Treadmill measurement of the force‐velocity relationship and power output in subjects with different maximal running velocities

Jaskólska, Anna; Goossens, P.; Veenstra, B.; Jaskólskp, A.; Skinner, James S.

doi:10.1080/15438629909512537

Cited by 16 publications

(18 citation statements)

References 16 publications

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“…; mean R 2 = 0.89). These results were expected from previous treadmill findings (Jaskolska et al., ; Morin et al., , ) despite the fact that some of the sprint mechanics variables differ between treadmill and overground running (McKenna & Riches, ). Regarding the individual P‐V relationships, the quadratic models present lower coefficients of determination (Fig.…”

Section: Discussionsupporting

confidence: 86%

Sprint mechanics in world‐class athletes: a new insight into the limits of human locomotion

Rabita

Dorel

Slawinski

et al. 2015

Scandinavian Med Sci Sports

302

430

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The objective of this study was to characterize the mechanics of maximal running sprint acceleration in high-level athletes. Four elite (100-m best time 9.95-10.29 s) and five sub-elite (10.40-10.60 s) sprinters performed seven sprints in overground conditions. A single virtual 40-m sprint was reconstructed and kinetics parameters were calculated for each step using a force platform system and video analyses. Anteroposterior force (FY), power (PY), and the ratio of the horizontal force component to the resultant (total) force (RF, which reflects the orientation of the resultant ground reaction force for each support phase) were computed as a function of velocity (V). FY-V, RF-V, and PY-V relationships were well described by significant linear (mean R(2) of 0.892 ± 0.049 and 0.950 ± 0.023) and quadratic (mean R(2) = 0.732 ± 0.114) models, respectively. The current study allows a better understanding of the mechanics of the sprint acceleration notably by modeling the relationships between the forward velocity and the main mechanical key variables of the sprint. As these findings partly concern world-class sprinters tested in overground conditions, they give new insights into some aspects of the biomechanical limits of human locomotion.

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Section: Discussionsupporting

confidence: 86%

Sprint mechanics in world‐class athletes: a new insight into the limits of human locomotion

Rabita

Dorel

Slawinski

et al. 2015

Scandinavian Med Sci Sports

302

430

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“…The default torque was measured by requiring the subject to stand still and by increasing the driving torque value until observing a movement of the belt >2 cm during 5 s. This default torque setting as a function of belt friction is in line with previous motorized treadmill studies (6,12,14,15) and with the detailed discussion by McKenna and Riches (19) in their recent study comparing "torque treadmill" sprint to overground sprint. Motor torque of 160% of the default value was selected after several preliminary measurements (data not shown) comparing various torques because (i) it allowed subjects to sprint in a comfortable manner and produce maximal effort without risking loss of balance and (ii) higher torques (180% and 200%) caused loss of balance in some subjects.…”

Section: Mechanical Variablessupporting

confidence: 55%

Technical Ability of Force Application as a Determinant Factor of Sprint Performance

Morin

Édouard

Samozino

2011

Medicine &Amp; Science in Sports &Amp; Exercise

356

419

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“…In addition to this power output capability, the F–v mechanical profile (characterized by the slope of the F–v relationship) has recently been shown to influence maximal jumping performances, independently from the effect of P max , with the existence of an individual optimal F–v profile characterizing the best balance, for a given subject, between force and velocity qualities to maximize performances (Samozino et al., , ). These results suggest that the F–v mechanical profile in sprint running, which shows high inter‐individual differences (Jaskolska et al., ; Morin et al., ), can also be interesting to consider and adjust by individualized training loads and exercises. Finally, recent studies showed that sprint performances (6‐s sprints, 100‐m events, repeated sprints) are related more to the effectiveness of force application to the ground than to the total force developed by lower limbs (Morin et al., , ; Rabita et al., ).…”

mentioning

confidence: 93%

A simple method for measuring power, force, velocity properties, and mechanical effectiveness in sprint running

Samozino

Rabita

Dorel

et al. 2015

Scandinavian Med Sci Sports

341

634

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This study aimed to validate a simple field method for determining force- and power-velocity relationships and mechanical effectiveness of force application during sprint running. The proposed method, based on an inverse dynamic approach applied to the body center of mass, estimates the step-averaged ground reaction forces in runner's sagittal plane of motion during overground sprint acceleration from only anthropometric and spatiotemporal data. Force- and power-velocity relationships, the associated variables, and mechanical effectiveness were determined (a) on nine sprinters using both the proposed method and force plate measurements and (b) on six other sprinters using the proposed method during several consecutive trials to assess the inter-trial reliability. The low bias (<5%) and narrow limits of agreement between both methods for maximal horizontal force (638 ± 84 N), velocity (10.5 ± 0.74 m/s), and power output (1680 ± 280 W); for the slope of the force-velocity relationships; and for the mechanical effectiveness of force application showed high concurrent validity of the proposed method. The low standard errors of measurements between trials (<5%) highlighted the high reliability of the method. These findings support the validity of the proposed simple method, convenient for field use, to determine power, force, velocity properties, and mechanical effectiveness in sprint running.

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Treadmill measurement of the force‐velocity relationship and power output in subjects with different maximal running velocities

Cited by 16 publications

References 16 publications

Sprint mechanics in world‐class athletes: a new insight into the limits of human locomotion

Sprint mechanics in world‐class athletes: a new insight into the limits of human locomotion

Technical Ability of Force Application as a Determinant Factor of Sprint Performance

A simple method for measuring power, force, velocity properties, and mechanical effectiveness in sprint running

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