The effects of two different concurrent training programs on specific performance, physiological and biochemical parameters in soccer players

The study examined the effects of two concurrent training models, one being an eight-week High-Intensity Interval Training (HIIT) and the other, High-Intensity Functional Training (HIFT) both with additional strength training (S), on physiological parameters (blood lactate concentration and heart rate), athlete's performance (maximal strength, explosive power, aerobic endurance, 20 m sprint), and biochemical outputs. The study involved a total of 21 young males playing with amateur soccer licenses for at least 2 years divided into three groups. One group received S + HIIT training, second group received S + HIFT training and the control group continued their soccer-specific training. Both the experimental and the control groups underwent pre- and post-tests and while only the experimental groups underwent an eight-week training program. Pre- and post-tests of the all the participants included measurements of body composition, adaptation studies, trial measurements, biochemical blood, aerobic endurance measurements, sprint tests, and strength measurements. The Mixed Design ANOVA analysis was utilized to examine the performance, physiological, and biochemical data of the participants before and after the experiment. Concurrent training models were effective in increasing athletic performance (VO2max, CMJ, 1RM bench press and Yo-Yo test) and physiological outcomes during recovery (HR, blood lactate, Borg Scale) compared to the control group with traditional training. There was no significant difference between the biochemical changes in the S + HIIT, S + HIFT and control groups during the trial period. In summary, both concurrent training (CT) models had positive effects on sports performance and physiological outcomes, but not on biochemical outcomes.