Krause David A, Hollman John H
Int J Sports Phys Ther. 2020 Oct;15(5):755-762. doi: 10.26603/ijspt20200755.
Slider exercises, which may use a gliding disc or "slider", are dynamic exercises used for strengthening. They are proposed to increase challenge as the friction between the body and ground is decreased which increases the demands on muscles of the weight bearing limb.
The purposes of this study were (1) to compare the electromyographic (EMG) activity level of hip muscles of the weight bearing limb while performing a single limb slide squat to that of a standard isometric squat and (2) to investigate the influence of trunk position on hip EMG activity. It was hypothesized that the single limb slide squat would elicit greater hip EMG activity than an isometric squat and trunk position would influence EMG activity.
Analytic, observational cross-sectional study design.Methods: Twenty healthy male participants (age = 23.7 ± 1.3) volunteered. EMG hip muscle activation of the stance leg was measured during a single limb slide squat and as a comparison, the same leg during a standard double limb isometric squat. Both exercises where performed with a knee flexion angle of 60˚ and the trunk positioned 40˚ (flexed trunk) and 60˚ (upright trunk) relative to the floor. Surface electrodes were used to collect EMG data.
EMG activity of the gluteus maximus, gluteus medius, biceps femoris and rectus femoris was significantly greater with both single limb slide exercises as compared to both squat exercises. EMG activity was greater with the flexed trunk as compared to the upright trunk for the biceps femoris.
Slider exercises produced a moderate or high level of activation for all muscles whereas all squat exercises produced a low-level activation.
Level 3 Mechanism-based reasoning intervention study trial.
滑动练习，可能会使用滑动盘或“滑块”，是用于增强力量的动态练习。随着身体与地面之间的摩擦力减小，对承重肢体肌肉的要求增加，从而增加了练习的挑战性。
本研究的目的是（1）比较单腿滑动深蹲时承重肢体髋部肌肉的肌电图（EMG）活动水平与标准等长深蹲时的活动水平，以及（2）研究躯干位置对髋部EMG活动的影响。假设单腿滑动深蹲比等长深蹲能引起更大的髋部EMG活动，并且躯干位置会影响EMG活动。
分析性观察性横断面研究设计。
20名健康男性参与者（年龄=23.7±1.3）自愿参加。在单腿滑动深蹲期间测量站立腿的EMG髋部肌肉激活情况，并作为比较，在标准双腿等长深蹲期间测量同一条腿的情况。两种练习均在膝关节屈曲角度为60˚且躯干相对于地面呈40˚（屈曲躯干）和60˚（直立躯干）的位置进行。使用表面电极收集EMG数据。
与两种深蹲练习相比，单腿滑动练习时臀大肌、臀中肌、股二头肌和股直肌的EMG活动明显更大。对于股二头肌，屈曲躯干时的EMG活动比直立躯干时更大。
滑动练习对所有肌肉产生中等或高水平的激活，而所有深蹲练习产生低水平的激活。
3级基于机制的推理干预研究试验。
