The effect of muscle fatigue on the last stride before stepping down a curb

Variability in Obstacle Clearance May (Not) Indicate Cognitive Disorders in Alzheimer Disease

“…Previous results have shown that age-related deficits in vision, proprioception, cognition, and attention can negatively impact postural stability and lower limb kinematics when crossing obstacles, 36-38 mainly because obstacle avoidance is a complex task for elderly people. 32,39,40 Therefore, the deficits caused by aging in the musculoskeletal and sensorial systems 36-38 may be more striking than cognitive impairment when combined with a challenge walking, such as obstacle avoidance, indicating that gait variability during obstacle clearance may not indicate cognitive disorders in AD. Furthermore, both small number of individuals in each group (15) and the use of only 1 obstacle height (half of the knee height) require that our results should be performed with care.…”

Interactions of age and leg muscle fatigue on unobstructed walking and obstacle crossing

“…Maximum voluntary isometric contractions were performed in a leg press device [15,16]. A load cell with a precision of 0.98 N was used in combination with a signal amplifier (EMG System do Brasil Ltda.).…”

“…Sit-tostand movements were performed at a pre-determined cadence (30 cycles/min), using a metronome [15,16]. A standard chair (43 cm in height, 41 cm in width, 42 cm in depth) without arm rests was used for all participants.…”

“…Muscle fatigue in turn has been shown to affect the gait pattern [15][16][17][18][19][20] possibly due to reduced balance control [18,19]. The effects of leg muscle fatigue on walking of older adults were addressed in previous studies [17,18,20].…”

Prolonged cycling alters stride time variability and kinematics of a post-cycle transition run in triathletes

“…Activities that stimulate a fatigue response tend to lead to pronounced changes in movement 40 and increased movement variability [Barbieri et al, 2013]. Measures of movement variability 41 are considered to provide a general assessment of the integrity of the motor system.…”