Background:evaluate the effectiveness of strengthening exercises using the Swiss ball in patients with fibromyalgia (FM).
Methods:Method: a randomized controlled trial with sixty FM patients was done. Patients were randomized into two groups: intervention group (IG), in which patients performed muscle
strength exercises using the Swiss ball or a stretching group (SG) in which patients performed stretching exercises. All patients participated in 40-minute training sessions 3 times per week for 12
weeks. The IG performed the following strengthening exercises using a Swiss ball: lateral rise, simultaneous biceps curl, squat, two arms triceps extension, abdominal, one arm dumbbell row, reverse
crucifix and crucifix. The SG performed stretching exercises for the same muscle groups. Outcome measures were: pain using the visual analogue scale (VAS); muscle strength (1 repetition maximum
test); disease impact (fibromyalgia impact questionnaire - FIQ); quality of life (SF-36). All participants underwent an evaluation at baseline, at 6 weeks and at 12 weeks of training. The assessor
was blind to patient allocation.
Results:The two groups were homogeneous regarding clinical and demographic characteristics at baseline. The IG showed statistically significant improvement in VAS and FIQ compared
with the SG. The IG also showed greater muscle strength through loads compared to the SG over time. Both groups improved overall quality of life. No adverse events were reported.
Conclusions:: Strengthening exercises using the Swiss ball demonstrated improvements in pain, health related quality of life and muscle strength in patients with FM compared to