[Purpose] This study was to examine the effects of 12 weeks of Tai Chi (TC) exercise on
antioxidant capacity, and DNA damage/repair in young females who did not perform regular
physical exercise. [Subjects and Methods] Ten female students from a Chinese university
voluntarily participated in this program. All of them practiced the 24-form simplified Tai
Chi, 5 times weekly, for 12 weeks. Plasma levels of superoxide dismutase (SOD),
glutathione peroxidase (GPx), malondialdehyde (MDA), glutathione (GSH), hydroxyl radical
inhibiting capacity (OH·-IC), 8-hydroxy-2’-deoxyguanosine (8-OHdG), and 8-oxoguanine DNA
glycosylase (OGG1) were measured at 0, 8, and 12 weeks. Heart rate (HR) was monitored
during the last set of the training session at 4, 8, and 12 weeks. [Results] Plasma SOD
and OH·-IC levels were increased at 8 and 12 weeks compared to the baseline (0 weeks). Gpx
and GSH levels did not change significantly throughout the study period. The plasma MDA
level was decreased significantly at 8 weeks but not at 12 weeks compared to the baseline
value. While the plasma 8-OHdG level did not change throughout the study period, the
plasma OGG1 level was significantly increased at 8 and 12 weeks compared to the baseline
value. [Conclusion] TC practice for 12 weeks efficiently improved the oxidative stress
response in young females who did not perform regular physical exercise. The TC exercise
also increased the DNA repairing capacity.
Introduction: Cardiopulmonary function is directly related to the body's ability to perform metabolism under aerobic conditions. It is a key characteristic for the training of professional swimmers. It is believed that adding interval training to traditional workouts may contribute to the aerobic endurance of these athletes. Objective: Evaluate the interval training effects on the cardiorespiratory capacity of swimmers. Methods: Twenty volunteer swimmers were randomly divided into two groups for seven weeks. There were 4 hours of class per week, totaling 28 hours of training. In the formal training stage, the experimental group performed intermediate-intensity training, while the control group continued to perform traditional swim team training. The experimental indicators pertinent to the evaluated athletes were collected, tested, and analyzed before and after the experiment. Results: The VO2 of the athletes in the experimental group increased from 3.90±0.67L/min before the experiment to 4.06±0.73L/min after the experiment; VE increased from 156.08±35.76L before the experiment to 180.08±39.42L after the experiment; underwater endurance time increased from 46.80±8.43s before the experiment to 55.49±7.60s after the experiment. Conclusion: Intermittent training improves athletes' physical fitness and sports capacity, being an effective method to improve cardiopulmonary function. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.
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