Data regarding associations between vertical jumping and sprinting ability is lacking in elite sprinters. Therefore, the aim of this study was to evaluate relationship between variables such as countermovement jump (CMJ) height, relative peak power, and sprint time including flight time and ground contact time across various distances in the 50-m sprint among elite sprinters. Twenty- three male sprinters performed two CMJ attempts followed by two 50-m sprints on an indoor track. Jumping performance was assessed via force plates, while sprint times were recorded using timing photocells, with gates at 0, 5, 20, 30, and 50-m. Results showed a statistically significant negative correlations ranging from large to very large, between CMJ height and sprint time (p<0.01; r= -0.56 to -0.73) across specific distances. Similarly, a significant large to very large correlations was found between CMJ relative peak power and sprint time (p<0.01; r= -0.61 to -0.85) at the studied distances. Furthermore, a large significant correlations was indicated between sprint contact time and sprint time at certain distances (p<0.01; r= -0.55 to 0.62), while sprint flight time correlated with distances above 20-m sprint time (p<0.05; r= 0.45 to 0.48) and with the 20-50-m flying start sprint time (p<0.05; r= 0.48), reaching a moderate magnitude. These findings suggest a significant negative correlation between relative peak power, CMJ height and sprint times across various distances, highlighting the potential for individualized training based on distinct sprint phases. Remarkably, the strength of these correlations increase with longer sprint distance.

Introduction: Although soccer matches require players to perform repetitive power-related abilities, the impact of lower-body strength and power asymmetry on sprint and change of direction (COD) performance receives little attention. Therefore, this study aimed to establish the relationship between lower limb power, sprint, and change of direction (COD) performance. In addition, the relationship between lower limb power asymmetry and the above mentioned running tests was determined. Material and Methods: Twenty-four male soccer players from First Polish League (age = 24.8 ±8.2 years, body mass = 77.4 ±16.9kg, body height=179.5 ±14.5cm, soccer training experience = 10 ± 1.5years) took part in the study. To examine the relationship between linear sprint, lower limb muscle power, and COD performance (time and deficit), the following tests were performed: 5-and 20-m linear sprint, leg press exercise, and two 20-m COD sprints (“COD90” and “L” test). Result: Pearson correlation coefficients didn’t show any statistically significant relationship between lower limb power and linear sprint speed as well as COD performance. The results indicate that the considered variables are independent physical characteristics. Conclusion: Relative lower limb-power output and low level of mean inter-limb asymmetry in power output does not affect 5- and 20-m linear sprint time and COD performance with 90° turn.

The study aimed to evaluate the impact of listening to preferred music during active/passive rest on power output and heart rate in barbell squats (BS) and bench presses (BP). Fifteen participants (13 males and 2 females), moderately resistance trained, were engaged in four randomized experimental sessions with varying rest intervals (active/passive) and music presence (listening or not). Each session involved three sets of three repetitions of BS and BP at a 50% one-repetition maximum. ANOVA showed a significant main effect of the set for BP relative mean and peak power output (p < 0.001; both). The post hoc comparisons indicated a significantly higher BP relative mean and peak power output in set_2 (p < 0.001; effect size [ES] = 0.12 and p < 0.001; ES = 0.10) and set_3 (p < 0.001; ES = 0.11 and p = 0.001; ES = 0.16) in comparison to set_1. Moreover, a main effect of the set indicating a decrease in BS relative peak power output across sets was observed (p = 0.024) with no significant differences between sets. A significantly higher mean heart rate during active rest in comparison to passive rest was observed (p = 0.032; ES = 0.69). The results revealed no significant effect of listening to music on relative power output and heart rate during BS and BP.