Department of Sports Dietetics, Poznan University of Physical Education, 61-871, Poznan, Poland.
Department of Human Nutrition and Dietetics, Poznan University of Life Sciences, 60-624, Poznan, Poland.
Sci Rep. 2021 Mar 31;11(1):7263. doi: 10.1038/s41598-021-86660-x.
Cross-training is a high-intensity functional training (HIFT) with multiple workout modalities. Despite the increasing number of studies in HIFT, there is still no validated test to measure its specific performance. It would also be advisable to determine whether selected cross-training workouts can implement a stimulus corresponding to maximize aerobic work. For these reasons, the purpose of our study was to evaluate the repeatability and reliability of Fight Gone Bad (FGB) workout and to assess its relationship with aerobic fitness. Twenty-one cross-training participants (9 females) finished the study protocol which included three two-day measurement sessions separated by 10 days. During each session, participants had their body composition measured, and they performed two exercise tests. The first test was an incremental cycling test to measure aerobic fitness, and the second was a cross-training specific FGB workout performed the next day. Reliability and repeatability were calculated from the three measurements. The total FGB Score (FGB) showed excellent reliability (ICC 0.9, SEM 6%). Moreover, FGB was strongly correlated with aerobic fitness (i.e., time to exhaustion (T, R = 0.72), maximal workload (W, R = 0.69), time to gas exchange threshold (T, R = 0.68), and peak oxygen uptake (VO, R = 0.59). We also found that agreement between standardized FGB and standardized aerobic performance indices such as T, VO, W, maximum heart rate, T, and workload at gas exchange threshold was high by the Bland-Altman method. In conclusion, FGB is a reliable test that can be used in order to measure changes in cross-training performance caused by an intervention. Moreover, FGB is strongly correlated to aerobic fitness.
交叉训练是一种高强度的功能性训练（HIFT），具有多种锻炼方式。尽管 HIFT 的研究越来越多，但仍然没有经过验证的测试来衡量其特定的性能。确定选定的交叉训练锻炼是否可以实施刺激以最大限度地提高有氧运动也将是明智的。出于这些原因，我们的研究目的是评估 Fight Gone Bad（FGB）锻炼的可重复性和可靠性，并评估其与有氧健身的关系。21 名交叉训练参与者（9 名女性）完成了研究方案，该方案包括三个为期两天的测量阶段，间隔 10 天。在每个阶段，参与者都测量了身体成分，并进行了两项运动测试。第一项测试是递增式自行车测试，用于测量有氧健身能力，第二项测试是第二天进行的交叉训练特定的 FGB 锻炼。从三个测量值计算可靠性和可重复性。总 FGB 得分（FGB）显示出极好的可靠性（ICC 0.9，SEM 6%）。此外，FGB 与有氧健身能力高度相关（即，衰竭时间（T，R=0.72），最大工作量（W，R=0.69），气体交换阈值时间（T，R=0.68）和峰值摄氧量（VO，R=0.59）。我们还发现，通过 Bland-Altman 方法，标准化 FGB 与标准化有氧表现指数（如 T、VO、W、最大心率、T 和气体交换阈值时的工作量）之间的一致性很高。总之，FGB 是一种可靠的测试，可以用于测量干预引起的交叉训练表现的变化。此外，FGB 与有氧健身能力密切相关。
