High-Intensity vs. Preferred-Intensity Resistance Training in Fibromyalgia

Participants complete an 8-week supervised resistance training program consisting of 2 weekly 60-minute sessions (up to 16 sessions total, with flexibility to reschedule missed sessions due to clinical reasons). Prior to the intervention, participants complete 3 familiarization sessions without intensity control to learn proper exercise execution and facility equipment. Each session includes a low-load warm-up (1 lower-body and 2 upper-body exercises), main part of the session (chest press, seated cable row, squat, leg press, shoulder press, and standing calf raise), and 10 minutes of static stretching cooldown. Participants perform 3 sets of 8-12 repetitions with 1-2 minutes of rest between sets. Load selection is based on the participant's perceived capacity, with instructions that the weight may lead to concentric failure. Load progression occurs when exercises are performed with proper technique and the participant requests an increase; all loads are continuously logged.

Participants complete an 8-week supervised resistance training program consisting of 2 weekly 60-minute sessions (up to 16 sessions total, with flexibility to reschedule missed sessions due to clinical reasons). Prior to the intervention, participants complete 3 familiarization sessions without intensity control to learn proper exercise execution and facility equipment. Each session includes a low-load warm-up (1 lower-body and 2 upper-body exercises), themain part of the sessi (chest press, seated cable row, squat, leg press, shoulder press, and standing calf raise), and 10 minutes of static stretching cooldown. Participants perform 4 sets of 6 repetitions with 2 minutes of rest between sets, encouraged to reach concentric failure on the final set.Load increases by 10%-20% following proper execution across two consecutive sessions; all loads are continuously logged.