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. 2000 Sep;24(9):1207-11.
doi: 10.1038/sj.ijo.0801373.

Moderate-intensity regular exercise decreases serum tumor necrosis factor-alpha and HbA1c levels in healthy women

S Tsukui  1 , T Kanda, M Nara, M Nishino, T Kondo, I Kobayashi
Affiliations

Moderate-intensity regular exercise decreases serum tumor necrosis factor-alpha and HbA1c levels in healthy women

S Tsukui et al. Int J Obes Relat Metab Disord. 2000 Sep.

Abstract

Objective: To evaluate the effects of moderate-intensity regular exercise on serum levels of tumor necrosis factor-alpha (TNF-alpha) and glucose and lipid metabolism parameters.

Design: Longitudinal intervention study of a 5 month exercise training program (30-45 min/day, 4-5 days/week).

Subjects: Forty-one healthy Japanese women aged 41-69 y at baseline; 27 participants in the exercise program.

Measurements: Body mass index (BMI), waist-to-hip ratio (WHR), percentage body fat, and fasting levels for serum TNF-alpha, serum soluble TNF receptor p55 (TNF-RI) and TNF receptor p75 (TNF-RII), serum lipids, HbA1c, and serum insulin before and after exercise.

Results: In overweight to obese subjects, serum levels of TNF-alpha, TNF-RI and TNF-RII were significantly higher than those in lean subjects. There were significant correlations between log serum TNF-alpha and BMI, percentage body fat, WHR, HbA1c and log insulin. TNF-RI was significantly correlated with BMI, percentage body fat, WHR and HbA1c. TNF-RII was also associated with BMI, percentage body fat and WHR. However, the correlation between TNF-RII and HbA1c did not reach statistical significance. Neither TNF-RI nor TNF-RII was correlated with log insulin. In contrast, TNF-alpha, TNF-RI and TNF-RII were negatively correlated with HDL cholesterol. Regular exercise decreased BMI, percentage body fat, HbA1c, serum TNF-alpha, TNF-RI and TNF-RII and increased HDL cholesterol levels. In addition, exercise-induced change in serum TNF-alpha was independently correlated with changes in HbA1c and serum insulin, after being adjusted for the change in fat-free mass.

Conclusion: Changes in serum TNF-alpha that occur with exercise may play an important role in improving glucose metabolism parameters.

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