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Lachlan P. James, Haresh Suppiah, Michael R. McGuigan, and David L. Carey

Countermovement jump (CMJ) assessment is a commonly used test in strength and conditioning to inform the training process. For example, it can be used to explore neuromuscular function, assess the response to training interventions, monitor athletes’ performance readiness through a competitive

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Thomas A. Haugen, Felix Breitschädel, Håvard Wiig, and Stephen Seiler

jump is the exercise modality where the highest anaerobic power output values are obtained, 6 although a direct relationship between jump height and power output is confounded by body mass, push-off distance, optimal loading, and individual force–velocity profile. 7 The countermovement jump (CMJ) test

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Amirhossein Emamian, Alireza Hashemi Oskouei, Rasoul Azreh, and Kevin Carroll

kinematic variables of movement ( Bartlett, 2014 ; Newell, 1985 ). The phenomenon of motor learning development due to implementing movement constraint could be examined in fundamental or advanced skills ( Davids et al., 2008 ). For instance, this phenomenon may be tested for the countermovement jump (CMJ

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Hermann Zbinden-Foncea, Isabel Rada, Jesus Gomez, Marco Kokaly, Trent Stellingwerff, Louise Deldicque, and Luis Peñailillo

significant jump-performance improvements in elite female players. 18 To test jump ability, the countermovement jump (CMJ) is commonly used since it replicates jumps performed during a real game. Furthermore, the CMJ has been shown to be one of the best tests to detect neuromuscular fatigue due to its high

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Sahar Boozari, Mohammad Ali Sanjari, Ali Amiri, and Ismail Ebrahimi Takamjani

, proprioception, power, and pain. 2 , 3 , 5 , 6 Some have suggested that the effects of KT would be more beneficial if they also existed in functional situations, high-load tasks, or fatiguing circumstances. 5 – 7 A popular use of KT is in sports activities, such as countermovement jump (CMJ). 5 , 6 , 8 – 11

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Jeffrey D. Simpson, Ludmila Cosio-Lima, Eric M. Scudamore, Eric K. O’Neal, Ethan M. Stewart, Brandon L. Miller, Harish Chander, and Adam C. Knight

Wearing a weighted vest (WV) during daily living activities and training (WVDT), 1 – 3 or during daily living only, 4 – 6 is one form of external loading used to enhance countermovement jump (CMJ) and sprinting performance. The theoretical benefits of WVDT were supported in a seminal

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Malachy P. McHugh, Tom Clifford, Will Abbott, Susan Y. Kwiecien, Ian J. Kremenic, Joseph J. DeVita, and Glyn Howatson

Countermovement jump (CMJ) tests are commonly used to assess recovery of muscle function following strenuous exercise. Impairments in CMJ have been demonstrated on the days following various forms of exercise including drop jump protocols, 1 – 3 repeated sprint, and simulated field sport tests 4

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Kym J. Williams, Dale W. Chapman, Elissa J. Phillips, and Nick Ball

quasi-linear force–velocity relationship is reported, 4 with empirical evidence supporting a load equal to body mass as the optimal load to maximize system power during a countermovement jump (CMJ). 5 – 7 Long-term specialized training can have a profound influence on a muscle’s contractile profile, 8

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Adam Grainger, Paul Comfort, and Shane Heffernan

activities. 2 , 3 Evidence to support delayed restoration after “rugby match play” is well documented. 3 , 4 McLellan et al 4 assessed markers of postmatch fatigue in elite rugby league, showing that countermovement jump (CMJ) peak power was reduced for up to 48 hours and that creatine kinase and cortisol

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Andy Mitchell, Craig Holding, and Matt Greig

nonaffected limb in jump height ( P  = .014; P  = .687) and time ratio ( P  = .017; P  = .706). Figure 1 —The influence of previous injury on CMJ jump height and flight time:contraction time ratio. CMJ indicates countermovement jump aff, affected; Inj, injured; nonaff, nonaffected; noninj, noninjured. CMJ