Wearable Sensors Differentiate Impacts And Intensity Between Games And Practices Among National Junior Ice-hockey Teams

作者：Aaron Pilotti-Riley, Dakota Burke, Davor Stojanov, Stephen J. McGregor · 发表于：Medicine & Science in Sports & Exercise · 年份：2020 · DOI：10.1249/01.mss.0000670736.98661.c5 · 研究领域：Winter Sports Injuries and Performance、Sports Performance and Training、Sports injuries and prevention

PURPOSE: Use wearable sensors (WS) to compare player incurred impacts (PII) and absolute vs relative workload intensity between practices, games and teams to determine if developmental age affects these factors at the national team level. METHODS: 90 total members of the U.S. National (NTDP) U17 (45 members) and U18 (45 members) teams consented to procedures approved by EMU Human Subjects Committee. Bioharness-3 (Zephyr, MD) WS recorded triaxial accelerations during practices (P) and games (G) of the two teams over two seasons. Impacts were identified using Impact Processor (Zephyr, MD). Impacts greater than 6 g (Z3, Z4, Z5 and above) were used as previously validated for PII. Triaxial accelerations were used to generate absolute intensity metrics 30 minute exponentially weighted Dynamic Accelerations (DYNAs) and session DYNAs. Relative intensity metrics Individual Hustle Score (IHS) and Intensity factor (IF) were based on session DYNAs relative to Dynamic functional threshold (DFT). Intensities and PII of two teams were compared between sessions and teams using MANOVA with Tukey post hoc (α= 0.05; SPSS 26.0, IBM, NY) RESULTS: 7288 sessions (1400 G, 2802 P; U17 and 1039 G and 2047 P; U18) were compared. For all combined sessions, impacts were greater for U18 (6.4 ± 7.7) than U17 (5.4 ± 7; p<0.05). Interestingly, impacts in G were not significantly different. Therefore, differences between teams were solely the result of higher impacts in P for U18 (5.8 ± 7.3) vs U17 (4.1 ± 6....