MethodsParticipants between the ages of 18 and 40 years wereincluded in the study if they ran for 20 min or more at leasttwice per week. Sixty-six eligible recreational and competitiveendurance and sprint runners were recruited to participate inthe study through advertising at medical centres and fitnesscentres.
Participants were excluded if they
•Had a current severe injury, particularly acute or chronic low backpain.
•Were currently pregnant or had been pregnant in the last twoyears.
•Could not assume the correct leg positions involved in theSahrmann test.
•Had known cardiovascular disease, cancer, pre-/diabetes, coro-nary artery disease, moderate/severe angina, intermittentclaudication, moderate/severe dyspnoea or any other injury orillness which results in abnormal fatigue or muscle weakness.