Monteiro Estêvão Rios, Neto Victor Gonçalves Corrêa
Department of Gymnastics, School of Physical Education and Sports, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Int J Sports Phys Ther. 2016 Dec;11(7):1076-1081.
Foam rolling (FR) is a common intervention utilized for the purpose of acutely increasing range-of-motion without subsequent decreases in performance. FR is characterized as an active technique which subject performs upon themselves. Thus, it is believed that the accumulated fatigue can influence whether the task can be continued.
To analyze the effect of different foam rolling volumes on fatigue of the knee extensors.
Twenty-five recreationally active females (age 27.7 ± 3.56 y, height 168.4 ± 7.1 cm, weight 69.1 ± 10.2 kg) were recruited for the study. The experiment involved three sets of knee extensions with a pre-determined 10 repetition maximum load to concentric failure. Then, subjects performed the control (CONT) and foam rolling (FR) conditions. FR conditions consisted of different anterior thigh rolling volumes (60-, 90-, and 120-seconds) which were performed during the inter-set rest period. After that, the fatigue index was calculated and compared between each experimental condition. Fatigue index indicates how much (%) resistance the subjects experienced, calculated by the equation: (thidset/firstset) x 100.
Fatigue index was statistically significantly greater (greater fatigue resistance) for CONT compared to FR90 ( = 0.001) and FR120 ( = 0.001). Similarly, higher fatigue resistance was observed for FR60 when compared to FR120 ( = 0.048). There were no significant differences between the other conditions ( > 0.005).
The finding of foam rolling fatigue index decline (less fatigue resistance) as compared to control conditions may have implications for foam rolling prescription and implementation, in both rehabilitation and athletic populations. For the purposes of maximum repetition performance, foam rolling should not be applied to the agonist muscle group between sets of knee extensions. Moreover, it seems that volumes greater than 90-seconds are detrimental to the ability to continually produce force.
2b.
泡沫轴放松（FR）是一种常见的干预措施，旨在急性增加关节活动范围且不会导致后续运动表现下降。FR被认为是一种受试者自行进行的主动技术。因此，人们认为累积的疲劳会影响任务是否能够持续进行。
分析不同泡沫轴放松时长对膝伸肌疲劳的影响。
招募了25名有运动习惯的女性（年龄27.7±3.56岁，身高168.4±7.1厘米，体重69.1±10.2千克）参与该研究。实验包括三组膝伸展动作，以预先确定的10次重复最大负荷进行至向心收缩力竭。然后，受试者分别进行对照（CONT）和泡沫轴放松（FR）两种情况的测试。FR情况包括在组间休息期间进行不同时长（60秒、90秒和120秒）的大腿前侧滚动放松。之后，计算并比较每种实验情况下的疲劳指数。疲劳指数通过公式（第三组/第一组）×100计算得出，表明受试者经历了多少（%）阻力。
与FR90（P = 0.001）和FR120（P = 0.001）相比，CONT的疲劳指数在统计学上显著更高（抗疲劳能力更强）。同样，与FR120相比，FR60的抗疲劳能力更高（P = 0.048）。其他情况之间无显著差异（P > 0.005）。
与对照情况相比，泡沫轴放松疲劳指数下降（抗疲劳能力较弱）这一发现可能对康复和运动员群体的泡沫轴放松处方及实施有影响。为了达到最大重复次数表现，在膝伸展动作组间不应将泡沫轴放松应用于主动肌组。此外，似乎超过90秒的时长对持续发力能力有害。
2b。
