The aim of the present study was to investigate the effects of Imagery on energy systems (aerobic and anaerobic) through VO2max and lactic acid variables and therefore on sports performance in professional soccer players after a LAS. Consequently, exploration of the energy expenditure after a LAS and during the return to play period could be a strong indicating factor as a return to sport criterion.
Fifty-eight professional soccer players were randomly allocated into 2 groups: 1st—MI group (n = 29) and 2nd—Placebo group (n = 29). Both groups completed 6 intervention sessions. The 1st MI group received Imagery instructions from a standardized recording in addition to the physiotherapy program, while the 2nd Placebo group received only relaxation instructions. VO2max was evaluated with the Bruce protocol using ergospirometry while the lactic acid was measured with the lactate test through the peripheral blood given upon completion of Bruce protocol.
One-way ANOVA showed statistically significant results for VO2max and lactic acid variables, before and 4 weeks after the Imagery interventions for both groups. The paired t-test showed statistically significant differences between the 2 groups for VO2max (t = - 6.04, S (two-tailed) = 0.000, p 0.05) and for lactic acid (t = 4.33, S (two-tailed) = 0.000, p 0.05) in all time phases.
The findings of the present study suggested that Imagery paired with physiotherapy is an efficacious therapeutic modality in relation to sports performance. Therefore, further investigation is needed in order to explore the effects of imagery as a possible criterion on the duration of return to play period.
The results of the present study proved Imagery an effective adjunct therapeutic modality for sports physiotherapists, coaches and practitioners who wish to improve athletes’ sports performance and potentially reduce the duration of the return to play period.
VO2max
Lactic acid
