01 · Define the population
A result in young competitors may not transfer neatly to a recreational man in his forties.

Evidence is not a shopping list. It is a way to ask better questions, understand limits, and choose a proportionate next step.
Open the glossaryA result in young competitors may not transfer neatly to a recreational man in his forties.
Laboratory markers, time trials, wellbeing, and injury outcomes answer different questions.
Small studies and short interventions can be useful without being definitive.