The aim of this study was to evaluate the effects of severe acute hypoxia on exercise performance and metabolism during 30-s Wingate tests. Five endurance- (E) and five sprint- (S) trained track cyclists from the Spanish National Team performed 30-s Wingate tests in normoxia and hypoxia (inspired O(2) fraction = 0.10). Oxygen deficit was estimated from submaximal cycling economy tests by use of...

The objective of the present study was to compare the effect of acute exercise performed at different intensities in relation to the anaerobic threshold (AT) on abilities requiring control of executive functions or alertness in physically active elderly females. Forty-eight physically active elderly females (63.8 +/- 4.6 years old) were assigned to one of four groups by drawing lots: control gr...

OBJECTIVES In addition to having health-promoting effects, exercise is considered to induce oxidative stress. To clarify whether increased oxygen consumption during exercise induces oxidative stress, we investigated the effects of aerobic exercise and anaerobic exercise on a series of oxidative damage markers. METHODS One group of subjects performed aerobic exercise and another group performe...

There are 3 distinct yet closely integrated processes that operate together to satisfy the energy requirements of muscle. The anaerobic energy system is divided into alactic and lactic components, referring to the processes involved in the splitting of the stored phosphagens, ATP and phosphocreatine (PCr), and the nonaerobic breakdown of carbohydrate to lactic acid through glycolysis. The aerob...

OBJECTIVE To compare the aerobic and anaerobic exercise capacity of children with juvenile idiopathic arthritis (JIA) with healthy controls, to determine if there were differences based on disease onset type, and to examine the relationship between aerobic and anaerobic exercise capacity in children with JIA. METHODS Sixty-two patients with JIA (mean +/- SD age 11.9 +/- 2.2 years, range 6.7-1...

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...

The degree of exercise-induced cardiac dysfunction and its relation to the anaerobic threshold were evaluated in 23 patients with chronic heart disease. A symptom-limited exercise test was performed with a cycle ergometer with work rate increased by 1 W every 6 seconds. Left ventricular function, as reflected by ejection fraction, was continuously monitored with a computerized cadmium telluride...

cardiac function during exercise is assumed to be important in determining exercise tolerance. the aim of this study was to evaluate hemodynamic changes of blood flow at anaerobic threshold and its effect on exercise tolerance. 24 patients with coronary artery disease were voluntarily divided into two groups of experimental (n=12) and control (n=12). the experimental group participated in 8 wee...

A popular concept in the exercise sciences holds that fatigue develops during exercise of moderate to high intensity, when the capacity of the cardiorespiratory system to provide oxygen to the exercising muscles falls behind their demand inducing "anaerobic" metabolism. But this cardiovascular/anaerobic model is unsatisfactory because (i) a more rigorous analysis indicates that the first organ ...