alexa Comparison of Cardiorespiratory and Hormonal Responses
ISSN: 2161-0673

Journal of Sports Medicine & Doping Studies
Open Access

Like us on:
OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Research Article

Comparison of Cardiorespiratory and Hormonal Responses between Sustained Constant and Alternating Intensity Exercise

Spanoudaki S1*, Maridaki M1, Karatzanos E2, Bogdanis GC1, Spanoudaki C3 and Baltopoulos P1

1Department of Sports Medicine & Biology of Physical Activity, Faculty of Physical Education and Sports Science, National & Kapodistrian University of Athens, 41 Ethnikis Antistasis, Dafni, Greece

2Cardiopulmonary Exercise Testing and Rehabilitation Laboratory, Evgenidio Hospital, School of Medicine, National & Kapodistrian University of Athens, Greece, 20 Papadiamantopoulou Str., 115 28, Athens, Greece

3Neonatal Intensive Care Unit, General Hospital of Chania, Greece

*Corresponding Author:
Dr. Sofia S. Spanoudaki
Department of Sports Medicine & Biology of Physical Activity
Faculty of Physical Education and Sports Science
National & Kapodistrian University of Athens
Valtetsiou St, Vrilissia 15235, Athens, Greece
Tel: 0030–2108103282
Fax: 0030–2109708367
E-mail: [email protected]

Received Date: September 09, 2011; Accepted Date: January 06, 2012; Published Date: January 10, 2012

Citation: Spanoudaki S, Maridaki M, Karatzanos E, Bogdanis GC, Spanoudaki C, et al. (2012) Comparison of Cardiorespiratory and Hormonal Responses between Sustained Constant and Alternating Intensity Exercise. J Sport Medic Doping Studie 2:103. doi:10.4172/2161-0673.1000103

Copyright: © 2012 Spanoudaki S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Background: Cardiorespiratory and hormonal responses were investigated during and after prolonged exercise of constant and alternating exercise intensity. Methods: Ten healthy males underwent two main cycling exercise trials at the same overall power output, lasting one hour each. During the first trial, exercise intensity was constant at 70±5% VO2max, while during the second trial, exercise intensity was alternated between 47±2% VO2max for 40 s and 120% VO2max for 20 s. Results: Oxygen uptake (VO2) and heart rate (HR) were higher in constant compared with alternating intensity exercise (VO2: 32.5±6.6 vs. 29.8±5.9 ml/kg/min, p<0.05; HR: 152 ± 16 vs. 142 ± 15 b/min, p<0.05). Pulmonary ventilation, respiratory exchange ratio and blood lactate were similar in both trials. Plasma adrenaline and growth hormone during and 1 hour after exercise were similar in both trials, while nor-adrenaline was higher during constant intensity exercise (p<0.05). Significant time effects were found for all cardiorespiratory, lactate and hormonal parameters. Conclusions: Constant and alternating intensity exercise of the same mean intensity and duration provoked similar changes in terms of stress and blood- lactate, while VO2 and HR responses and nor-adrenaline concentration were higher when exercise intensity was constant, suggesting that constant exercise impose greater demand on the cardiovascular system.

Share This Page

Additional Info

Loading
Loading Please wait..
 
Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords