A5101514088- Heart Rate Variability and Autonomic Control
- Cardiovascular and exercise physiology
- Muscle activation and electromyography studies
- Cardiovascular Syncope and Autonomic Disorders
- Sports Performance and Training
- Non-Invasive Vital Sign Monitoring
- Neuroscience of respiration and sleep
- Respiratory Support and Mechanisms
- American Constitutional Law and Politics
- Motor Control and Adaptation
- Neuroscience and Neural Engineering
- Migration and Labor Dynamics
- Exercise and Physiological Responses
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Sleep and related disorders
- Optical Imaging and Spectroscopy Techniques
- Cardiovascular Health and Disease Prevention
- Asthma and respiratory diseases
- Political Philosophy and Ethics
- High Altitude and Hypoxia
- Sports injuries and prevention
- Advanced Sensor and Energy Harvesting Materials
- Cardiovascular Effects of Exercise
- Child Nutrition and Feeding Issues
- Reproductive Biology and Fertility
Monash Medical Centre
2025
Monash Health
2025
Monash University
2025
AstraZeneca (United States)
2022-2024
National Jewish Health
2009-2023
University of Colorado Denver
2009-2023
Université Paris-Saclay
2023
Imperial College London
2023
The Ohio State University
2023
University of St Andrews
2023
The electrically evoked isometric properties of the triceps surae have been studied in young (22 yr) and elderly (69 men women. results show that subjects had an increased time to peak tension (TPT) twitch, a lower specific (force/cross section area), showed greater relative force loss when subjected standard "fatigue" test procedure than surae. respective figures for TPT, tension, fatigue index (FI) were 147 +/- 15 ms (male), 143 8 (female), 19.5 N/cm2 0.52 0.16 0.37 0.09 (female) elderly,...
A combination of sympathoexcitation and vagal withdrawal increases heart rate (HR) during exercise, however, their specific contribution to arterial baroreflex sensitivity remains unclear. Eight subjects performed 25 min bouts exercise at a HR 90, 120, 150 beats min-1, respectively, with without metoprolol (0.16 +/- 0.01 mg kg(-1); mean S.E.M.) or glycopyrrolate (12.6 1.6 microg kg-1). Carotid (CBR) function was determined using 5 s pulses neck pressure (NP) suction (NS) from +40 -80 Torr,...
1 This study examined the alterations in calcium release, uptake and ATPase activity of skeletal muscle sarcoplasmic reticulum response to a bout intense dynamic knee extensor exercise, relationship between these changes contractile characteristics human quadriceps. 2 In biopsy samples taken from vastus lateralis, release were significantly depressed (P < 0.01 0.05, respectively) immediately following exercise with no alteration Ca2+-ATPase activity. 3 A 33 % reduction maximum voluntary...
The purpose of the present study was to investigate cardiovascular responses muscle metaboreflex- and concurrent stretch-induced mechanoreflex activation. Eight subjects (7 males, 1 female) performed 90 s isometric calf plantarflexion at 0, 30, 50 70% maximum voluntary contraction. During exercise for 3.5 min postexercise, circulatory occlusion (PECO) ensured by inflation a thigh cuff. After PECO stretched 60 (Stretch). Heart rate (HR; assessed from ECG), blood pressure (BP; Finapres) phase...
Endurance trained athletes are well known to have low resting heart rates, with values below 30 beats min−1 reported. Such rates result from long periods of endurance training (Carter et al. 2003). We argue here that an increase in cardiac parasympathetic activity (vagal tone) is a major contributor. The factors contributing rhythm complex but essentially there three, the (vagal) nerves, sympathetic nerves and pacemaker cells, set intrinsic rate. At rest healthy individuals rate determined...
ABSTRACT Objectives Although child and adolescent mental health behavioural presentations to hospital emergency departments (EDs) increased during the first 2 years of COVID‐19 pandemic (2020 2021), little is known about characteristics these presentations. We aimed compare demographic, clinical psychosocial profiles paediatric Australian EDs before after onset pandemic. Methods conducted a retrospective observational study 100 randomly sampled by children (6–11‐year‐olds) adolescents...
1. The effect of calf raise training the dominant limb on pressor response to isometric exercise triceps surae was examined in trained and contralateral untrained limb. Blood pressure heart rate responses electrically evoked voluntary at 30 % maximum contraction (MVC), followed by post-exercise circulatory occlusion (PECO), were compared before after a 6 week period. 2. In diastolic blood rise seen during reduced 27 training. However, PECO not significantly affected. 3. During limb, 28 %,...
We examined whether spontaneous baroreflex modulation of heart rate and other indexes cardiac vagal tone could be altered by passive stretch the human calf muscle during graded concurrent activation metaboreflex. Ten healthy subjects performed four trials: a control trial, resting for 1.5 min (0% trial); or one-legged isometric plantar flexor exercise at 30, 50, 70% maximal voluntary contraction. The incremental increases in blood pressure (BP) caused were then partially sustained subsequent...
This article uses life history calendar (LHC) data from coastal Ghana and event statistical methods to examine inter-regional migration for men women, focusing on four specific types: rural-urban, rural-rural, urban-urban, urb
The purpose of this study was to examine the effects a total body strength training program on oxygen uptake (VO2), heart rate (HR), systolic blood pressure (SBP), and product (RPP) during submaximal walk weight-loaded walking test in healthy women 60-77 years old.The (2 mph 3.5% grade) took place stage 3 graded exercise test. task consisted treadmill at 2 while carrying box weighing 40% maximum isometric elbow flexion strength. trained three times per week for approximately 1 hour session...
1. Changes in heart rate and blood pressure were observed, nine healthy subjects, during after voluntary electrically evoked isometric contractions of the triceps surae under conditions local circulatory arrest. 2. The progressive increases seen 2 min at 30% maximal contraction not significantly different two conditions. On cessation but with arrest maintained, fell to control levels while a similar though still elevated level both Elevated was maintained for until occlusion removed; however...
New Findings What is the central question of this study? Classically, stimulation thin‐fibre skeletal muscle afferents, via application postexercise circulatory occlusion (PECO) at rest, fails to generate ventilatory responses. We used a new experimental protocol examine whether involvement these metabosensitive afferents in control can only be revealed during exercise, when other potentially synergistic inputs that increase respiratory drive are activated. main finding and its importance?...
Mycology is a subject many practitioners seem to want avoid. It always seems be easier treat empirically or send culture off the lab. If you trust Doing your own mycology tests takes time and interest while trying remember all learned for boards promptly forgot. get beyond stage of remembering that once knew some mycology, do it as painlessly possible, Dr Elewski's book exactly tool need. This not an all-inclusive resource. more survey appropriate dermatologists rather than microbiologists....
This study investigated the cardiovascular response to a standard external muscle compression during concomitant metaboreflex stimulation of varying intensity in human calf muscle. Eleven healthy male subjects (mean (s.d.) age, 26 (5.6) years; height, 177 (5) cm; weight, 74.3 (6.8) kg) were seated an isometric dynamometer with angle knee at 90 deg, and ankle 85 deg. After 150-s rest period, asked either perform plantar flexion 20, 30, 40, 50, 60, 70 or 80% previously determined maximum...
We sought to examine the regulation of cerebral blood flow during 10 min recovery from mild, moderate, and heavy cycling exercise by measuring middle artery velocity (MCA V). Transfer function analyses between changes in arterial pressure MCA V were used assess frequency components dynamic autoregulation (CA). After mild moderate exercise, decreases mean (MAP) Vm) small. However, following MAP was rapidly markedly reduced, whereas Vm decreased slowly (-23 +/- 4 mmHg -4 1 cm/s after for Vm,...
Key points Recent evidence indicates a role for group III/IV muscle afferents in reflex control of the human ventilatory response to exercise. Dyspnoea chronic obstructive pulmonary disease (COPD) may be linked this response. This study shows that activation metaboreflex causes COPD patients but not healthy controls. abnormal involvement ventilation which contributing factor exercise dyspnoea. Abstract Blockade thin fibre afferent feedback during dynamic reduces hyperpnoea health and (COPD)....