In the exercising human, maximal oxygen uptake (VO2max) is limited by the ability of the cardiorespiratory system to deliver oxygen to the exercising muscles. This is shown by three major lines of evidence: 1) when oxygen delivery is altered (by blood doping, hypoxia, or beta-blockade), VO2max changes accordingly; 2) the increase in VO2max with training results primarily from an increase in max...

OBJECTIVE To study physiological changes caused by long term endurance training in a world class female distance runner, and to compare these changes with alterations in 3000 m running performance. METHODS The subject underwent regular physiological assessment during the period 1991-1995. Physiological measures made included body composition, maximal oxygen uptake (VO2MAX), running economy, a...

BACKGROUND A plateau in oxygen consumption (VO2) is the primary means of confirming that maximal oxygen uptake (VO2max) is attained during incremental exercise to fatigue. However, it is still unresolved what causes expression of a plateau in VO2 at the end of incremental exercise. OBJECTIVES To elucidate incidence and identify determinants of the VO2 plateau in subjects of varying fitness. ...

Debate on the mechanism(s) responsible for the scaling of metabolic rate with body size in mammals has focused on why the maximum metabolic rate ( _ VO2max) appears to scale more steeply with body size than the basal metabolic rate (BMR). Consequently, metabolic scope, defined as _ VO2max /BMR, systematically increases with body size. These observations have led some to suggest that _ VO2max an...

Maximal VO2 (VO2max) has mostly been the province of exercise physiologists wishing to provide a measure of athletic potential or to characterize subjects in exercise-related research. It is also used clinically to determine a patient's exercise capacity. More recently, it has been recognized that the study of VO2max can provide fundamental insight into O2 transport at all points between inspir...

UNLABELLED Although the characteristics of 15-a-side rugby union players have been well defined, there is little information on rugby sevens players. PURPOSE The authors profiled the anthropometric, physiological, and performance qualities of elite-level rugby sevens players and quantified relationships between these characteristics. METHODS Eighteen male international rugby sevens players ...

The aim of this study was to investigate the association between cardiorespiratory fitness and gut microbiota composition in premenopausal women. The participants consisted of 71 premenopausal Finnish women (aged 19-49 years). Gut microbiota were analyzed using flow cytometry, 16S rRNA gene hybridization and DNA-staining. Maximum oxygen uptake (VO2max) was assessed by respiratory gas analyzer a...

Background: Sport performance in football players is determined by Aerobic and Anaerobic power in them. Aerobic power is best indicated by VO2max. VO2max is maximum capacity of individual’s body to transport and utilize the oxygen during exercise, which reflects the physical fitness of individual. Anaerobic power is power produced in absence of oxygen. Anaerobic capacity is useful in sprints in...

Abstract This study compared the effects of using continuous and interval aerobic exercise during concurrent training on cardiorespiratory adaptations in women. Thirty-two participants were randomly assigned into one following groups: running resistance (C-RUN, n = 10), (I-RUN, 11), or control group that performed only (RT, 11). Each trained twice a week 11 weeks. Oxygen uptake corresponding to...

INTRODUCTION.................................................................................. 391 METHODS...................................................................................... 391 Ultracentrifugation ............................................. 391 Chromatography.............................................................................. 392 Electrophoresis ....................