Effect of prolonged free-walking fatigue on gait and physiological rhythm

Yoshino, Kohzoh; Motoshige, Tomoko; Araki, Tsutomu; Matsuoka, K.

doi:10.1016/j.jbiomech.2003.11.031

Cited by 88 publications

(83 citation statements)

References 22 publications

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“…The results indicated a reduction in TA after fatiguing the quadriceps. This is in agreement with a study by Yoshino et al [22] who found that fatigue reduces back acceleration and increases the loading rate during a gait cycle. Lockhart et al [8] indicated that reduced push-off force of the stance leg further reduced TA and increased RCOF and risk of slip initiation.…”

Section: Discussionsupporting

confidence: 93%

Effects of quadriceps fatigue on the biomechanics of gait and slip propensity

2008

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This study examines how lower extremity fatigue of the quadriceps alters gait variables related to slip propensity. Sixteen healthy young adults were recruited to walk across vinyl floor surfaces in states of fatigue and no fatigue. Kinematic and kinetic data were collected using a three-dimensional motion analysis system and force plates. The results indicated a significant increase in both the heel contact velocity and required coefficient of friction and a decrease in the transitional acceleration of the whole body center of mass and peak knee joint moment in the fatigue trials. Thus, suggesting that slip propensity could increase with fatigue. Additionally, there was increased knee flexion and reduced ankle dorsiflexion at the heel contact phase of the gait cycle during fatigue trials. These findings provide new insights into the biomechanical relationship between localized muscle fatigue and gait parameters associated with slip propensity. The present study concluded that localized muscle fatigue affects gait parameters and hence can be considered as a potential risk factor for slipinduced falls.

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Section: Discussionsupporting

confidence: 93%

Effects of quadriceps fatigue on the biomechanics of gait and slip propensity

2008

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“…These halting movements were often sporadic in nature, with no association with step number or trial number, and therefore the reasons for this random unsteadiness were difficult to ascertain. It could be related to physical constraints, such as decreased strength (DeVita and Hortobagyi, 2000) or flexibility (Kerrigan et al, 2001), or even exercise fatigue, which is known to affect gait in humans with evidence of poorer dynamic stability (Wojtys et al, 1996;Yoshino et al, 2004;Granata and Gottipati, 2008). From personal observations, the chickens often became breathless with the mild exertion of walking, and thus needed frequent rest between trials.…”

Section: Discussionmentioning

confidence: 99%

The gait dynamics of the modern broiler chicken: A cautionary tale of selective breeding

Paxton

Daley

Corr

et al. 2013

Journal of Experimental Biology

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SUMMARYOne of the most extraordinary results of selective breeding is the modern broiler chicken, whose phenotypic attributes reflect its genetic success. Unfortunately, leg health issues and poor walking ability are prevalent in the broiler population, with the exact aetiopathogenesis unknown. Here we present a biomechanical analysis of the gait dynamics of the modern broiler and its two pureline commercial broiler breeder lines (A and B) in order to clarify how changes in basic morphology are associated with the way these chickens walk. We collected force plate and kinematic data from 25 chickens (market age), over a range of walking speeds, to quantify the three-dimensional dynamics of the centre of mass (CoM) and determine how these birds modulate the force and mechanical work of locomotion. Common features of their gait include extremely slow walking speeds, a wide base of support and large lateral motions of the CoM, which primarily reflect changes to cope with their apparent instability and large body mass. These features allowed the chickens to keep their peak vertical forces low, but resulted in high mediolateral forces, which exceeded fore-aft forces. Gait differences directly related to morphological characteristics also exist. This was particularly evident in Pureline B birds, which have a more crouched limb posture. Mechanical costs of transport were still similar across all lines and were not exceptional when compared with more wild-type ground-running birds. Broiler chickens seem to have an awkward gait, but some aspects of their dynamics show rather surprising similarities to other avian bipeds.

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“…The decreased stroke rate variability observed in the overall population during the second 100-m of the butterfly, backstroke and freestyle events does not confirm the increased stroke rate variability observed with fatigue in walking and running events (Candeau et al, 1995;Slawinski et al, 2001;Yoshino et al, 2004). In these events, increasing stroke rate variability with fatigue was interpreted as the consequence of the perturbation of the anterioposterior and vertical movements of the centre of mass (Slawinski et al, 2001).…”

Section: Variability In Stroke Frequency: Fatigue Effectsmentioning

confidence: 94%