Effect of Fatigue on Some Kinematic Characteristics During Gait, Balance, and Accuracy of Football Shots in High School Boys of Kahnooj Nomads With a History of Coronavirus

Today, after a long period of school closures and sporting events, we will face the post-corona era and the reopening of schools. Because gait imbalance and general weakness are symptoms of corona disease, for people who have recovered, re-exercise, and basic skills such as walking, balance, and accuracy, especially after fatigue, compared to healthy individuals, can be a challenge. This study aimed to investigate the effect of fatigue on kinematic characteristics during gait, balance, and accuracy of football shots in high school boys of Kahnooj nomads with a history of corona virus.

 The present study, in terms of implementation, is in the category of quasi-experimental research, in terms of purpose is in the category of practical, and in terms of time is in the category of future research. A statistical sample was selected from the students of nomadic schools in Kahnooj City, of which 15 were in the healthy group, and 15 were in the group with coronary heart disease. First, the selected kinematic gait parameters, balance, and shot accuracy were measured by an iPhone cellphone camera. Then, the chosen parameters were immediately re-measured by applying fatigue by the non-functional fatigue protocol of the step. To calculate the balance and gait parameters, the rise and fall test, and the shot’s accuracy, the Moore-Christine test was used, and the Kinova program measured the data. Independent t-test, paired t-test, and Wilcoxon-Mann-Whitney t-test were used to analyze the research data at a significant level (α=0.05) in SPSS v. 22 software.

 The results of the present study showed that fatigue had no significant effect on stride length, dynamic balance, and shooting accuracy of healthy students (P>0.05) and caused a decrease in maximal knee flexion in both groups (P=0.005), but fatigue has been able to significantly reduce, step length (P=0.001), dynamic balance (P=0.001) and football shot accuracy (P=0.001)  in students with coronavirus compared to healthy students (P<0.05).

 According to the results of the present study, fatigue after corona disease and its recovery can cause pronounced reduction changes in the length of step, dynamic balance, and especially the accuracy of football shots compared to healthy students and people who were recovering from corona disease when they return to training and competitions must take these changes into account.