Martin Stefan Adrian, Tomescu Valeriu
Community Nutrition and Food Hygiene Department, University of Medicine and Pharmacy Tîrgu Mureş, Romania; Romania Rowing Federation, Bucharest, Romania.
Romanian Olympic Sports Committee, Bucharest, Romania; National University of Physical Education and Sports, Bucharest, Romania.
Clujul Med. 2017;90(1):60-65. doi: 10.15386/cjmed-675. Epub 2017 Jan 15.
Energy efficiency within an elite group of athletes will ensure metabolic adaptation during training.
To identify energy system efficiency and contribution according to exercise intensity, and performance obtained during a 2,000 m race simulation in an elite group of rowers.
An observational cross-sectional study was conducted in February 2016 in Bucharest, Romania, on a group of 16 elite rowers. Measurements were performed through Cosmed Quark CPET equipment, and Concept 2 ergometer, by conducting a VO2max test over a standard rowing distance of 2,000 m. The analyzed parameters during the test were: HR (bpm), Rf (b/min), VE (l/min), VO2 (ml/min), VCO2 (ml/min), VT (l), O2exp (ml), CO2exp (ml), RER, PaCO2 (mmHg), PaO2 (mmHg), Kcal/min, FAT (g), CHO (g), from which we determined the ventilatory thresholds, and the energy resource used during the specific 2,000 m rowing distance (ATP, ATP+CP, muscle glycogen).
We performed an association between HR (180.2±4.80 b/min), and carbohydrate consumption during the sustained effort (41.55±3.99 g) towards determining the energy systems involved: ATP (3.49±1.55%), ATP+CP (18.06±2.99%), muscle glycogen (77.9±3.39%). As a result, completion time (366.3±10.25 s) was significantly correlated with both Rf (p=0.0024), and VO2 (p=0.0166) being also pointed out that ≥5 l VO2 value is associated with an effort time of ≤360 s. (p=0.040, RR=3.50, CI95%=1.02 to 11.96). Thus, the average activation time among muscle ATP (12.81±5.70 s), ATP+CP (66.04±10.17 s, and muscle glycogen (295±9.5 s) are interrelated, and significantly correlated with respiratory parameters.
Decreased total activity time was associated with accessing primary energy source in less time, during effort, improving the body energy power. Its effectiveness was recorded by early carbohydrates access, as a primary energy source, during specific activity performed up to 366 seconds.
精英运动员群体中的能量效率将确保训练期间的代谢适应。
根据运动强度确定能量系统效率和贡献，以及在一组精英赛艇运动员进行的2000米比赛模拟中获得的成绩。
2016年2月在罗马尼亚布加勒斯特对一组16名精英赛艇运动员进行了一项观察性横断面研究。通过Cosmed Quark CPET设备和Concept 2测力计进行测量，在2000米的标准赛艇距离上进行最大摄氧量测试。测试期间分析的参数为：心率（次/分钟）、呼吸频率（次/分钟）、分钟通气量（升/分钟）、摄氧量（毫升/分钟）、二氧化碳排出量（毫升/分钟）、潮气量（升）、呼出氧气量（毫升）、呼出二氧化碳量（毫升）、呼吸交换率、动脉血二氧化碳分压（毫米汞柱）、动脉血氧分压（毫米汞柱）、千卡/分钟、脂肪（克）、碳水化合物（克），由此确定通气阈值以及在特定的2000米赛艇距离中使用的能量来源（三磷酸腺苷、三磷酸腺苷+磷酸肌酸、肌糖原）。
我们将心率（180.2±4.80次/分钟）与持续运动期间的碳水化合物消耗量（41.55±3.99克）进行关联，以确定所涉及的能量系统：三磷酸腺苷（3.49±1.55%）、三磷酸腺苷+磷酸肌酸（18.06±2.99%）、肌糖原（77.9±3.39%）。结果显示，完成时间（366.3±10.25秒）与呼吸频率（p=0.0024）和摄氧量（p=0.0166）均显著相关，同时还指出，摄氧量≥5升的值与≤360秒的运动时间相关（p=0.040，相对危险度=3.50，95%置信区间=1.02至11.96）。因此，肌肉中三磷酸腺苷的平均激活时间（12.81±5.70秒）、三磷酸腺苷+磷酸肌酸的平均激活时间（66.04±10.17秒）和肌糖原的平均激活时间（295±9.5秒）相互关联，且与呼吸参数显著相关。
总活动时间的减少与在运动期间更快地获取主要能量来源相关，从而提高身体能量功率。在长达366秒的特定活动中，早期获取碳水化合物作为主要能量来源记录了其有效性。
