Influence of repeated sprint training on pulmonary O2 uptake and muscle deoxygenation kinetics in humans

• Published in: Journal of applied physiology (1985) Vol. 106; no. 6; pp. 1875 - 1887
• Main Authors: Bailey, Stephen J, Wilkerson, Daryl P, DiMenna, Fred J, Jones, Andrew M
• Format: Journal Article
• Language: English
• Published: Bethesda, MD Am Physiological Soc 01.06.2009; American Physiological Society
• Subjects: Adaptation, Physiological - physiology; Bicycling - physiology; Biological and medical sciences; Exercise - physiology; Exercise Test; Female; Fundamental and applied biological sciences. Psychology; Hemoglobins - analysis; Hemoglobins - metabolism; Humans; Lung - metabolism; Male; Muscle, Skeletal - metabolism; Oxygen - metabolism; Oxygen Consumption - physiology; Spectroscopy, Near-Infrared; Young Adult; Physical exercise; Human; near-infrared spectroscopy; Physical training; Physical performance; Lung; Oxygen consumption; Striated muscle; Respiratory system; Running locomotion; Sport; Vertebrata; Mammalia; exercise performance; Kinetics; oxygen uptake kinetics
• ISSN: 8750-7587; 1522-1601
• DOI: 10.1152/japplphysiol.00144.2009

School of Sport and Health Sciences, University of Exeter, Exeter, Devon, United Kingdom Submitted 10 February 2009 ; accepted in final form 31 March 2009 We hypothesized that a short-term training program involving repeated all-out sprint training (RST) would be more effective than work-matched, low-intensity endurance training (ET) in enhancing the kinetics of oxygen uptake ( O 2 ) and muscle deoxygenation {deoxyhemoglobin concentration ([HHb])} following the onset of exercise. Twenty-four recreationally active subjects (15 men, mean ± SD: age 21 ± 4 yr, height 173 ± 9 cm, body mass 71 ± 11 kg) were allocated to one of three groups: RST, which completed six sessions of four to seven 30-s RSTs; ET, which completed six sessions of work-matched, moderate-intensity cycling; and a control group (CON). All subjects completed moderate-intensity and severe-intensity "step" exercise transitions before (Pre) and after the 2-wk intervention period (Post). Following RST, [HHb] kinetics were speeded, and the amplitude of the [HHb] response was increased during both moderate and severe exercise ( P < 0.05); the phase II O 2 kinetics were accelerated for both moderate (Pre: 28 ± 8, Post: 21 ± 8 s; P < 0.01) and severe (Pre: 29 ± 5, Post: 23 ± 5 s; P < 0.05) exercise; the amplitude of the O 2 slow component was reduced (Pre: 0.52 ± 0.19, Post: 0.40 ± 0.17 l/min; P < 0.01); and exercise tolerance during severe exercise was improved by 53% (Pre: 700 ± 234, Post: 1,074 ± 431 s; P < 0.01). None of these parameters was significantly altered in the ET and CON groups. Six sessions of RST, but not ET, resulted in changes in [HHb] kinetics consistent with enhanced fractional muscle O 2 extraction, faster O 2 kinetics, and an increased tolerance to high-intensity exercise. oxygen uptake kinetics; exercise performance; near-infrared spectroscopy Address for reprint requests and other correspondence: A. M. Jones, School of Sport and Health Sciences, St. Luke's Campus, Univ. of Exeter, Heavitree Road, Exeter, Devon, EX1 2LU, UK (e-mail: a.m.jones{at}exeter.ac.uk )