Open AccessFitting a Single-Phase Model to the Post-Exercise Changes in Heart Rate and Oxygen Uptake
Author(s) -
Romuald Stupnicki,
Teresa Gabryś,
Urszula Szmatlan-Gabryś,
Paweł Tomaszewski
Publication year - 2010
Publication title -
physiological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.647
H-Index - 70
eISSN - 1802-9973
pISSN - 0862-8408
DOI - 10.33549/physiolres.931708
Subject(s) - heart rate , cycle ergometer , mathematics , vo2 max , oxygen , logarithm , physical therapy , statistics , cardiology , chemistry , medicine , mathematical analysis , blood pressure , organic chemistry
The kinetics of post-exercise heart rate (HR) and oxygenconsumption (EPOC) was studied in 10 elite cyclists subjected tofour laboratory cycle ergometer maximal exercises lasting 30, 90,180 or 360 s. Heart rate and oxygen uptake (VO2) were recordedover a period of 6 min after the exercise. By applying the logittransformation to the recorded variables and relating them to thedecimal logarithm of the recovery time, uniform single-phasecourses of changes were shown for both variables in all subjectsand exercises. This enabled computing half-recovery times (t½)for both variables. Half-time for VO2 negatively correlated withsquare root of exercise duration (within-subject r=–0.629,p<0.001), the total post-exercise oxygen uptake till t½ was thusconstant irrespectively of exercise intensity. The method is simpleand enables reliable comparisons of various modes of exercisewith respect to the rate of recovery.