The time-course and mechanisms of adaptation of cardiorespiratory fitness were examined in 8 older (O) (68 +/- 7 yr old) and 8 young (Y) (23 +/- 5 yr old) men pretraining and at 3, 6, 9, and 12 wk of training. Training was performed on a cycle ergometer three times per week for 45 min at approximately 70% of maximal oxygen uptake (Vo(2 max)). Vo(2 max) increased within 3 wk with further increas...

Recent investigations have demonstrated that at the onset of low-to-moderate-intensity leg cycling exercise (L) the carotid baroreflex (CBR) was classically reset in direct relation to the intensity of exercise. On the basis of these data, we proposed that the CBR would also be classically reset at the onset of moderate- to maximal-intensity L exercise. Therefore, CBR stimulus-response relation...

background: the correct appraisal of the employees' work ability is important for employers in the economic viewpoint. improving the personnel's work ability is a way to increase the productivity of human resources in industries and organizations. the purpose of this research was to evaluate the ability of employees by work ability index (wai) and physical work capacity (pwc) and to find a corr...

The purposes of the present study were to (a) modify previously published Vo(2)max equations using the constant error (CE = mean difference between actual and predicted Vo(2)max) values from Malek et al. (28); (b) cross-validate the modified equations to determine their accuracy for estimating Vo(2)max in aerobically trained men; (c) derive a new non- exercise-based equation for estimating Vo(2...

Adult and pediatric patients with ESRD have impaired maximum oxygen consumption (VO(2) max), a reflection of the cardiopulmonary system's ability to meet increased metabolic demands. We sought to determine factors associated with decreased VO(2) max in pediatric patients with different stages of CKD. VO(2) max was measured using a standardized exercise testing protocol in patients with stage 2 ...

BACKGROUND Field tests measuring the same construct, in this case, aerobic capacity, use different scales, which makes fitness assessment of children and youth potentially confusing. The Primary Field Test Centered Equating Method has been developed to set tests on the same scale, as illustrated by the conversion of Progressive Aerobic Capacity Endurance Run (PACER) scores to 1-mile run/walk ti...

Traditionally, maximum oxygen consumption (VO 2 max) has been used to represent the maximum aerobic capacity. Presently, VO 2 max is used as an indicator of cardiorespiratory  tness, running performance predictor, to evaluate training related adaptations in healthy individuals and in patients with coronary arterial disease, detraining, mortality predictor and to evaluate sleeping disorder. The...

Maximal O(2) consumption (Vo(2 max)) is lower in individuals with Type 2 diabetes than in sedentary nondiabetic individuals. This study aimed to determine whether the lower Vo(2 max) in diabetic patients was due to a reduction in maximal cardiac output (Q(max)) and/or peripheral O(2) extraction. After 11 Type 2 diabetic patients and 12 nondiabetic subjects, matched for age and body composition,...

BACKGROUND AND OBJECTIVES Maximum oxygen uptake (VO(2) max) is internationally accepted parameter to evaluate the cardiorespiratory fitness. But determination of VO(2)max is restricted within well equipped laboratory because of its exhausting, hazardous and complicated experimental protocol. Various attempts have been made to enumerate indirect and easy protocols for prediction of VO(2)max but ...

previous studies indicated that endurance exercise decreases levels of liver enzymes. the aim of this study was to determine the effect of endurance exercise on liver enzymes in eight weeks in iranian women who are stopping the drug with methadone. sixty iranian women prisoners including 30 cases as experimental group and 30 volunteers served as control. the mean age, height, weight, percent of...