Purpose: Both aerobic fitness and muscular power have been reported as crucial for elite alpine ski racing1. To date, aerobic fitness has been mainly investigated in skiers using incremental cycling step test, while muscular power by the mean of jump testing such as countermovement jump (CMJ)1. However, no research investigated the relationship between these two fundamental systems. Thus, our purpose was to study the relationship between the maximal cycling workload (MCW) and CMJ- derived metrics. Methods: Sixteen young alpine skiers (gender: 7 F / 9 M; age: 16.7 ± 1.3 years; BMI: 22.8 ± 1.9 kgm-2) performed 2 CMJ trials using an Optojump system2. First, the jump height (CMJH) was computed from the highest trial, as well as the jump peak mechanical power (CMJP) using the Johnson & Bahamonde formula3, including CMJH and participants’ height and weight. Then MCW was determined through an incremental maximal cycling test performed at 80 rpm. After a 3-min warm-up (at 50 W for females and 75 W for males), the workload increased every minute with 15 W steps for females and 25 W for males until exhaustion. MCW was registered as the workload of the last step completed before exhaustion. A stepwise regression model tested the relationship between MCW and CMJ-derived metrics. CMJH and CMJP were entered as continuous predictors, with a threshold to enter and remove terms equal to 0.15. The significance level was set to a = 0.05. Results: Both CMJH (36.2 ± 9.1 cm) and CMJP (2929 ± 1006 W) were included in the model (R2 = 84.9%) and resulted significantly positively correlated with MCW (282 ± 81 W) (F = 5.9, p = 0.030; and F = 36.5, p\0.001 respectively). Follow-up individual linear regression models confirmed the relationships (CMJH: R2 = 45.5%, F = 10.4, p = 0.006; CMJP: R2 = 78.1%, F = 49.6, p\0.001). Conclusions: The presented results demonstrated that both CMJ metrics were positively correlated with MCW, with a strengthened relationship for CMJP, thus adjusting CMJ performance using participants’ anthropometrics. Therefore, these findings further support the interdependency of aerobic fitness and muscular power in the alpine skiers’ performance profile and the importance of training and evaluating both systems
Bertozzi, F., Tenderini, D., Camuncoli, F., Delprato, L., Galvani, C., Galli, M., Tarabini, M., Jump performance relates to maximal cycling workload in young alpine skiers, Abstract de <<SISMES XII NATIONAL CONGRESS>>, (Milano, 2023-11-04 ), <<SPORT SCIENCES FOR HEALTH>>, 2023; 19 (Suppl1): 125-125 [https://hdl.handle.net/10807/230930]
Jump performance relates to maximal cycling workload in young alpine skiers
Tenderini, Dino;Galvani, Christel;
2023
Abstract
Purpose: Both aerobic fitness and muscular power have been reported as crucial for elite alpine ski racing1. To date, aerobic fitness has been mainly investigated in skiers using incremental cycling step test, while muscular power by the mean of jump testing such as countermovement jump (CMJ)1. However, no research investigated the relationship between these two fundamental systems. Thus, our purpose was to study the relationship between the maximal cycling workload (MCW) and CMJ- derived metrics. Methods: Sixteen young alpine skiers (gender: 7 F / 9 M; age: 16.7 ± 1.3 years; BMI: 22.8 ± 1.9 kgm-2) performed 2 CMJ trials using an Optojump system2. First, the jump height (CMJH) was computed from the highest trial, as well as the jump peak mechanical power (CMJP) using the Johnson & Bahamonde formula3, including CMJH and participants’ height and weight. Then MCW was determined through an incremental maximal cycling test performed at 80 rpm. After a 3-min warm-up (at 50 W for females and 75 W for males), the workload increased every minute with 15 W steps for females and 25 W for males until exhaustion. MCW was registered as the workload of the last step completed before exhaustion. A stepwise regression model tested the relationship between MCW and CMJ-derived metrics. CMJH and CMJP were entered as continuous predictors, with a threshold to enter and remove terms equal to 0.15. The significance level was set to a = 0.05. Results: Both CMJH (36.2 ± 9.1 cm) and CMJP (2929 ± 1006 W) were included in the model (R2 = 84.9%) and resulted significantly positively correlated with MCW (282 ± 81 W) (F = 5.9, p = 0.030; and F = 36.5, p\0.001 respectively). Follow-up individual linear regression models confirmed the relationships (CMJH: R2 = 45.5%, F = 10.4, p = 0.006; CMJP: R2 = 78.1%, F = 49.6, p\0.001). Conclusions: The presented results demonstrated that both CMJ metrics were positively correlated with MCW, with a strengthened relationship for CMJP, thus adjusting CMJ performance using participants’ anthropometrics. Therefore, these findings further support the interdependency of aerobic fitness and muscular power in the alpine skiers’ performance profile and the importance of training and evaluating both systems
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