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Full-Text Articles in Medicine and Health Sciences
Attenuated Lower Limb Stretch-Shorten-Cycle Capacity In Acl Injured Vs. Non-Injured Female Alpine Ski Racers: Not Just A Matter Of Between-Limb Asymmetry, Matthew J. Jordan, Nathaniel Morris, Sophia Nimphius, Per Aagaard, Walter Herzog
Attenuated Lower Limb Stretch-Shorten-Cycle Capacity In Acl Injured Vs. Non-Injured Female Alpine Ski Racers: Not Just A Matter Of Between-Limb Asymmetry, Matthew J. Jordan, Nathaniel Morris, Sophia Nimphius, Per Aagaard, Walter Herzog
Research outputs 2022 to 2026
A retrospective analysis of routine countermovement jump (CMJ) testing, a coupled eccentric-concentric (stretch-shorten-cycle: SSC) movement, was performed in female elite alpine skiers with anterior cruciate ligament (ACL) reconstruction (ACLR) and without ACLR. A total of 567 tests obtained from the daily training environment were analyzed in 41 elite female athletes (non-injured control: n = 30, ACLR: n = 17), including n = 6 athletes with pre-injury data, between 16 and 32 years of age from alpine ski racing (n = 32) and skier cross (n = 9). Bilateral CMJ testing was conducted on a dual force plate system, and the …
Forecasting Neuromuscular Recovery After Anterior Cruciate Ligament Injury: Athlete Recovery Profiles With Generalized Additive Modeling, Matthew J. Jordan, Nathaniel Morris, Jeremiah Barnert, Drew Lawson, Isabel Aldrich Witt, Walter H Herzog
Forecasting Neuromuscular Recovery After Anterior Cruciate Ligament Injury: Athlete Recovery Profiles With Generalized Additive Modeling, Matthew J. Jordan, Nathaniel Morris, Jeremiah Barnert, Drew Lawson, Isabel Aldrich Witt, Walter H Herzog
Research outputs 2022 to 2026
A retrospective analysis of longitudinally collected athlete monitoring data wasconducted to generate a model of neuromuscular recovery after anterior cruciateligament (ACL) injury and reconstruction (ACLR). Neuromuscular testing data in-cluding countermovement jump (CMJ) force‐time asymmetries and knee extensorstrength (maximum voluntary contractionext) asymmetries (between‐limb asymmetryindex—AI) were obtained from athletes with ACLR using semitendinosus (ST) au-tograft (n= 29; AI measurements: n= 494), bone patellar tendon bone autograft(n= 5; AI measurements:n= 88) and noninjured controls (n= 178; AI measurements:n= 3188). Explosive strength measured as the rate of torque development was alsocalculated. CMJ force‐time asymmetries were measured over discrete movementphases (eccentric deceleration phase, concentric phase). …
Simplifying External Load Data In Ncaa Division-I Men's Basketball Competitions: A Principal Component Analysis, Jason D. Stone, Justin J. Merrigan, Jad Ramadan, Robert Shaun Brown, Gerald T. Cheng, William Guy Hornsby, Holden Smith, Scott M. Galster, Joshua A. Hagen
Simplifying External Load Data In Ncaa Division-I Men's Basketball Competitions: A Principal Component Analysis, Jason D. Stone, Justin J. Merrigan, Jad Ramadan, Robert Shaun Brown, Gerald T. Cheng, William Guy Hornsby, Holden Smith, Scott M. Galster, Joshua A. Hagen
Faculty & Staff Scholarship
The primary purpose was to simplify external load data obtained during Division-I (DI) basketball competitions via principal component analysis (PCA). A secondary purpose was to determine if the PCA results were sensitive to load demands of different positional groups (POS). Data comprised 229 observations obtained from 10 men's basketball athletes participating in NCAA DI competitions. Each athlete donned an inertial measurement unit that was affixed to the same location on their shorts prior to competition. The PCA revealed two factors that possessed eigenvalues >1.0 and explained 81.42% of the total variance. The first factor comprised total decelerations (totDEC, 0.94), average …
The Agreement Between A Portable Contact-Mat And Force-Plates During Bilateral Vertical Jumps, Stuart N. Guppy, Yosuke Kotani, Jason Lake, Christopher Latella, Jodie Cochrane Wilkie, Kristina Kendall, G. Gregory Haff
The Agreement Between A Portable Contact-Mat And Force-Plates During Bilateral Vertical Jumps, Stuart N. Guppy, Yosuke Kotani, Jason Lake, Christopher Latella, Jodie Cochrane Wilkie, Kristina Kendall, G. Gregory Haff
Research outputs 2022 to 2026
Force plates are commonly used when assessing vertical jumping performance but are not always affordable or practical tools for all testing situations. Twenty-four participants volunteered to take part in a study investigating the agreement between bilateral force plates and a new commercially available contact mat that records jump height, flight-time (FT), and FT of individual limbs during both countermovement (CMJ) and squat (SJ) jumps. Each participant performed six jumps of each type while standing on a contact mat placed upon a pair of in-ground force plates. When compared to the force plate via ordinary least products regression, the contact mat …