Predicting recovery oxygen consumption after cycle exercise

2011 ◽  
pp. 5-12
Author(s):  
Florent Botton ◽  
Christophe Hautier ◽  
Jean-Paul Eclache
Keyword(s):  
Oxygen Consumption ◽  
Cycle Exercise ◽  
Recovery Oxygen Consumption

Predicting recovery oxygen consumption after cycle exercise

2012 ◽  
Vol n° 77 (3) ◽  
pp. 5
Author(s):  
Florent Botton ◽  
Christophe Hautier ◽  
Jean-Paul Eclache
Keyword(s):  
Oxygen Consumption ◽  
Cycle Exercise ◽  
Recovery Oxygen Consumption

Excess Post-Exercise Oxygen Consumption Following Continuous and Interval Cycling Exercise

2005 ◽  
Vol 15 (1) ◽  
pp. 28-37 ◽  
Author(s):  
William McGarvey ◽  
Richard Jones ◽  
Stewart Petersen
Keyword(s):  
Oxygen Consumption ◽  
Respiratory Exchange Ratio ◽  
Physiological Responses ◽  
Random Order ◽  
Cycle Exercise ◽  
Post Exercise ◽  
Graded Exercise Test ◽  
Continuous Cycling ◽  
Graded Exercise ◽  
Interval Cycling

The purpose of this investigation was to examine the effect of interval (INT) and continuous (CON) cycle exercise on excess post-exercise oxygen consumption (EPOC). Twelve males first completed a graded exercise test for VO2max and then the two exercise challenges in random order on separate days approximately 1 wk apart. The INT challenge consisted of seven 2 min work intervals at 90% VO2max, each followed by 3 min of relief at 30% VO2max. The CON exercise consisted of 30 to 32 min of continuous cycling at 65% VO2max. Gas exchange and heart rate (HR) were measured for 30 min before, during, and for 2 h post-exercise. Three methods were used to analyze post-exercise oxygen consumption and all produced similar results. There were no significant differences in either the magnitude or duration of EPOC between the CON and INT protocols. HR, however, was higher (P < 0.05) while respiratory exchange ratio (RER) was lower (P < 0.05) following INT. These results indicate that when total work was similar, the magnitude and duration of EPOC were similar following CON or INT exercise. The differences in HR and RER during recovery suggest differential physiological responses to the exercise challenges.

Exercise-induced lymphocyte apoptosis attributable to cycle ergometer exercise in endurance-trained individuals

2009 ◽  
Vol 34 (4) ◽  
pp. 603-608 ◽  
Author(s):  
James Wilfred Navalta ◽  
Brian Keith McFarlin ◽  
Thomas Scott Lyons ◽  
John Clifton Faircloth ◽  
Nicholas T. Bacon ◽  
...  
Keyword(s):  
Cell Death ◽  
Oxygen Consumption ◽  
Human Lymphocytes ◽  
Cycle Ergometer ◽  
Treadmill Running ◽  
Peak Oxygen Consumption ◽  
Lymphocyte Apoptosis ◽  
Cycle Exercise ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise

Exercise as a stimulus to induce lymphocyte apoptosis remains controversial. Differences may be due to participant fitness level or the methodology of assessing cell death. Another important issue is the mode of exercise used to induce physiological changes. Treadmill exercise typically induces significant apoptosis in human lymphocytes; however, the effect of cycle exercise is less clear. The 2 main purposes of this study were to assess if cycle ergometer exercise induces similar changes in apoptosis, and to further characterize the morphological method of assessing cell death. Endurance athletes (n = 10; peak oxygen consumption = 55.1 mL·kg–1·min–1) completed a 60-min ride on a cycle ergometer at ~80% peak oxygen consumption. Blood samples taken before (PRE) and after (POST) exercise were used to make blood films for apoptotic analysis via the morphological technique. A significant increase was observed in the apoptotic index following cycle exercise (PRE = 7.3 ± 2%, POST = 12.9 ± 2%; p < 0.01). On average, it took 42 ± 9 min to read PRE sample slides, which was significantly longer than the 27 ± 4 min needed for POST slides (p < 0.01). To our knowledge, this study is the first to report that exercise on the cycle ergometer produces changes in lymphocyte apoptosis. The values measured during this study were about 20% lower than those we have observed following treadmill running, which may be explained by differences in active muscle mass and the resultant physiological stress between the 2 exercise modes. It is likely that cycling may result in reduced immunosuppression, compared with running at the same intensity.

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