Laurie Rauch

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Exercise in the heat causes “central fatigue”, associated with reduced skeletal muscle recruitment during sustained isometric contractions. A similar mechanism may cause fatigue during prolonged dynamic exercise in the heat. The aim of this study was to determine whether centrally regulated skeletal muscle recruitment was altered during dynamic exercise in(More)
Increasing inspiratory oxygen tension improves exercise performance. We tested the hypothesis that this is partly due to changes in muscle activation levels while perception of exertion remains unaltered. Eleven male subjects performed two 20-km cycling time-trials, one in hyperoxia (HI, FiO2 40%) and one in normoxia (NORM, FiO2 21%). Every 2 km we measured(More)
OBJECTIVE To determine whether the length of a queue at a public hospital emergency department was associated with increased likelihood of patients' leaving without being seen by a physician and whether leaving adversely affected patients' health or affected their subsequent use of health care services. DESIGN Observational cohort. Patients were surveyed(More)
Previously, we examined the effects of carbohydrate (CHO) ingestion on glucose kinetics during exercise at 70% of maximum O2 uptake ( $$\dot V$$ O2,max). Here we repeat those studies in heavier cyclists (n=6 per group) cycling for 3 h at a similar absolute O2 uptake but at a lower (55% of $$\dot V$$ O2,max) relative exercise intensity. During exercise, the(More)
This study examines the acute effect of heart rate variability (HRV) biofeedback on anxiety and relaxation states. Eighteen healthy males exposed to work-related stress were randomized into an HRV biofeedback group (BIO) or comparative group (COM). The device used by the COM group appeared identical to the HRV biofeedback device, however, it did not provide(More)
INTRODUCTION A central fatigue theory proposes that force output during fatiguing exercise is limited to maintain homeostasis. The self-awareness of the body's homeostatic state is known as interoception. Brain regions thought to play a role in interoception, such as the insular and orbital frontal cortex, have been proposed as sites for the upstream(More)
We investigate the complexity and recurrence properties of human activity measured from forearm movement in individuals carrying out their normal daily routines. We show that complexity in activity decreases with age and speculate that this coincides with a reduction in healthy behaviour and could also indicate that one of the underlying physiological(More)
This article examines how pacing strategies during exercise are controlled by information processing between the brain and peripheral physiological systems. It is suggested that, although several different pacing strategies can be used by athletes for events of different distance or duration, the underlying principle of how these different overall pacing(More)
UNLABELLED Chronic levels of physical activity have been associated with increased dopamine (D2) receptors resulting in increased sensitivity to dopamine release. The catechol-O-methyltransferase enzyme, responsible for dopamine degradation, contains a functional polymorphism, which plays an important role in dopamine regulation within the prefrontal(More)
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