Comparison of Interventional Strategies to Improve Recovery after Eccentric Exercise-Induced Muscle Fatigue

The aim of this study was to compare the effects of various recovery techniques on muscle tissue after eccentric exercise-induced muscle fatigue (EIMF). Forty subjects (24.3 +/- 2.6 years; 77.45 +/- 8.3 kg; 177.0 +/- 6.4 cm; 24.66 +/- 1.6 kg center dot m(-2)) were randomly assigned to one of the following groups: manual therapy (n =10, MT), mechanical vibration (n = 10, MV), percussion therapy (n = 10, PT) or foam roller (n = 10, FR). The contraction time (Tc) and the radial displacement (Dm) of the gastrocnemius was evaluated through tensiomyography (TMG). The application of the different techniques had positive effects for Tc and Dm in the treated leg compared to the untreated leg (F = 50.01, p < 0.01, eta(2)p = 0.58 and F = 27.58, p < 0.01, eta(2)p = 0.43, respectively) and for the interaction of the factors (Time x Leg x Therapy: F = 5.76, p < 0.01, eta(2)p = 0.32 and F = 5.93, p < 0.01, eta(2)p = 0.33, respectively). The results of the various methods used were similar: Tc (F = 0.17, p = 0.917; eta(2)p = 0.01) and Dm (F = 3.30, p = 0.031, eta(2)p = 0.22). PT interventions show potential for restoring muscle compliance and reducing stiffness, similar to MT and possibly more effective (cost-time relationship) compared to MV or FR.