. It does not diagnose, prescribe, interpret individual tests, advise somebody to start or stop medication, or provide medical clearance. Lived-experience material, if added later, must be separately consented and labelled.