Rambaud Olivier, Rahmani Abderrahmane, Moyen Bernard, Bourdin Muriel
Biomechanics and Impact Mechanics Laboratory, Claude Bernard University Lyon 1, Lyon-South Teaching Hospital, Oullins, France.
J Strength Cond Res. 2008 Mar;22(2):383-9. doi: 10.1519/JSC.0b013e31816193e7.
The purpose of this study was to investigate the influence of upper-limb inertia on the force-velocity relationship and maximal power during concentric bench press exercise. Reference peak force values (Fpeakp) measured with a force plate positioned below the bench were compared to those measured simultaneously with a kinematic device fixed on the barbell by taking (Fpeakt) or not taking (Fpeakb) upper-limb inertia into account. Thirteen men (27.8 +/- 4.1 years, 184.6 +/- 5.5 cm, 99.5 +/- 18.6 kg) performed all-out concentric bench press exercise against 8 loads ranging between 7 and 74 kg. The results showed that for each load, Fpeakb was significantly less than Fpeakp (P < 0.0001), whereas no significant difference was found between Fpeakp and Fpeakt. The values of maximal force (F0), maximal velocity (V0), optimal velocity (Vopt), and maximal power (Pmax), extrapolated from the force- and power-velocity relationships determined with the kinematic device, were significantly underestimated when upper-limb inertia was ignored. The results underline the importance of taking account of the total inertia of the moving system to ensure precise evaluation of upper-limb muscular characteristics in all-out concentric bench press exercise with a kinematic device. A major application of this study would be to develop precise upper-limb muscular characteristic evaluation in laboratory and field conditions by using a simple and cheap kinematic device.
本研究的目的是调查上肢惯性对卧推练习中力-速度关系和最大功率的影响。将置于卧推架下方的测力台测得的参考峰值力值（Fpeakp）与通过考虑（Fpeakt）或不考虑（Fpeakb）上肢惯性，同时用固定在杠铃上的运动学装置测得的峰值力值进行比较。13名男性（年龄27.8±4.1岁，身高184.6±5.5厘米，体重99.5±18.6千克）针对7至74千克的8种负荷进行了全力的同心卧推练习。结果表明，对于每种负荷，Fpeakb均显著低于Fpeakp（P<0.0001），而Fpeakp与Fpeakt之间未发现显著差异。当忽略上肢惯性时，从运动学装置确定的力-速度和功率-速度关系外推得到的最大力（F0）、最大速度（V0）、最佳速度（Vopt）和最大功率（Pmax）值被显著低估。结果强调了考虑运动系统总惯性对于使用运动学装置在全力同心卧推练习中准确评估上肢肌肉特征的重要性。本研究的一个主要应用是通过使用简单且廉价的运动学装置，在实验室和现场条件下开展精确的上肢肌肉特征评估。
