Safety Monitoring
To assure participant safety, everyone was regularly asked to report exercise-related injuries
by phone and on their exercise logs. During the six month active intervention, participants
were explicitly asked over the phone whether they experienced any exercise-related injuries
since the last conversation and they were reminded to record this information weekly on the
exercise logs. During maintenance (months 7–12), participants continued reporting events
on their exercise logs and completed Health Event forms monthly. All health events
reported, regardless of their relation to exercise, were reviewed by the study safety monitor
and principal investigator.