Individualized Force-Velocity Training to Improve Reactive Strength Index in NCAA Football Athletes
Justin Lima, PhD
The Acute Effects of Ischemic Preconditioning on Power and Sprint Performance.
Author(s): Lindner, Tiegen D.; Scholten, Shane D.; Halverson, Jayde M.; Baumgarten, Keith M.; Birger, Chad B.; Nowotny, Brett G.
South Dakota Medicine . May2021, Vol. 74 Issue 5, p210-219. 8p
Relationship Between Single Leg Reactive Strength Index and Overuse Injuries in Collegiate Middle-Distance and Distance Runners
Niksic et al. (2019) Int J Res Ex Phys. 15(1):50-63.
Validity and Reliability of Devices Measuring Countermovement Vertical Jump Performance
Concurrent Validity and Reliability of Three Ultra-Portable Vertical Jump Assessment Technologieshttps://www.mdpi.com/1424-8220/20/24/7240
My colleagues and I recently independently validated the G-Flight microsensor (manufactured by Exsurgo). To robustly test the G-Flight, squat, countermovement and drop-jump heights, and ground contact-time and reactive strength index (RSI) of the drop-jump were compared over three days in 12 University researchers. We compared the G-Flight to gold-standard force plates and motion-capture, and another consumer product, the PUSH band accelerometer.
While all of the details can be found in the recently published, peer-reviewed paper, the G-Flight provided outputs that were similar to force plates and motion capture technology However, the G-Flight was slightly more variable than the PUSH or gold standard tech (likely due to participants jumping slightly forward or backward. Therefore, users should aim to take the average of 3-5 jumps, and closely monitor jumps and remove data points with noticeable forward or backward displacement. Additionally, landing on the full-foot would likely improve accuracy and reliability.
Dustin Oranchuk (MSc, CSCS*D) is currently completing his PhD at the Auckland University of Technology.
Concurrent validity of the portable gFlight system compared to a force plate to measure jump performance variables
Arran Parmar, MRes, BSc (Hons) | ASCC
PhD Candidate | Department of Sport Exercise and Rehabilitation
Northumbria University, Newcastle
31 October 2022