Effect of different recovery periods during a high Intensity Training (HIT) session on some hematologic factors and Muscle Damage in active males

Background: Recovery periods during intense exercise cause changes in blood flow, such as hematologic factors and Muscle Damage. The aim of present study was to evaluate the effect of different recovery in an high intensity training session changes of platelets, white blood cells and creatine kinase serum before, immediately after and two hours after exhaustive exercise in healthy active men.

Methods: In this stude, 24 healthy men (Age: 21/07± 1/57, weight: 68/41± 11/75, body fat percentage: 15/93± 6/11 and VO2max: 41/83± 5/87) were selected and randomly divided into three groups including: control, aerobic and stretching PNF recovery were studied. The blood samples were collected from anticubital venous in at pre-test, post-test and follow up. To measure the platelets and white blood cells values, Flowcytometry and equipment Mindray BC-5800 and to measure creatine kinase serum values ELISA technique was used. And to identify significant the data for the analysis of variance with repeated measures with Bonferroni post hoc tests at a significance level of α=0.05 was used.

Results: There was a significant difference about the amount of platelets, white blood cells and creatine kinase serum in different periods of pre-test, post-test and follow-up revealed(P<0.001). The Bonferroni Post-hoc test results showed a significant difference in the control group between post-test and follow-up(P<0.05), in the PNF group between pre-test and post-test(P<0.05) and post-test and follow-up(P<0.01) and in the aerobic group between pre-test and post-test(P<0.001) and post-test and follow-up periods(P<0.01). Bonferroni post hoc test creatine kinase serum results, showed significant differences between the control group post-test and follow-up(P<0.05), PNF group between pre-test and post-test periods(P<0.05) and post-test and follow-up (P<0.01).

Conclusion: There was no effect of aerobic recovery and PNF stretching at rest in a HIT training session on platelets, white blood cells and creatine kinase is, but a change in values before and after training in each group. The advantage of active and passive recovery for changes in some hematological values and no Muscle Damage after an intense training. Keyword: PNF Stretching, Exercises HIT, Platelets, White Blood Cell, Creatine Kinase Serum, Active Males