شبكة المعلومات العربية التربوية

The aim of the research is to identify energy quantity indicator that can be predicted through lactic acid concentration after maximal effort as well as specifying the percent of lactic acid concentration contribution on estimating energy Quantity and concluding a prediction formula as energy indicator. The researchers hypothesized significant statistical differences between energy quantity and lactic acid concentration after maximal physical effort. In addition to that the researchers hypothesized that maximal physical effort has a consistent effect of energy quantity. The researchers used the descriptive method with one pilot study on (60) soccer players aged 18 - 25 years old. Two variables were studies; energy expenditure quantity and lactic acid concentration before and after performance and within (1,3,5,7) minutes from maximal physical effort. The data was collected and treated using proper statistical operations. The researchers concluded that the highest lactic concentration was recorded during the first minute of recovery after effort then decreases gradually making predicting total energy expenditure by measuring lactic acid during the 1st, 3rd, 5th, 7th minutes after recovery. (Published abstract)