Plasma volume, osmolarity, total protein and electrolytes during treadmill running and cycle ergometer exercise

1992 ◽  
Vol 65 (4) ◽  
pp. 302-310 ◽  
Author(s):  
C. J. Gore ◽  
G. C. Scroop ◽  
J. D. Marker ◽  
P. G. Catcheside
Keyword(s):  
Plasma Volume ◽  
Total Protein ◽  
Cycle Ergometer ◽  
Treadmill Running ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise

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.

scholarly journals COMPARISON OF THE ACCUSPORT, YSI 1500, AND YSI 23L LACTATE ANALYZERS DURING PROGRESSIVE CYCLE ERGOMETER EXERCISE

1998 ◽  
Vol 30 (Supplement) ◽  
pp. 34
Author(s):  
D. S. Miles ◽  
M. H. Cox ◽  
T. J. Verde ◽  
M. I. Evangelisti ◽  
C. D. Moser ◽  
...  
Keyword(s):  
Cycle Ergometer ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise

Effects of pregnancy and chronic exercise on maternal cardiac structure and function

1999 ◽  
Vol 77 (11) ◽  
pp. 909-917 ◽  
Author(s):  
L A Wolfe ◽  
R J Preston ◽  
G W Burggraf ◽  
M J McGrath
Keyword(s):  
Heart Rate ◽  
Resting State ◽  
Cycle Ergometer ◽  
Structure And Function ◽  
Cardiac Structure ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Aerobic Conditioning ◽  
Cardiac Structure And Function ◽  
And Function

This study examined the interactive effects of pregnancy and aerobic conditioning on maternal cardiac structure and function. Effects of closely monitored cycle ergometer conditioning were studied during the second (TM2) and third trimesters (TM3) in 22 previously sedentary pregnant women (exercised group, EG) and a nonexercising pregnant control group with similar characteristics (CG, n = 19). Subjects were studied in the resting state by two-dimensional echocardiography and during cycle ergometer exercise at three steady-state power outputs at the start of TM2 (ENTRY), at the end of TM2 and TM3 (postconditioning), and 3-4 months postpartum (NPR, nonpregnant reference, CG only). Aerobic conditioning did not increase left ventricular dimensions beyond those attributable to pregnancy itself. In addition, in contrast with previous studies of nonpregnant women, physical conditioning during pregnancy did not reduce heart rate (HR) in the resting state. During exercise, the slope of the HR versus oxygen uptake (Vo2) regression decreased significantly between preconditioning and the end of TM3 in the EG, suggesting that training-induced reductions in HR become more evident with increasing exercise intensity. Also, significant reductions in oxygen pulse (Vo2/HR) were observed at all three work rates in the CG, but not in the EG. These findings support the hypothesis that the cardiovascular effects of aerobic conditioning are obscured by more powerful effects of pregnancy in the resting state but become "unmasked" during strenuous exercise.Key words: human gestation, cycle ergometer exercise, echocardiography, heart rate, stroke volume.

Analysis on Ventilatory Threshold and Muscle Fatigue in an Adolescent with Blindness during Cycle Ergometer Exercise

2009 ◽  
Vol 38 ◽  
pp. 709-718
Author(s):  
Dong Yup Han ◽  
Tae Beom Seo ◽  
Dong Hee Lee ◽  
Kwang Sub Byun ◽  
Il Gue Jeong ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Ventilatory Threshold ◽  
Cycle Ergometer ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise
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