Alberto Soriano-Maldonado1, Marius Henriksen2, Víctor Segura-Jiménez3, Virginia A Aparicio4, Ana Carbonell-Baeza5, Manuel Delgado-Fernández3, Kirstine Amris2, Jonatan R Ruiz3. 1. Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain. Electronic address: asm@ugr.es. 2. The Parker Institute, Department of Rheumatology, Copenhagen University Hospital Bispebjerg and Frederiksberg, Frederiksberg, Denmark. 3. Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain. 4. Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain; Department of Physiology, University of Granada, Granada, Spain; Institute of Nutrition and Food Technology, Faculty of Pharmacy, University of Granada, Granada, Spain. 5. Department of Physical Education, School of Education Science, University of Cádiz, Cádiz, Spain.
Abstract
OBJECTIVES: To assess the association between physical fitness and fibromyalgia (FM) severity in women with FM as well as to assess whether different fitness components present an independent relation with FM severity. DESIGN: Population-based cross-sectional study. SETTING: University facilities and FM associations. PARTICIPANTS: Women with FM (N=444). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: FM severity was assessed with the Revised Fibromyalgia Impact Questionnaire (FIQR). Aerobic fitness (6-min walk test), muscle strength (handgrip, chair stand, and arm curl tests), flexibility (chair sit and reach and back scratch tests), and motor agility (8 foot Up and Go test) were measured with the Senior Fitness Test battery and digital dynamometry. A standardized composite score (hereafter "global fitness profile") was calculated and divided into quintiles. RESULTS: Overall, physical fitness was significantly associated with the FIQR total and subscale scores, regardless of the fitness test used (all P<.05). The 6-minute walk and back-scratch tests were independently associated with the FIQR total score (R(2)=.88; both P<.005). The group with the highest global fitness profile had 16% lower FM severity than did the group with the lowest global fitness profile (P<.001). CONCLUSIONS: Our results suggest that higher physical fitness is consistently associated with lower FM severity in women with FM. Aerobic fitness and flexibility present independent associations with FM severity. However, the FIQR variability explained by these fitness tests was rather low (<10%), and further research on the potential disagreement between performance-based physical fitness and different self-reported outcomes in women with FM is warranted.
OBJECTIVES: To assess the association between physical fitness and fibromyalgia (FM) severity in women with FM as well as to assess whether different fitness components present an independent relation with FM severity. DESIGN: Population-based cross-sectional study. SETTING: University facilities and FM associations. PARTICIPANTS: Women with FM (N=444). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: FM severity was assessed with the Revised Fibromyalgia Impact Questionnaire (FIQR). Aerobic fitness (6-min walk test), muscle strength (handgrip, chair stand, and arm curl tests), flexibility (chair sit and reach and back scratch tests), and motor agility (8 foot Up and Go test) were measured with the Senior Fitness Test battery and digital dynamometry. A standardized composite score (hereafter "global fitness profile") was calculated and divided into quintiles. RESULTS: Overall, physical fitness was significantly associated with the FIQR total and subscale scores, regardless of the fitness test used (all P<.05). The 6-minute walk and back-scratch tests were independently associated with the FIQR total score (R(2)=.88; both P<.005). The group with the highest global fitness profile had 16% lower FM severity than did the group with the lowest global fitness profile (P<.001). CONCLUSIONS: Our results suggest that higher physical fitness is consistently associated with lower FM severity in women with FM. Aerobic fitness and flexibility present independent associations with FM severity. However, the FIQR variability explained by these fitness tests was rather low (<10%), and further research on the potential disagreement between performance-based physical fitness and different self-reported outcomes in women with FM is warranted.
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