Perceived pain before and after three exercise programs - a controlled clinical trial of women with work-related trapezius myalgia

The effect of exercise on neck-shoulder pain was studied in 103 women with work-related trapezius myalgia randomized into three exercise groups and a control group. One group trained strength, the second muscular endurance an d the third co-ordination. The exercise groups met three times weekly for 1 0 weeks. Pain assessment was made on three visual analogue scales, indicati ng pain at present, pain in general and pain at worst. Pain thresholds were measured in the trapezius muscle with a pressure algometer. A pain drawing was completed. The rated pain decreased significantly (P < 0.05) on the VA S describing pain at worst in the strength and endurance groups. Pressure s ensitivity decreased significantly (P < 0.05) in four triggerpoints in the exercise groups. No changes were seen in the extent of painful body area in any group. Comparison of exercisers (n = 82) and controls (n = 21) showed significantly larger pain reductions on VAS pain at present and VAS pain at worst among exercisers. All three exercise programs showed similar decreas es of pain which indicates that the type of exercise is of less importance to achieve pain reduction. (C) 2000 International Association for the Study of Pain. Published by Elsevier Science B.V. All rights reserved.