Myotonometric Effect of Foam Rolling Following Strength Training

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Foam Rolling (FR) is widely used as an intervention therapy device to alleviate, treat, and possibly prevent myofasciatic condition in exercise and in high performance sports. Its use may be beneficial on the pressure sensitive muscle tissue via regeneration therapy; however, these effects have not been sufficiently investigated. PURPOSE: The aim of this investigation was to assess whether the use of FR may benefit muscle tissue compliance via myotonometric intervention training (MMT) and subsequent muscle regeneration after exhausting high intensity strength training experiment (EXP). METHODS: Twenty sport students (7 male and 13 female; age 24.7±2.9 yrs, BMI 22.2±2.4 kg.m2) performed a single exhausting strength training session (leg extension with both legs) followed by FR session (using right leg only). The FR session (2x45s) was conducted again after 24, 48 and 72 hours. The left leg served as a control (CON). Prior to exhaustion and after every FR session, we determined muscle tissue compliance of rectus femoris muscle (MMT). We utilized Hz-frequency analysis to assess tissue compliance. RESULTS: The time effect was as follows: (pre: EXP 14.53±1.12, CON 14.37±0.99; post 0: EXP 14.60±1.28, CON 14.63±1.01; post-24: EXP 14.56±1.31, CON 14.25±1.11; post-48: EXP 14.36±1.22, CON 14.33±1.16; post-72: EXP 14.33±1.31, CON 14.25±1.15 Hz). The investigation revealed significant increase in Hz-frequency (greater compliance) immediately post exhausting strength training session but returned to base values day after (P=0.006). There was no significant main effect between EXP und CON (P=0.8). There was also no interaction effect for FR (P=0.399). DISCUSSION: Although scientific literature report fatigue and recovery effects; however, we did not find regenerative effects of FR when using MMT. From practical point of view, we were able to document at least partially the regenerative use of MMT immediately after the EXP but we were not able to ascertain that even repeated FR treatment daily will beneficially effect muscle compliance and the desired outcome. Future studies utilizing different dose, duration, and repetitions may yield results that are more promising.

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