Effects on physical performance and pain from three dynamic training programs for women with work-related trapezius myalgia

To compare training programs for women with trapezius myalgia regarding phy sical performance and pain, 102 women were randomized to strength, enduranc e, co-ordination and non-training groups. Before and after the intervention , static strength and dynamic muscular endurance in shoulder muscles were m easured on a Cybex II dynamometer, Muscle activity in shoulder muscles was monitored via surface EMG, The signal amplitude ratio between the active an d passive phase of repeated contractions indicated the ability to relax. Pa in at present, pain in general and pain at worst were measured on visual an alogue scales. After training, within group comparisons showed that the tra ining groups rated less pain, and in the strength training group ratings of pain at worst differed from the non-training group. Using the non-training group as a reference, static strength increased in the strength and endura nce training groups and muscular endurance in all training groups. The stud y indicates that regular exercises with strength, endurance or co-ordinatio n training of neck/shoulder muscles might alleviate pain for women with wor k-related trapezius myalgia.