Sex-Related Differences in Self-Paced All Out High-Intensity Intermittent Cycling: Mechanical and Physiological Responses

Author(s)

Panissa, Valeria L. G. ^[1] ; Julio, Ursula F. ^[1] ; Franca, Vanessa ^[2] ; Lira, Fabio S. ^[2] ; Hofmann, Peter ^[3] ; Takito, Monica Y. ^[4] ; Franchini, Emerson ^[1]

Affiliation

^[1] Univ Sao Paulo, Sch Phys Educ & Sport, Dept Sport, Av Prof Mello Morais 65, BR-05508900 Sao Paulo, SP - Brazil

^[2] Univ State Estadual Paulista UNESP, Dept Phys Educ, Exercise & Immunometab Res Grp, Presidente Prudente, SP - Brazil

^[3] Graz Univ, Inst Sports Sci Exercise Physiol, Training & Training Therapy Res Grp, A-8010 Graz - Austria

^[4] Univ Sao Paulo, Sch Phys Educ & Sport, Dept Human Movement Pedag, Av Prof Mello Morais 65, BR-05508900 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF SPORTS SCIENCE AND MEDICINE; v. 15, n. 2, p. 372-378, JUN 2016.
• Web of Science Citations: 5

Abstract

The purpose of this study was to compare sex-related responses to a self-paced all out high-intensity intermittent exercise (HIIE). 9 women and 10 men were submitted to a maximal incremental test (to determine maximum aerobic power - MAP and VO2peak), and an HIIE cycling (60x8s: 12s, effort: pause). During the protocol the mean value of (V) over dotO(2) and heart rate for the entire exercise (VO2total and HRtotal) as well as the values only in the effort or pause ((V) over dotO(2effort), VO2pause and HReffort and HRpause) relative to VO2peak were measured. Anaerobic power reserve (APR), blood lactate {[}La] and the respiratory exchange ratio (RER) were also measured. These variables were compared between men and women using the unpaired t test. Men used greater APR (109 +/- 12%MAP vs 92 +/- 6%MAP) with similar (V) over dotO(2total) (74 +/- 7 vs 78 +/- 8% VO2peak), however, when effort and pause were analysed separately, (V) over dotO(2effort) (80 +/- 9 vs 80 +/- 5%VO2peak) was similar between sexes, while (V) over dotO(2pause) was lower in men (69 +/- 6% vs 77 +/- 11% VO2peak, respectively). Women presented lower power decrement (30 +/- 11 vs 11 +/- 3%), RER (1.04 +/- 0.03 vs 1.00 +/- 0.02) and {[}La](peak) (8.6 +/- 0.9 vs 5.9 +/- 2.3 mmol.L-1). Thus, we can conclude that men self-paced HIIE at higher APR but with the same cardiovascular/aerobic solicitation as women. (AU)

• FAPESP's process: 11/22862-9 - Acute effect of continuous moderate-intensity or high-intensity intermittent exercise in the post-exercise feeding behavior.
• Grantee: Valéria Leme Gonçalves Panissa
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/25310-2 - Evaluation of immune-metabolic blood cells in obese subjects: role of physical exercise and PPAR-gamma
• Grantee: Fábio Santos de Lira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/22105-3 - Physical fitness, technical actions and physiological responses during judo match
• Grantee: Ursula Ferreira Julio
• Support Opportunities: Scholarships in Brazil - Doctorate