Gabbett Performance Solutions, Brisbane, Australia.
PLoS One. 2016 Oct 31;11(10):e0163161. doi: 10.1371/journal.pone.0163161. eCollection 2016.
This study investigated the influence of repeated high-intensity effort exercise on tackling ability in rugby league players, and determined the relationship between physical qualities and tackling ability under fatigued conditions in these athletes. Eleven semi-professional rugby league players underwent measurements of speed (10 m and 40 m sprint), upper-body strength (4 repetition maximum [RM] bench press and weighted chin-up), upper-body muscular endurance (body mass maximum repetition chin-up, body mass maximum repetition dips), lower-body strength (4RM squat), and estimated maximal aerobic power (multi-stage fitness test). Tackling ability was assessed using a standardized one-on-one tackling test, before, during, and following four bouts of repeated high-intensity effort (RHIE) exercise. The relationship between physical qualities and fatigue-induced decrements in tackling ability were determined using Pearson product moment correlation coefficients. Each cycle of the RHIE protocol induced progressive reductions in tackling ability. A moderate reduction (Effect Size = ~-1.17 ± 0.60, -34.1 ± 24.3%) in tackling ability occurred after the fourth cycle of the RHIE protocol. Players with greater relative lower-body strength (i.e. 4RM squat/kg) had the best tackling ability under fatigued conditions (r = 0.72, p = 0.013). There were no significant relationships between tackling ability under fatigued conditions and any other physical quality. These findings suggest that lower-body strength protects against fatigue-induced decrements in tackling ability. The development of lower-body strength should be a priority to facilitate the development of robust tackling skills that are maintained under fatigue.
本研究调查了重复高强度努力运动对橄榄球联赛运动员擒抱能力的影响，并确定了在这些运动员疲劳条件下身体素质与擒抱能力之间的关系。11 名半职业橄榄球联赛运动员接受了速度（10 米和 40 米冲刺）、上肢力量（4 次重复最大[RM]卧推和负重引体向上）、上肢肌肉耐力（最大体重重复引体向上、最大体重重复双杠臂屈伸）、下肢力量（4RM 深蹲）和估计最大有氧能力（多阶段体能测试）的测量。在进行四次重复高强度努力（RHIE）运动之前、期间和之后，使用标准化的一对一擒抱测试评估擒抱能力。使用皮尔逊积差相关系数确定身体素质与疲劳引起的擒抱能力下降之间的关系。RHIE 方案的每个循环都会导致擒抱能力逐渐下降。在 RHIE 方案的第四个循环后，擒抱能力出现中度下降（效应量=-1.17±0.60，-34.1±24.3%）。相对下肢力量较大的球员（即 4RM 深蹲/kg）在疲劳条件下的擒抱能力最佳（r=0.72，p=0.013）。疲劳条件下的擒抱能力与任何其他身体素质之间均无显著关系。这些发现表明，下肢力量可以防止疲劳引起的擒抱能力下降。发展下肢力量应该是优先事项，以促进在疲劳下保持强健的擒抱技能的发展。
