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Full-Text Articles in Sports Sciences
The Use Of An Optical Measurement System To Monitor Sports Performance, Eric D. Magrum, John P. Wagle, Brad H. Deweese, Kimitake Sato, Michael H. Stone
The Use Of An Optical Measurement System To Monitor Sports Performance, Eric D. Magrum, John P. Wagle, Brad H. Deweese, Kimitake Sato, Michael H. Stone
ETSU Faculty Works
The purpose of this study was to compare ground contact time between an optical measurement system and a force platform. Participants in this study included six collegiate level athletes who performed drop jumps and sprint strike steps for a total of 15 repetitions each. Ground contact data was simultaneously collected from an optical measurement system and a force platform, at a sampling frequency of 1000 Hz. Data was then analyzed with Pearson’s correlation and paired sample t-tests. The measures from the optical measurement system were found to be significantly higher (p < 0.001) than measures from the force platform in both conditions. Although significantly different, the extremely large relationships (0.979, 0.993) found between the two devices suggest the optical sensor is able to detect similar changes in performance to that of a force platform. Practitioners may continue to utilize optical sensors to monitor performance as it may provide a superior user-friendly alternative to more traditional based monitoring procedures, but must comprehend the inherent limitations due to the design of the optical sensors.
A Comparison Of Pairs Figure Skaters In Repeated Jumps, William A. Sands, Wendy L. Kimmel, Jeni R. Mcneal, Steven Ross Murray, Michael H. Stone
A Comparison Of Pairs Figure Skaters In Repeated Jumps, William A. Sands, Wendy L. Kimmel, Jeni R. Mcneal, Steven Ross Murray, Michael H. Stone
ETSU Faculty Works
Trends in pairs figure skating have shown that increasingly difficult jumps have become an essential aspect of high-level performance, especially in the latter part of a competitive program. We compared a repeated jump power index in a 60 s repeated jump test to determine the relationship of repeated jump test to competitive rank and to measure 2D hip, knee, and ankle angles and angular velocities at 0, 20, 40, and 60 s. Eighteen National Team Pairs Figure Skaters performed a 60 s repeated jump test on a large switch-mat with timing of flight and ground durations and digital video recording. …