Abstract
123 healthy adults (77 female, 46 male), aged 18-36years, completed the Mental and Physical State and Trait Energy and Fatigue Scale. Using a median split for each fatigue variable, participants were placed into "low" or "high" fatigue categories. Gait variability was defined as the asymmetry of lateral step variability (ALSV) and coefficient of variation (CV) of gait speed, stride length and double limb (DL) support during overground walking. Males with low state PF had greater ALSV than females with low state PF (p=0.05, η2p=0.07) and males with high state PF (p=0.007, η2p=0.15). Females with high trait MF had greater CV of gait speed than females with low trait mental fatigue (p=0.02, η2p=0.08). Males with low trait MF had greater CV of gait speed (p=0.01, η2p=0.10) and stride length (p=0.002, η2p=0.17) than females with low trait MF. CV of DL support did not vary based on fatigue level or sex (p≥0.11). There are sex-specific differences in the impact of state PF on asymmetry of lateral step variability and trait MF on the variability of gait speed and stride length.
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