Muscle Damage, Soreness, and Stress During Preseason Training in Collegiate Swimmers.

Background: In 2014, 6 collegiate swimmers were hospitalized for symptomatic exertional rhabdomyolysis.

Objective: To serially monitor and assess relationships between skeletal muscle membrane disruption, upper body soreness (UBS) and lower body soreness (LBS), and stress during the first 6 weeks (timepoints) of preseason training in collegiate male and female swimmers.

Design: Prospective observational study.