Effects of Different Type of Training on Blood Antioxidant Capacity and Redox Balance in Middle-aged and Elderly Women

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  • 中高齢女性における血中の抗酸化能力および酸化還元バランスに対する異なるタイプの運動トレーニングの影響
  • チュウ コウレイ ジョセイ ニ オケル ケッチュウ ノ コウサンカ ノウリョク オヨビ サンカ カンゲン バランス ニ タイスル コトナル タイプ ノ ウンドウ トレーニング ノ エイキョウ

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金沢大学人間社会研究域人間科学系

The effect of two different types of physical training (endurance and resistance training) on antioxidant capacity and oxidative stress is still unknown in middle-aged and elderly individuals. In this study, we examined the effect of 12 weeks of endurance or resistance training on glutathione metabolism, indicated redox state in blood, and peroxide state of lipid in plasma in middle-aged and elderly women (64.0±3.7 years old, n=13). The endurance training group (End, n=8) was performed 5 days/week cycle ergometric exercise at 80 % of ventilatory threshold (VT) for 30 minutes. The resistance training group (Res, n=5) carried out 2 days/week isokinetic knee extension, knee flexion, hip extension and hip flexion exercise, and isotonic hip extension, hip flexion and hip abduction exercise. Before and after 12 weeks training, both oxidized and reduced glutathione concentrations ([GSSG] and [GSH]) in blood and the plasma concentration of thiobarbituric acid reactive substance ([TBARS]) were determined in blood samples obtained at rest and immediately after two acute exercise tests: maximal cycle ergometric exercise and steady state cycle exercise at 80 % of ventilatory threshold (VT) for 30 minutes (include one minute of warming up). At rest, both group significantly increased [GSH] and significantly decreased the ratio of [GSSG]/[GSH] after training. There was no significant change in [TBARS] at rest. Two different types of training did not alter the changes in [GSH], [GSSG]/[GSH] and [TBARS] parameters induced by both types of acute exercise tests. These data suggest that both endurance and resistance trainings induce antioxidant capacity (reduced glutathione) up-regulation, and thus inhibit lipid peroxide accumulation in middle-aged and elderly women.

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