Introduction:

Sports training is a process that requires a planning oriented to the adaptation of the body to internal loads versus external loads; from there, arises the need to know the behavior of some musculoskeletal enzymes through the biochemical and physiological control of training in middle-distance athletics.

Objective:

To analyze the enzymatic changes of creatine phosphokinase and lactodehydrogenase during lactic anaerobic training and their influence on aerobic capacity in middle-distance athletes.

Methods:

The descriptive comparative method was used with a sample of 20 subjects randomized in two groups: experimental and control; the analysis was performed under the descriptive Anova statistical model, T-tests and repeated measures design with a 95% confidence interval (p<0.05).

Results:

In the initial and final creatine phosphokinase and lactodehydrogenase variables, there were no significant intergroup variations; differences were observed in creatine phosphokinase regarding variance or standard deviation (p=0.022) in the order of 97.8 %; which in average (p=0.088) represented the levels reached of 91.2 %. In the repeated measures, there were no statistically significant intergroup changes. For the VO2max variable, the T-test was applied to compare the initial and final states in each group and there were differences in both groups (control p=0.002; experimental p=0.000).

Conclusions:

There were no important enzymatic changes during lactic anaerobic and aerobic training, and lactic anaerobic training had an influence on aerobic capacity.

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