Skip to main content
2023 NSCA National Conference Main banner
Icon Legend
This session is not in your schedule.
This session is in your schedule. Click again to remove it.
Back
Rate ePoster

Speed/Power Development

(29) RELATIONSHIPS BETWEEN COUNTERMOVEMENT JUMP FORCE-TIME CHARACTERISTICS AND 500-METER SPRINT TIME IN SPEED SKATERS

Friday, July 14, 2023
12:30 PM – 2:00 PM East Coast USA Time
Location: Milano III-IV
Abstract Details:

Purpose: To examine the relationships between countermovement jump (CMJ) braking and propulsion force-time characteristics and 500-m sprint time in national and international level speed skaters.

Methods: 9 male (age: 21.0 ± 2.6 years, body mass: 77.9 ± 10.1 kg, height: 179.9 ± 8.8 cm) and 10 female (age: 20.8 ± 4.4 years, body mass: 64.9 ± 5.1 kg, height: 167.9 ± 3.6 cm) 500-m national and international level speed skaters performed unloaded CMJ testing one week before the 2022 Olympic Trials. The subjects performed a self-selected dryland warm-up prior to CMJ testing. Two maximal CMJ trials were performed with the subjects’ arms akimbo on dual force plates. 500-m times were obtained from the Olympic Trials one week after the CMJ assessments. The force-time data collected from the force plates were used to calculate CMJ height (JH), braking mean force (BMF), peak force (BPF), and duration (BDur), and propulsion mean force (PMF), peak force (PPF), and duration (PDur) during each jump trial. The average performance between CMJ trials was used to examine the relationships of each variable with the subjects’ 500-m time. Pearson correlation coefficients (r) and coefficients of determination (R2) were used to examine the relationships between CMJ force-time characteristics and 500-m sprint time.

Results: The CMJ force-time characteristics, 500-m times, and correlation magnitudes are displayed in Table 1. The relationships between JH, BPF, PMF, PPF, and PDur and 500-m time were all statistically significant (p < 0.05). In contrast, the relationships between BMF and BDur and 500-m time were not statistically significant (p > 0.05). JH and PMF displayed very large relationships with 500-m time while large relationships were displayed with BPF, PPF, and PDur. JH, BPF, PMF, PPF, and PDur explained 78.3%, 29.8%, 58.2% 46.6%, and 28.4% of the 500-m time variance, respectively.

Conclusions: Very large relationships existed between CMJ JH and PMF and the 500-m sprint times in national and international level speed skaters. A large portion (78.3%) of the 500-m time variance was explained by CMJ JH indicating the potential to use this variable to monitor a speed skater’s performance. It is also important to develop the propulsive strength characteristics of speed skaters given that 58.2% of the 500-m time variance was explained by PMF. CMJ braking characteristics do not appear to be effective monitoring variables for speed skaters due to only small portions of 500-m sprint time variance being explained. PRACTICAL APPLICATIONS: Strength and conditioning practitioners may consider using JH as a monitoring variable with short distance speed skaters. It is evident that maximizing a speed skater’s propulsive strength characteristics (i.e., peak force and rapid force production) may positively impact speed skating sprint performance. Thus, practitioners should implement dryland and resistance training strategies to benefit these characteristics.

Acknowledgements: None