Methods for calculating internal mechanical work: comparison using elite runners

Purkiss, Sheila B.A; Robertson, D. Gordon E.

doi:10.1016/s0966-6362(03)00015-8

Cited by 10 publications

(4 citation statements)

References 14 publications

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“…2. Although part of the decrease/increase of total energy is caused by tendon stretch and recoil during running (Purkiss and Robertson, 2003), metabolic energy is expended both for positive (concentric) and negative (eccentric) work (Kuo, 2007), the latter playing an important role in decelerations (Dellal et al, 2010).…”

Section: Metabolic Cost Estimationmentioning

confidence: 99%

“…4. During running, more than 55% of total negative work is done at the knee, since when producing braking forces, muscles at this joint work as stabilizers and shock absorbers (hips and ankles contribution to negative work is 25% and 10%, respectively (Purkiss and Robertson, 2003)).…”

Section: Metabolic Cost Estimationmentioning

confidence: 99%

“…Historically, mechanical work of locomotion was investigated in linear walking and running, and the relationship between mechanical work and metabolic energy has been addressed (Cavagna and Kaneko, 1977): some approaches focused on external work, others introduced internal (Purkiss and Robertson, 2003) and collisions-related negative work (Donelan et al, 2002;Ruina et al, 2005). However, the feasibility of these methods is unclear when applied to CoDs, and their practical use remains difficult.…”

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confidence: 99%

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Kinematic algorithm to determine the energy cost of running with changes of direction

Zago

Esposito

Rausa

et al. 2018

Journal of Biomechanics

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. KINEMATIC ALGORITHM TO DETERMINE THE ENERGY COST OF RUNNING WITH CHANGES OF DIRECTION Submission type: original investigation

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Section: Metabolic Cost Estimationmentioning

confidence: 99%

Section: Metabolic Cost Estimationmentioning

confidence: 99%

mentioning

confidence: 99%

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Kinematic algorithm to determine the energy cost of running with changes of direction

Zago

Esposito

Rausa

et al. 2018

Journal of Biomechanics

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“…It is helpful also to analyze ergonomic conditions, especially while performing load lifting [4][5]. Another objective may consist in identifying some performance parameters when considering athletic exercises [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Energetic versus sthenic optimality criteria for gymnastic movement synthesis

et al. 2006

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Dynamic synthesis of human movements raises the question of the selection of a suitable performance criterion able to generate proper dynamic behaviors. Two quite different criteria are likely to be appropriate candidates: the minimum effort cost (or sthenic criterion) and the minimum energy cost. The paper is aimed at clarifying the dynamic effects of these two fundamental criteria when considering movements executed with liveliness as they are in gymnastic. It is well known that the former cost generates movements with smooth dynamics. A special attention is devoted to the latter. The optimal control theory shows that minimizing the energy consumption results in actuating inputs of bang-off-bang type producing momentum impulses. When achieving dynamic synthesis, this criterion makes necessary to account for bounds set on driving torques. Moreover, when dealing with one-sided contacts, as in floor handstands, the unilaterality of contact forces must be explicitly accounted for since it tends to be infringed by impulsive efforts.Numerical simulations of these formal properties are carried out using a parametric optimization technique, and considering the raising phase of floor handstands. It is shown that the energetic criterion tends to generate movements which exhibit similarities with their real counterpart performed by an expert gymnast. Conversely, the sthenic criterion produces movements quite different. But, a salient fact is that these ones proved to be easier to perform by young beginners. As a result, they could help to coach novice gymnasts.Keywords: dynamic synthesis, parametric optimization, minimum energy cost, minimum effort cost, handstand exercise. e s J J J (10) which gives s J and e J when  takes the values 0 and 1 respectively.

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Lower limb contribution in kayak performance: modelling, simulation and analysis

2010

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Methods for calculating internal mechanical work: comparison using elite runners

Cited by 10 publications

References 14 publications

Kinematic algorithm to determine the energy cost of running with changes of direction

Kinematic algorithm to determine the energy cost of running with changes of direction

Energetic versus sthenic optimality criteria for gymnastic movement synthesis

Lower limb contribution in kayak performance: modelling, simulation and analysis

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