Home > Riviste > The Journal of Sports Medicine and Physical Fitness > Fascicoli precedenti > The Journal of Sports Medicine and Physical Fitness 2016 October;56(10) > The Journal of Sports Medicine and Physical Fitness 2016 October;56(10):1206-13

ULTIMO FASCICOLO
 

ARTICLE TOOLS

Estratti

THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport


Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111


eTOC

 

ORIGINAL ARTICLES  EPIDEMIOLOGY AND CLINICAL MEDICINE


The Journal of Sports Medicine and Physical Fitness 2016 October;56(10):1206-13

lingua: Inglese

Muscle damage and immune responses to prolonged exercise in environmental extreme conditions

Emad S. HASSAN

Department of Sports Health Science, College of Physical Education, Assiut University, Assiut, Egypt


PDF  


BACKGROUND: This study aimed to investigate the effect of prolonged exercise with and without a thermal clamp on leukocyte cell, stress hormones, cytokine and muscle damage responses.
METHODS: Fifteen healthy male volunteers (means±SD: age 22±3 yr; mass 75.8±3.2 kg; maximal oxygen uptake 55±7 mL/min/kg) randomly completed four chamber trials of 1 hour each, in different environment and separated by 7 days. Trials were: 1) exercise induced heating (EX-heating [EX-H]: temperature/humidity, 38° C/50%); 2) exercise with a thermal clamp (EX-cooling [EX-C]: temperature/humidity, 18° C/50%); 3) passive heating (PA-H: temperature/ humidity, 38° C/50%); 4) passive cooling (PA-C: temperature/ humidity, 18° C/50%). EX-H and EX-C were composed of 1h treadmill runs at 80% individual anaerobic threshold (IAT). Blood samples were collected at pre-post, and 1h postenvironments exposure.
RESULTS: Compared to EX-H, exercise-induced increases in core temperature, heart rate, cortisol, human growth hormone (hGH)), Interleukin-6 (IL-6), leukocyte counts and creatine kinase (CK) and Myoglobin (Mb) were significantly (P<0.01) more pronounced than in EX-C.
CONCLUSIONS: These results suggest that the additional impact of elevated ambient temperatures on stress responses to endurance exercise in trained subjects seems to affect primarily the hormonal systems and resulting changes in leukocyte number, creatine kinase, Myoglobin and interleukine-6.

inizio pagina

Publication History

Per citare questo articolo

Corresponding author e-mail

e.hassan@aun.edu.eg