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This study (1) analyzes the differences between non-participating and participating older women in terms of clinical characteristics, pain coping strategies, health-related quality of life and physical activity (PA); (2) studies the associations between non-participants and participants, clinical characteristics, pain coping strategies, HRQoL and bodily pain and PA; and (3) determines whether catastrophizing, physical role, behavioural coping, social functioning and emotional role are significant mediators in the link between participating in a Pilates-aerobic program (or not) and bodily pain. The sample comprised 340 older women over 60 years old. Participants of the present cross-sectional study completed measures of clinical characteristics: HRQoL using the SF-36 Health Survey, pain-coping strategies using the Vanderbilt Pain Management Inventory (VPMI) and PA using the International Physical Activity Questionnaire (IPAQ). Significant differences between non-participants and participants, were found in clinical characteristics, pain-coping strategies (both, p < 0.05), HRQoL ( p < 0.01), and PA ( p < 0.001). Moreover, catastrophizing support mediated the link between non-participants and participants and bodily pain by 95.9% of the total effect; 42.9% was mediated by PA and 39.6% was mediated by behavioural coping. These results contribute to a better understanding of the link between PA and bodily pain.

Objective: The Quality of Life Questionnaire of the European Foundation for Osteoporosis-31 (QUALEFFO-31) is a reliable and validated questionnaire that assesses quality of life in osteoporotic women. Our objective was to analyze the reliability and validity of the Spanish version of QUALEFFO-31 and its ability to discriminate between women with osteoporosis and women without osteoporosis in a Spanish postmenopausal population., Methods: One hundred eighteen women (aged 50-65 y) completed the Spanish version of QUALEFFO-31. Bone mineral density was measured by dual-energy x-ray densitometry. Internal consistency and test-retest reliability were analyzed. Concurrent validity of QUALEFFO-31 was evaluated using Spearman's rank correlation coefficient with the 36-item Short-Form Health Survey (SF-36). To determined responsiveness, we analyzed mean differences between osteoporotic and nonosteoporotic women and performed receiver operating characteristic curve analysis., Results: The Spanish version of QUALEFFO-31 has shown excellent test-retest reliability with a high intraclass correlation coefficient for all its domains, especially for the total score (0.988; P < 0.001), and good internal consistency with optimal Cronbach α values in all scales (0.70-0.90). In concurrent validity analysis, QUALEFFO-31 total score showed a high and negative correlation with several scales of the SF-36 (P < 0.001). In responsiveness analysis, significant differences in the pain (P = 0.002) and QUALEFFO-31 total score (P = 0.004) scales were found between osteoporotic and nonosteoporotic women. No differences in areas under the receiver operating characteristic curve were found between the QUALEFFO-31 and the SF-36 scales., Conclusions: The Spanish version of QUALEFFO-31 has good internal consistency, concurrent validity, and test-retest reliability, with satisfactory general psychometric properties, and is a valid tool for discriminating between osteoporotic and nonosteoporotic postmenopausal women aged 50 to 65 years.