The subjects engaged in the intervention for 1 hour per day, 5 days per week, for an average of 10 weeks. Four subjects (5%) withdrew from the study during the first 4 weeks (three in the training condition, one in the control condition) and declined further participation. Of the 55 remaining subjects, 29 received the active intervention (20 men and nine women) and 26 were in the control condition (20 men and six women).