European journal of applied physiology
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Eur. J. Appl. Physiol. · Mar 2008
Randomized Controlled Trial Comparative StudyChanges in physical fitness in moderately fit adults with and without the use of exercise telemetry monitors.
One of the goals of exercise prescription is the use of easily understandable physical activities to improve physical fitness. Lack of study designs investigating self-administered programs utilizing exercise telemetry monitors (ETM) compared to a no exercise telemetry monitors (NETM) guided exercise programs exist. The aim of the study was to determine whether the ETM programs improve physical fitness more than NETM programs and to measure differences between males and females. ⋯ Males did not differ in total exercise sessions; however, ETM-men completed significantly more light sessions (P
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Eur. J. Appl. Physiol. · Mar 2008
Randomized Controlled Trial Comparative StudyComparison of cardiac output determined by different rebreathing methods at rest and at peak exercise.
Several rebreathing methods are available for cardiac output (Q (T)) measurement. The aims of this study were threefold: first, to compare values for resting Q (T) produced by the equilibrium-CO(2), exponential-CO(2) and inert gas-N(2)O rebreathing methods and, second, to evaluate the reproducibility of these three methods at rest. The third aim was to assess the agreement between estimates of peak exercise Q (T) derived from the exponential and inert gas rebreathing methods. ⋯ The limits of agreement were -0.49 to 0.79 l min(-1). Due to the ability to evaluate the degree of gas mixing and to estimate intra-pulmonary shunt, we believe that the inert gas rebreathing method has the potential to measure Q (T) more precisely than either of the CO(2) rebreathing methods used in this study. At peak exercise, the exponential and inert gas rebreathing methods both showed acceptable limits of agreement.