Acute cardiac effects of marathon running.

We sought to clarify the significance of cardiac dysfunction and to assess its relationship with elevated biomarkers by using cardiovascular magnetic resonance imaging in healthy, middle-aged subjects immediately after they ran 26.2 miles. Cardiac dysfunction and elevated blood markers of myocardial injury have been reported after prolonged strenuous exercise.

Cardiorespiratory responses to maximal arm and leg exercise in national-class marathon runners.

Marathon runners (MR) are among the most aerobically fit athletes in the world. Although aerobic capacity (VO(2)max) during arm exercise generally varies between 64% and 80% of leg VO(2)max (mean 70%) in healthy men, few data are available regarding the comparative arm fitness of MR. To clarify the relationship between arm and leg fitness in MR, we studied 10 national-class MR (mean + or - standard deviation age 30 + or - 4 years) whose best marathon times averaged < 2 hours and 40 minutes.

Cardiorespiratory fitness and sedentary lifestyle in the morbidly obese.

Background: Sedentary lifestyles and poor physical fitness are major contributors to the current obesity and cardiovascular disease pandemic.

Hypothesis: Daily physical activity and cardiorespiratory fitness are correlated in morbidly obese individuals in their free-living environment.

Methods: Ten morbidly obese participants continuously wore an activity sensor that measured caloric expenditure, minute-by-minute physical activity, and steps/day over a 72-h period.

Cardiorespiratory fitness and obstructive sleep apnea syndrome in morbidly obese patients.

Background: Conflicting data exist regarding the effects of obstructive sleep apnea syndrome (OSAS) on cardiorespiratory fitness in morbidly obese individuals with normal resting left ventricular function.

Methods: Ninety-two morbidly obese subjects without any prior diagnosis of OSAS underwent cardiorespiratory fitness testing, two-dimensional echocardiography, and overnight polysomnography. Using the results of the polysomnogram, comparisons were made between subjects with (n = 42) and without (n = 50) OSAS.

Peak oxygen consumption and the minute ventilation/carbon dioxide production relation slope in morbidly obese men and women: influence of subject effort and body mass index.

The authors evaluated the minute ventilation/carbon dioxide production relation (VE/VCO2 slope) as a complementary measure to peak oxygen consumption (peak VO2) in 76 patients (mean +/- SD age = 44.3+/-10.8 years, 69.

Caloric expenditure in the morbidly obese using dual energy X-ray absorptiometry.

Total caloric expenditure is the sum of resting energy expenditure (REE) and caloric expenditure during physical activity. In this study, we examined total caloric expenditure in 25 morbidly obese patients (body mass index>or=35 kg/m(2)) using dual energy X-ray absorptiometry (DXA) scanning and cardiorespiratory exercise testing. Our results show average REE for all individuals was 2027+/-276 kcal/d and mean net caloric expenditure during 30 min of exercise was 115+/-16 kcals.

Cardiorespiratory fitness and short-term complications after bariatric surgery.

Background: Morbid obesity is associated with reduced functional capacity, multiple comorbidities, and higher overall mortality. The relationship between complications after bariatric surgery and preoperative cardiorespiratory fitness has not been previously studied.

Methods: We evaluated cardiorespiratory fitness in 109 patients with morbid obesity prior to laparoscopic Roux-en-Y gastric bypass surgery.

Hemostatic responses to resistance training in patients with coronary artery disease.

Purpose: This study was undertaken to evaluate changes in coagulation and fibrinolytic responses to an acute bout of resistance training in patients with coronary artery disease.

Methods: Fourteen low-to-moderate risk men (mean age, 57.6 +/- 9 years; body mass index, 26.

Comparative impact of morbid obesity vs heart failure on cardiorespiratory fitness.

Background: We are in the midst of an obesity pandemic. Morbid obesity is associated with dyspnea on exertion and higher overall mortality rates. The relations between measures of cardiorespiratory fitness in morbidly obese persons compared to those with heart failure are unknown.

Coagulation and fibrinolytic responses to manual versus automated snow removal.

Purpose: The purpose of this study was to assess coagulation and fibrinolytic responses to snow removal.

Methods: Thirteen healthy male subjects (age = 26 +/- 5 yr, height = 179.0 +/- 7.