Faculty of Medicine and Surgery, School of Sport and Exercise Sciences, University of Rome Tor Vergata, Rome, Italy.
J Strength Cond Res. 2009 Oct;23(7):1982-7. doi: 10.1519/JSC.0b013e3181b7f941.
The aim of this study was to examine the aerobic fitness and lower-limbs explosive-power abilities of Italian regional-level amateur basketball players. Participants were basketball players playing successfully at a senior (S, n = 11) and junior (J, n = 11) regional level. Players maximal oxygen uptake (VO2max) was assessed with them wearing a portable gas analyzer (K4b, COSMED, Rome, Italy) during an exercise mode-specific multistage fitness test (yo-yo endurance test [Yo-Yo]). Knee extensors and plantar flexors explosive power was assessed with countermovement jump (CMJ) and stiff-leg jumps (SL), respectively. Jumps were performed using a switch mat connected to a computer (Muscle Lab, Bosco System, Rome, Italy). Jumps' fly (FT) and contact times (CT) were used for jump performances calculations. Stiff-Leg FT versus CT ratio (SL/CT) was considered as representative of lower-leg explosive power, whereas SL/CMJ.100 was considered as sign of the explosive-power balance between lower and upper leg muscles. Players' VO2max was 60.88 +/- 6.26 and 50.33 +/- 3.98 mLxkgxmin for J and S, respectively (p < 0.05). A significant difference was found in SL/CT between S and J players. Yo-Yo performance was not significantly different between groups (2,055 +/- 267 and 2,020 +/- 174 m for S and J, respectively, p > 0.05). Lower-leg explosive power showed to be positively related to distance covered during Yo-Yo. Study results showed that 50 mLxkgxmin is a sufficient VO2max value for competing at a regional level. Calf explosive power should be considered to improve sport-specific running performance in basketball using plyometrics and whole body lifts.
本研究旨在探讨意大利地区业余篮球运动员的有氧适能和下肢爆发力能力。参与者为在高级（S，n=11）和初级（J，n=11）地区水平上成功参赛的篮球运动员。在特定于运动模式的多阶段体能测试（Yo-Yo 耐力测试）期间，运动员的最大摄氧量（VO2max）通过佩戴便携式气体分析仪（K4b，COSMED，意大利罗马）进行评估。通过反跳（CMJ）和直腿跳（SL）分别评估膝关节伸肌和跖屈肌爆发力。跳跃使用连接到计算机的开关垫（Muscle Lab，Bosco System，意大利罗马）进行。跳跃的腾空（FT）和接触时间（CT）用于计算跳跃表现。直腿 FT 与 CT 的比值（SL/CT）被认为是小腿爆发力的代表性指标，而 SL/CMJ.100 则被认为是上下腿肌肉爆发力平衡的指标。运动员的 VO2max 分别为 60.88±6.26 和 50.33±3.98 mLxkgxmin，J 和 S 之间存在显著差异（p<0.05）。S 和 J 运动员之间的 SL/CT 存在显著差异。两组之间的 Yo-Yo 表现无显著差异（S 和 J 分别为 2,055±267 和 2,020±174 m，p>0.05）。小腿爆发力与 Yo-Yo 期间的距离呈正相关。研究结果表明，50 mLxkgxmin 是在地区水平上竞争的足够的 VO2max 值。小腿爆发力应该被认为是使用增强式训练和全身举重来提高篮球专项跑步表现的关键因素。
