Lactate, creatine kinase, and lactate dehydrogenase concentrations in amateur soccer players exposed to immersion cryotherapy and efficiency of the subjective perception of effort.

Abstract

Objective: To analyze the effects of cryotherapy on parameters of lactate, creatine kinase (CK), and lactate dehydrogenase (LDH) in the recovery period after an amateur soccer match, and to identify whether the subjective perception of effort (SPE) is a good marker of intensity. Methods: Initially, twenty players aged between 20 and 36 years participated, however, four were excluded from lactate collections and five from CK and LDH collections. Then totaling, 16 samples for lactate collections and 15 for CK and LDH collections. The players were submitted to 10 minutes of cryotherapy in a 250-liter drum with water at a temperature of 5º ± 1º C up to the anterior inferior iliac spine at the end of the match to evaluate the concentrations of the studied biochemical parameters. Results: No statistical difference was observed regarding the cryotherapy factor on the markers lactate (p= 0.143), CK (p= 0.74), and LDH (p= 0.71). In the PSE analyses, a correlation was found between the mean PSE 6-20 (13± 1.11) performed at the end of the first (12.13±1.12) and second halves (13.86±1.19) with the PSE 0-10 applied 30 minutes after the end of the game (3.73±1.16). Conclusion: It is concluded that immersion cryotherapy does not have modulatory effects on the concentrations of lactate, CK, or LDH in amateur soccer players, and that both the PSE 6-20 and PSE 0-10 can be used as a tool to identify the intensity of exercise.