Michalik Kamil, Danek Natalia, Zatoń Marek
Department of Human Motor Skills, Faculty of Physical Education and Sport, Wroclaw University of Sport and Health Sciences, Wroclaw Poland.
Department of Physiology and Biochemistry, Faculty of Physical Education and Sport, Wroclaw University of Sport and Health Sciences, Wroclaw Poland.
J Hum Kinet. 2021 Oct 31;80:163-172. doi: 10.2478/hukin-2021-0104. eCollection 2021 Oct.
The incremental exercise test is the most common method in assessing the maximal fat oxidation (MFO) rate. The main aim of the study was to determine whether the progressive linear RAMP test can be used to assess the maximal fat oxidation rate along with the intensities that trigger its maximal (FAT) and its minimal (FAT) values. Our study comprised 57 young road cyclists who were tested in random order. Each of them was submitted to two incremental exercise tests on an electro-magnetically braked cycle-ergometer - STEP (50 W·3 min) and RAMP (~0.278 W·s) at a 7-day interval. A stoichiometric equation was used to calculate the fat oxidation rate, while the metabolic thresholds were defined by analyzing ventilation gases. The Student's T-test, Bland-Altman plots and Pearson's linear correlations were resorted to in the process of statistical analysis. No statistically significant MFO variances occurred between the tests (p = 0.12) and its rate amounted to 0.57 ± 0.15 g·min and 0.53 ± 0.17 g·min in the STEP and RAMP, respectively. No statistically significant variances in the absolute and relative (to maximal) values of oxygen uptake and heart rate were discerned at the FAT and FAT intensities. The RAMP test displayed very strong oxygen uptake correlations between the aerobic threshold and FAT (r = 0.93, R = 0.87, p < 0.001) as well as the anaerobic threshold and FAT (r = 0.88, R = 0.78, p < 0.001). Our results corroborate our hypothesis that the incremental RAMP test as well as the STEP test are reliable tools in assessing MFO, FAT and FAT intensities.
递增运动试验是评估最大脂肪氧化（MFO）率最常用的方法。本研究的主要目的是确定渐进线性RAMP试验是否可用于评估最大脂肪氧化率，以及引发其最大值（FATmax）和最小值（FATmin）的强度。我们的研究包括57名年轻的公路自行车运动员，他们按照随机顺序进行测试。他们每个人都在电磁制动的自行车测力计上进行了两次递增运动试验——STEP试验（50 W·3分钟）和RAMP试验（~0.278 W·s-1），间隔7天。使用化学计量方程计算脂肪氧化率，同时通过分析通气气体来定义代谢阈值。在统计分析过程中采用了学生t检验、Bland-Altman图和皮尔逊线性相关性分析。两次测试之间未出现具有统计学意义的MFO差异（p = 0.12），STEP试验和RAMP试验中的MFO率分别为0.57±0.15 g·min-1和0.53±0.17 g·min-1。在FATmax和FATmin强度下，未发现摄氧量和心率的绝对值及相对值（相对于最大值）存在统计学意义的差异。RAMP试验显示，有氧阈值与FATmax之间的摄氧量相关性非常强（r = 0.93，R = 0.87，p < 0.001），无氧阈值与FATmax之间的相关性也很强（r = 0.88，R = 0.78，p < 0.001）。我们的结果证实了我们的假设，即递增RAMP试验和STEP试验都是评估MFO、FATmax和FATmin强度的可靠工具。
