Pubblicazioni

Autori:

Monte, Andrea; Tecchio, Paolo; Nardello, Francesca; Bachero-Mena, Beatriz; Ardigò, Luca Paolo; Zamparo, Paola

Titolo:

The influence of muscle-belly and tendon gearing on the energy cost of human walking

Anno:

2022

Tipologia prodotto:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Lingua:

Inglese

Formato:

A Stampa

Referee:

Sì

Nome rivista:

SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS

ISSN Rivista:

0905-7188

N° Volume:

32

Numero o Fascicolo:

5

Editore:

Blackwell Munksgaard:PO Box 2148, Periodicals Department, DK-1016 Copenhagen K Denmark:011 45 33 755913, EMAIL: agentservices@oxon.blackwellpublishing.com, INTERNET: http://www.blackwellmunksgaard.com, Fax: 011 45 77 333377

Intervallo pagine:

844-855

Parole chiave:

belly gearing; cost of transport; human locomotion; pendular energy recovery

Breve descrizione dei contenuti:

This study combines metabolic and kinematic measurements at the whole-body level, with EMG and ultrasound measurements to investigate the influence of muscle-tendon mechanical behaviour on the energy cost (Cnet ) of walking (from 2 to 8 km·h-1 ). Belly gearing (Gb = Δmuscle-belly length/Δfascicles length) and tendon gearing (Gt = ∆muscle-tendon unit length/∆muscle-belly length) of vastus lateralis (VL) and gastrocnemius medialis (GM) were calculated based on ultrasound data. Pendular energy recovery (%R) was calculated based on kinematic data, whereas the cumulative activity per distance travelled (CMAPD) was calculated for the VL, GM, tibialis anterior and biceps femoris as the ratio between their EMG activity and walking speed. Finally, total CAMPD (CMAPDTOT ) was calculated as the sum of the CMAPD of all the investigate muscles. Cnet and CMAPDTOT showed a U-shaped behaviour with a minimum at 4.2 and 4.1 km·h-1 , respectively; while %R, VL and GM belly gearing showed an opposite trend, reaching a maximum (60±5%, 1.1±0.1 and 1.5±0.1, respectively) between 4.7 and 5 km·h-1 . Gt was unaffected by speed in GM (3.5±0.1) and decreased as a function of it in VL. A multiple stepwise linear regression indicated that %R has the greatest influence on Cnet, followed by CMAPDTOT and GM belly gearing. The role of Gb on Cnet could be attributed to its role in determining muscle work: when Gb increases, fascicles shortening decreases compared to that of the muscle-belly, thereby reducing the energy cost of contraction.

Note:

Luca Paolo Ardigò and Paola Zamparo share last authorship

Pagina Web:

https://doi.org/10.1111/sms.14142

Id prodotto:

124902

Handle IRIS:

11562/1057624

ultima modifica:

17 novembre 2022

Citazione bibliografica:

Monte, Andrea; Tecchio, Paolo; Nardello, Francesca; Bachero-Mena, Beatriz; Ardigò, Luca Paolo; Zamparo, Paola, The influence of muscle-belly and tendon gearing on the energy cost of human walking «SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS» , vol. 32 , n. 5 , 2022 , pp. 844-855

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