Department of Sport Sciences and Physical Education, Nord University, Levanger, Norway.
J Strength Cond Res. 2021 May 1;35(5):1419-1424. doi: 10.1519/JSC.0000000000002898.
van den Tillaar, R. Comparison of step-by-step kinematics of elite sprinters' unresisted and resisted 10-m sprints measured with Optojump or Musclelab. J Strength Cond Res 35(5): 1419-1424, 2021-The purpose of this study was to compare step-by-step kinematics of unresisted and resisted 10-m sprints measured with the Optojump or Musclelab on elite sprinters. Six subjects (age 30.0 ± 5.1 years, body mass 76.3 ± 5.3 kg, body height 1.79 ± 0.09 m, and 100-m personal best 10.51 ± 0.3 s) performed 2 unresisted and 2 sets of 2 resisted (10 and 20% of body mass) 30-m sprints in random order (6 sprints in total) in 1 session in which kinematics of the first 10 m were measured with the Optojump and Musclelab. The main finding was that there were no significant differences between the measurements made with the Optojump and Musclelab systems. In addition, it was possible to discriminate most kinematic variables per step of the first 10 m when different loads (10 and 20% of body mass) had to be pulled during the 30-m sprints. The variations in sprint times associated with changes in the resistance provided by the dynaSpeed were mainly caused by a decrease in step length as the resistance increased. It was concluded that the 2 systems are valid and could help coaches, researchers, and athletes by providing more detailed information about possible changes to kinematics during training and sprinting with different resistances.
范登提拉尔，R. 精英短跑运动员无阻力和有阻力 10 米短跑的分步运动学比较，使用 Optojump 或 Musclelab 测量。J 力量与调理研究 35(5)：1419-1424，2021-本研究的目的是比较使用 Optojump 或 Musclelab 测量的无阻力和有阻力 10 米短跑的分步运动学，这些测量是针对精英短跑运动员进行的。6 名受试者（年龄 30.0±5.1 岁，体重 76.3±5.3kg，身高 1.79±0.09m，100m 个人最好成绩 10.51±0.3s）在 1 次会议中以随机顺序进行了 2 次无阻力和 2 组 2 次阻力（体重的 10%和 20%）的 30 米短跑（总共 6 次短跑），其中前 10 米的运动学使用 Optojump 和 Musclelab 进行测量。主要发现是，Optojump 和 Musclelab 系统的测量结果没有显著差异。此外，当在 30 米短跑中必须拉动不同的负荷（体重的 10%和 20%）时，有可能区分前 10 米每一步的大多数运动学变量。与阻力变化相关的短跑时间变化主要是由于阻力增加时步长减小引起的。结论是，这两个系统都是有效的，可以通过提供有关在不同阻力下训练和短跑时运动学可能发生的变化的更详细信息，帮助教练、研究人员和运动员。
