A5058126150- Thermoregulation and physiological responses
- Infrared Thermography in Medicine
- Heart Rate Variability and Autonomic Control
- Sports Performance and Training
- Muscle activation and electromyography studies
- Climate Change and Health Impacts
- Sports injuries and prevention
- Exercise and Physiological Responses
- Textile materials and evaluations
- Pressure Ulcer Prevention and Management
- High Altitude and Hypoxia
- Motor Control and Adaptation
- Fusion and Plasma Physics Studies
- Cardiovascular and exercise physiology
- Ergonomics and Musculoskeletal Disorders
- Advanced Sensor and Energy Harvesting Materials
Brock University
2015-2020
Wilfrid Laurier University
2020
Using intravenous infusion, we separated the physiologic consequences of 3% body mass dehydration from conscious awareness fluid replacement on time trial (TT) performance in heat. Eleven trained cyclists performed 90 min steady-state (50% V ˙ O 2 peak ) cycling followed by a self-paced 20-km TT hot-dry (35 °C, 10% relative humidity, wind speed 3.0 m/s) environment while euhydrated-not thirsty (EU-NT), euhydrated-thirsty (EU-T), dehydrated-not (DH-NT), or dehydrated-thirsty (DH-T). Thirst...
The large body of work demonstrating hyperthermic impairment neuromuscular function has utilized maximal isometric contractions, but extrapolating these findings to whole-body exercise and submaximal, dynamic contractions may be problematic. We isolated compared core skin temperature influences on an force task versus a position requiring maintenance joint angle. Surface electromyography (sEMG) was measured the flexor carpi radialis at 60% baseline voluntary contraction while either pushing...
New Findings What is the central question of this study? How do temperature manipulations affect motor unit (MU) properties during submaximal contractions to same relative percentage maximal force? main finding and its importance? MU recruitment patterns are affected by at forearm. However, relationship between potential amplitude threshold indicates no change order or recruitment. Additionally, firing rate was temperature, suggesting that smaller MUs more changes than larger MUs. Abstract...
To Examine the effect of inhibiting sympathetic function on cutaneous vasomotion in forearm and leg.Intradermal microdialysis fibers were placed leg, one as an untreated control (lactated Ringer's) other perfused with bretylium tosylate to block nerves. Skin blood flow was monitored using laser Doppler flowmetry. Baseline collected for 10 minutes before local skin temperature increased 42°C. Spectral analysis performed a Morlet wavelet.Bretylium during baseline (d=1.6, P<.05) leg (d=0.5,...
Abstract Objective Spectral analyses of laser‐Doppler flowmetry measures enable a simple and non‐invasive method to investigate mechanisms regulating skin blood flow. We assessed within‐day day‐to‐day variability cutaneous spectral analyses. Methods Eleven young, healthy males were tested twice in three identical sessions, with 19 24 days between visits, for total six tests. Wavelet data analyzed at rest, response local heating 42 44°C, during 5‐minutes PORH. did this frequency bands...
The initial cutaneous vasodilatory response to local skin heating is greater in the forearm than leg (1). While vasodilatation of primarily dependent on sensory nerves (2), their role unknown. We compared contribution regulating and using a anaesthetic (EMLA) cream.
Under normothermic conditions, the skin of leg has higher sympathetic activity than forearm; by contrast, after locally heating to 42°C, forearm activity. Work in human free flaps suggested that vasomotion waves around 0.021–0.52 Hz corresponded PURPOSE No study verified low‐frequency oscillations corresponding (0.021–0.052 Hz) intact, healthy skin. We hypothesized blockade would reduce power this band under conditions as well response local heating. examined effects acute, localized nerve...