Associations of Muscle Strength and Fitness with Metabolic Syndrome in Men

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JURCA, R., M. J. LAMONTE, T. S. CHURCH, C. P. EARNEST, S. J. FITZGERALD, C. E. BARLOW, A. N. JORDAN, J. B. KAMPERT, and S. N. BLAIR. Associations of Muscle Strength and Aerobic Fitness with Metabolic Syndrome in Men. Med. Sci. Sports Exerc., Vol. 36, No. 8, pp. 1301–1307, 2004.Purpose:To examine the associations for muscular strength and cardiorespiratory fitness with the prevalence of metabolic syndrome among men.Methods:Participants were 8570 men (20–75 yr) for whom an age-specific muscular strength score was computed by combining the body weight adjusted one-repetition maximum measures for the leg press and the bench press. Cardiorespiratory fitness was quantified by age-specific maximal treadmill exercise test time.Results:Separate age and smoking adjusted logistic regression models revealed a graded inverse association for metabolic syndrome prevalence with muscular strength (β = −0.37, P < 0.0001) and cardiorespiratory fitness (β = −1.2, P < 0.0001). The association between strength and metabolic syndrome was attenuated (β = −0.08, P < 0.01) when further adjusted for cardiorespiratory fitness. The association between cardiorespiratory fitness and metabolic syndrome was unchanged (β = −1.2, P < 0.0001) after adjusting for strength. Muscular strength added to the protective effect of fitness among men with low (P trend = 0.0002) and moderate (P trend < 0.0001) fitness levels. Among normal weight (BMI < 25), overweight (BMI 25–30), and obese (BMI ≥ 30) men, respectively, being strong and fit was associated with lower odds (73%, 69%, and 62% respectively, P < 0.0001) of having prevalent metabolic syndrome.Conclusions:Muscular strength and cardiorespiratory fitness have independent and joint inverse associations with metabolic syndrome prevalence.

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