Journal of Exercise & Organ Cross Talk

Abstract Intense and high-speed intermittent training is recognized as an effective method for achieving rapid and extensive physiological and functional adaptations. However, it is important to consider that a single session of such exercises can exert significant physiological stress, potentially leading to adverse effects. Therefore, this study investigated the effects of a repeated sprint training (RSA) session on serum adropin, inflammatory, and blood coagulation factors. Ten healthy young men (age: 23.60 ± 2.01 years, weight: 68.60 ± 7.21 kg, body mass index: 22.00 ± 2.10 kg/m2) participated in this study. Blood samples were collected before, immediately after, and 20 minutes following the exercise protocol for measuring of adropin protein, fibrinogen, CRP, WBC, RBC, Hgb, and Hct levels. The exercise protocol consisted of 20 repetitions of different running speeds in a distance of 20 meters, with a 20-second rest period after each repetition (20*20*20). A significant increase in adropin, fibrinogen, WBCs, RBC, Hgb and, Hct levels was observed immediately after the exercise (p < 0.05). But only Adropin levels remained significantly higher than before the exercise after 20 minutes following the exercise. Therefore, even after exercise, adropin levels can remain elevated, allowing for the continuation of its positive effects. However, it is important to note that the increase in fibrinogen levels may require further investigation, particularly in relation to the use of anticoagulant agents. Therefore, when considering the implementation of these intense activities for inactive individuals, it is crucial to exercise caution and carefully assess the potential risks involved.

Abstract This study aims to investigate the effectiveness of the USRPT system combined with beta-alanine supplementation on the physical performance of elite young soccer players. Forty-four young soccer players were purposefully selected and divided into four groups of 11 players: Exercise-only (placebo), Exercise with a supplementation, supplementation-only, and a control group. After a 10-minute warm-up, subjects performed the 25-minute USRPT protocol in three weekly sessions, followed by regular team training. The supplementation group consumed 4 grams of beta-alanine daily for six weeks, split into two doses 60 minutes before and after each training session. Body composition, aerobic fitness (Half-time test), anaerobic power (RAST test), 20-meter sprint, muscle endurance, and Borg's Rate of Perceived Exertion (RPE) were measured in the pre-test and post-test. The repeated measures ANOVA revealed a significant difference in aerobic power, anaerobic power, muscular endurance, and fatigue drag index between the exercise-placebo and exercise-plus-supplementation groups after 40 days (P=0.001). No significant differences were found between the supplementation and control groups in other variables (P>0.05). This research found that the USRPT system effectively improves aerobic and anaerobic power in soccer players. It also suggests that when combined with USRPT, beta-alanine supplementation reduces fatigue and enhances performance. Beta-alanine boosts sports performance by increasing Carnosine in muscle cells and offering antioxidant benefits. Coaches and athletes aiming to improve physical performance may consider using beta-alanine alongside targeted training.