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| 題名: | Eight-Week Training Cessation Suppresses Physiological Stress but Rapidly Impairs Health Metabolic Profiles and Aerobic Capacity in Elite Taekwondo Athletes |
| 作者: | Liao, YH (Liao, Yi-Hung)
Sung, YC (Sung, Yu-Chi)
Chou, CC (Chou, Chun-Chung)
Chen, CY (Chen, Chung-Yu) |
| 貢獻者: | 國術系 |
| 關鍵詞: | NECROSIS-FACTOR-ALPHA
C-REACTIVE PROTEIN
INSULIN-RESISTANCE
GLUCOSE-TOLERANCE
FAT DISTRIBUTION
EXERCISE
INFLAMMATION
RESPONSES
RECOVERY
FITNESS |
| 日期: | 2016-07 |
| 上傳時間: | 2017-04-12 10:43:51 (UTC+8) |
| 摘要: | Changes in an athlete's physiological and health metabolic profiles after detraining have not been studied in elite Taekwondo (TKD) athletes. To enable a better understanding of these physiological changes to training cessation, this study examined the effects of 8-weeks detraining on the aerobic capacity, body composition, inflammatory status and health metabolic profile in elite TKD athletes. Sixteen elite TKD athletes (age: 21.0 +/- 0.8 yrs, BMI: 22.4 +/- 3.9 kg/m(2); Mean +/- SD; 11 males and 5 females) participated in this study. Physical activity level assessment using computerized physical activity logs was performed during the competitive preparation season (i.e. one-week before national competition) and at two week intervals throughout the detraining period. Participant aerobic capacity, body fat, and blood biomarkers were measured before and after detraining, and the blood biomarker analyses included leukocyte subpopulations, blood glucose, insulin, dehydroepiandrosterone-sulfate (DHEA-S), and cortisol. Eight-week detraining increased DHEA-S/cortisol ratio (+57.3%, p = 0.004), increased insulin/cortisol ratio (+59.9%, p = 0.004), reduced aerobic power (-2.43%, p = 0.043), increased body fat accumulation (body fat%: +21.3%, p < 0.001), decreased muscle mass (muscle mass%: -4.04%, p < 0.001), and elevated HOMA-IR (the biomarker of systemic insulin resistance; +34.2%, p = 0.006). The neutrophil-to-lymphocyte ratio (NLR), a systemic inflammatory index, increased by 48.2% (p = 0.005). The change in aerobic capacity was correlated with the increased fat mass (r = -0.429, p = 0.049) but not with muscle loss. An increase in the NLR was correlated to the changes in HOMA-IR (r = 0.44, p = 0.044) and aerobic capacity (r = -0.439, p = 0.045). We demonstrate that 8-week detraining suppresses physiological stress but rapidly results in declines in athletic performance and health metabolic profiles, including reduced aerobic capacity, increased body fat, muscle loss, insulin resistance development and elevated systemic inflammatory status in these young elite TKD athletes. The inflammation state was positively associated with insulin resistance development, fat mass, WHR (the index for central fat accumulation), and the decline in VO(2)max. |
| 關聯: | PLOS ONE 卷: 11期: 7 文獻號碼: e0160167 |
| 顯示於類別: | [技擊運動暨國術學系] 期刊論文
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