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

can derive other biomechanical metrics describing the jump performance, such as force, power, velocity, and center-of-mass position. Force data derived from inertial sensors have been shown to agree well with simultaneously recorded force plate data. 16 However, although jump heights derived from

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Lotte L. Lintmeijer, A.J. “Knoek” van Soest, Freek S. Robbers, Mathijs J. Hofmijster and Peter J. Beek

prescribed levels of training intensity. From a biophysical perspective, average mechanical power output (hereafter called “power output”) over one or more stroke cycles constitutes a suitable measure to control rowers’ compliance with training intensity as it is (1) strongly related to a rower’s rate of

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Irineu Loturco, Timothy Suchomel, Chris Bishop, Ronaldo Kobal, Lucas A. Pereira and Michael McGuigan

Maximum dynamic strength assessments, also called 1-repetition maximum (1RM) tests, are widely used by coaches and researchers to both evaluate neuromuscular performance and determine training loads. 1 The prescription of strength–power training is usually based on different percentages of 1RM

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Owen Jeffries, Mark Waldron, Stephen D. Patterson and Brook Galna

Pacing refers to an athlete’s distribution of work or energy across an event. 1 , 2 Athletes vary their physical output (ie, mechanical power output) to accommodate physiological or psychological constraints, for strategic racing purposes, or due to changing environmental factors. 2 , 3

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María Hernández, Fabrício Zambom-Ferraresi, Pilar Cebollero, Javier Hueto, José Antonio Cascante and María M. Antón

 al., 2011 ). However, it is not entirely clear whether muscle strength and muscle power are involved in the physical activity levels of older men with COPD. The peripheral muscle dysfunction of the lower limbs observed in older men with COPD is characterized by a reduction in the maximum muscle strength and

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Bareket Falk and Raffy Dotan

Measurement of Aerobic Power—Why is it Important? Maximal aerobic power ( V ˙ O 2 max ) is one of the 2 main constituents of aerobic capacity—the other one being aerobic endurance (percentage of V ˙ O 2 max that can be maintained for given distances or durations). Aerobic endurance is difficult

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

Mechanical power ( F · v ) is considered a determinant of athleticism. 1 In isolated joint actions, the force–velocity relationship is a hyperbolic curve, with power maximized at approximately 15% to 30% of absolute contractile force. 2 , 3 However, during dynamic multisegmental movements, a

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Frank E. DiLiberto and Deborah A. Nawoczenski

It is important to continue to expand the biomechanical profile of midfoot function beyond kinematics and include kinetic measurements, such as power. As the external measurements of power are representative of internal energy generating mechanisms, 1 incorporating kinetics into the biomechanical

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Michael J.A. Speranza, Tim J. Gabbett, David A. Greene, Rich D. Johnston, Andrew D. Townshend and Brett O’Farrell

professional rugby league players. 12 – 15 Well-developed acceleration (over a 10-m sprint) and lower-body muscle power were associated with superior tackling ability in elite junior and professional rugby league players. 12 – 14 Furthermore, maximal squat and bench press, as well as peak power of a

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Emma K. Zadow, Cecilia M. Kitic, Sam S.X. Wu, Stuart T. Smith and James W. Fell


To assess the validity of power output settings of the Wahoo KICKR Power Trainer (KICKR) using a dynamic calibration rig (CALRIG) over a range of power outputs and cadences.


Using the KICKR to set power outputs, powers of 100–999 W were assessed at cadences (controlled by the CALRIG) of 80, 90, 100, 110, and 120 rpm.


The KICKR displayed accurate measurements of power of 250–700 W at cadences of 80–120 rpm with a bias of –1.1% (95% limits of agreement [LoA] –3.6% to 1.4%). A larger mean bias in power was observed across the full range of power tested, 100–999 W (4.2%, 95% LoA –20.1% to 28.6%), due to larger biases of 100–200 and 750–999 W (4.5%, 95% LoA –2.3% to 11.3%, and 13.0%, 95% LoA –24.4% to 50.3%), respectively.


Compared with a CALRIG, the KICKR has acceptable accuracy reporting a small mean bias and narrow LoA in the measurement of power output of 250–700 W at cadences of 80–120 rpm. Caution should be applied by coaches and sports scientists when using the KICKR at power outputs of <200 W and >750 W due to the greater variability in recorded power.