Journal
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
Volume 37, Issue 14, Pages 1110-1116Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0042-114702
Keywords
circulatory model; cycle ergometry; treadmill ergometry; heart rate kinetics; oxygen uptake kinetics
Categories
Funding
- DLR (Deutsches Zentrum fur Luft- und Raumfahrt), Germany [FKZ 50WB1426]
- Olympic-Training-Center Rheinland, Cologne, Germany
Ask authors/readers for more resources
his study aims to compare cardiorespiratory kinetics as a response to a standardised work rate protocol with pseudo-random binary sequences between cycling and walking in young healthy subjects. Muscular and pulmonary oxygen uptake ((V) over dotO(2)) kinetics as well as heart rate kinetics were expected to be similar for walking and cycling. Cardiac data and (V) over dotO(2) of 23 healthy young subjects were measured in response to pseudo-random binary sequences. Kinetics were assessed applying time series analysis. Higher maxima of cross-correlation functions between work rate and the respective parameter indicate faster kinetics responses. Muscular (V) over dotO(2) kinetics were estimated from heart rate and pulmonary (V) over dotO(2) using a circulatory model. Muscular (walking vs. cycling [ mean +/- SD in arbitrary units]: 0.40 +/- 0.08 vs. 0.41 +/- 0.08) and pulmonary (V) over dotO(2) kinetics (0.35 +/- 0.06 vs. 0.35 +/- 0.06) were not different, although the time courses of the cross-correlation functions of pulmonary (V) over dotO(2) showed unexpected biphasic responses. Heart rate kinetics (0.50 +/- 0.14 vs. 0.40 +/- 0.14; P = 0.017) was faster for walking. Regarding the biphasic cross-correlation functions of pulmonary (V) over dotO(2) during walking, the assessment of muscular (V) over dotO(2) kinetics via pseudo-random binary sequences requires a circulatory model to account for cardio-dynamic distortions. Faster heart rate kinetics for walking should be considered by comparing results from cycle and treadmill ergometry.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available