Planning training in phases to peak at the right time and manage fatigue.
Periodisation is the deliberate planning of training load over weeks or months, adjusting volume, intensity and exercise focus in phases so an athlete adapts progressively rather than plateauing or breaking down. Linear models shift gradually from higher volume/lower intensity toward lower volume/higher intensity as a goal event approaches, while undulating models vary these variables more frequently, sometimes within the same week.
For clinicians managing return-to-sport or rehab-to-performance transitions, periodisation gives a framework for deciding when to load tissue harder versus when to back off, rather than progressing load in an ad hoc way. It's also the language strength and conditioning staff use, so understanding it helps clinicians communicate return-to-play timelines and load-management decisions in terms coaches will recognise.
In practice this means structuring rehab or training blocks into phases with defined goals (e.g. capacity building, strength, power, taper), often tracked using session RPE, volume-load (sets x reps x weight), or velocity-based metrics, and reviewed against how the patient or athlete is tolerating and adapting to the plan. Adjustments are made based on symptom response, performance markers and proximity to competition or discharge.
Periodisation models are theoretical frameworks, not guarantees, and evidence comparing linear versus undulating approaches is mixed with no clearly superior model for all populations or goals. It's commonly misapplied by treating the plan as fixed rather than responsive, or by borrowing performance-sport periodisation schemes wholesale into rehab settings where tissue healing timelines and pain responses should take precedence over a preset schedule.