Heat stress impairs proprioception but not running mechanics

K. Mtibaa; N. Zarrouk; O. Girard; J.H. Ryu; C. Hautier; S. Racinais

doi:10.1016/j.jsams.2019.07.008

Back

Heat stress impairs proprioception but not running mechanics

Journal article

Peer reviewed

Heat stress impairs proprioception but not running mechanics

K. Mtibaa, N. Zarrouk, O. Girard, J.H. Ryu, C. Hautier and S. Racinais

Journal of Science and Medicine in Sport, Vol.22(12), pp.In 1361-1366

2019

DOI: https://doi.org/10.1016/j.jsams.2019.07.008

Files and links (1)

url

Link to Published Version *Subscription may be requiredView

Abstract

Objectives To determine the effects of heat stress on ankle proprioception and running gait pattern. Design Counterbalanced repeated measures. Methods 12 trained runners performed a proprioception test (active movement discrimination) before and immediately after a 30 min, self-paced treadmill run in HOT (39 °C) and COOL (22 °C) ambient conditions. Velocity was imposed during the first and last minute (70% of maximal aerobic velocity, 13.3 ± 0.8 km h−1) for determination of running mechanics and spring–mass characteristics. Results Rectal (39.7 ± 0.4 vs. 39.4 ± 0.4 °C), skin (36.3 ± 1.1 vs. 31.8 ± 1.1 °C) and average body (38.3 ± 0.2 vs. 36.4 ± 0.4 °C) temperatures together with heart rate (178 ± 8 vs. 174 ± 6 bpm) and thermal discomfort (6.5 ± 0.5 vs. 4.3 ± 1.3) were all higher at the end of the HOT compared to COOL run (all p < 0.05). Distance covered was lower in HOT than COOL (−5.1 ± 3.6%, p < 0.001). Average error during the proprioception test increased after running in HOT (+11%, p < 0.05) but not in COOL (−2%). There was no significant difference for most segmental and joint angles at heel contact, except for a global increase in pelvis retroversion and decrease in ankle dorsi-flexion angles with time (p < 0.05). Step frequency decreased (−2.5 ± 3.6%) and step length increased (+2.6 ± 3.8%) over time (p < 0.05), independently of condition. Spring–mass characteristics remained unchanged (all p > 0.05). Conclusions Heat stress exacerbates thermal, cardiovascular and perceptual responses, while running velocity was slower during a 30 min self-paced treadmill run. Heat stress also impairs ankle proprioception during an active movement discrimination task, but it has no influence on gait pattern assessed at a constant, sub-maximal velocity.

Details

Title: Heat stress impairs proprioception but not running mechanics
Authors/Creators: K. Mtibaa (Author/Creator) - Florida State University
N. Zarrouk (Author/Creator) - Qatar Orthopaedic and Sports Medicine Hospital
O. Girard (Author/Creator) - Murdoch University
J.H. Ryu (Author/Creator) - Aspire Academy
C. Hautier (Author/Creator) - Université Claude Bernard Lyon 1
S. Racinais (Author/Creator) - Qatar Orthopaedic and Sports Medicine Hospital
Publication Details: Journal of Science and Medicine in Sport, Vol.22(12), pp.In 1361-1366
Publisher: Elsevier BV
Identifiers: 991005543776207891
Murdoch Affiliation: Murdoch Applied Sports Science Laboratory
Language: English
Resource Type: Journal article

Metrics

24 Record Views

5 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration; International collaboration
Citation topics: 1 Clinical & Life Sciences; 1.34 Orthopedics; 1.34.480 Foot and Ankle Disorders
Web Of Science research areas: Sport Sciences
ESI research areas: Clinical Medicine