Blood lipid peroxides and muscle damage increased following intensive resistance training of female weightlifters.
The aim of this study was to examine changes in muscle cell injury and antioxidant capacity of weightlifters following a 1-week intensive resistance-training regimen. Thirty-six female subjects participated in this study, and their ages ranged from 18 to 25 years. The sample group included 19 elite weightlifters with more than 3 years of weightlifting training experience, while the control group comprised 17 non-athletic individuals. Compared with non-athletes, weightlifters had significantly lower glutathione peroxidase activity and plasma vitamin C concentrations. Weightlifters also had significantly higher malondialdehyde + 4-hydroxy 2-(E)-nonenal (MDA+4-HNE) and thiobarbituric acid-reactive substance (TBARS) levels and creatine kinase (CK) activity. For weightlifters, the plasma vitamin E level and the activity of superoxide dismutase (SOD) decreased, and CK activity increased significantly (P < 0.05) after a 1-week intensive resistance-training regimen. Both the TBARS levels and CK activity returned to values of pre-intensive training after a 2-day rest. The MDA+4-HNE level strongly correlated with CK activity in weightlifters (P < 0.05). In conclusion, both long-term exercise training and 1 week of intensive resistance training resulted in increased oxidative stress and cell injury in female weightlifters. Furthermore, proper rest after intensive training was found to be important for recovery.
Liu
Jen-Fang
JF
Graduate Institute of Nutrition and Health Science, Taipei Medical University, Taiwan, ROC.
Chang
Wei-Yin
WY
Chan
Kuei-Hui
KH
Tsai
Wen-Yee
WY
Lin
Chen-Li
CL
Hsu
Mei-Chieh
MC
D000293:Adolescent; D000328:Adult; D000975:Antioxidants / Q000378:metabolism; D003402:Creatine Kinase / Q000378:metabolism; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008054:Lipid Peroxides / Q000097:blood*; D018482:Muscle, Skeletal / Q000293:injuries* / Q000378:metabolism / Q000473:pathology; D014891:Weight Lifting / Q000502:physiology*
D000975:Antioxidants; D008054:Lipid Peroxides; D003402:Creatine Kinase