This study compared physiological adaptations of 26 sedentary volunteers to six-week programs of jogging and rope skipping in order to test whether 10 minutes of rope skipping is equal to 30 minutes of jogging for improved cardiovascular efficiency. Results are discussed. (Author/MT)

Results are reported from a study that investigated the acid-base and lactate reponses to voluntary integration of breathing and exercise movements during beginning level form Ki Cho I, performed at competitive intensities. Findings suggest that respiratory compensation does not occur and that respiratory acidosis may contribute to metabolic…

A study of 10 children with insulin-dependent diabetes mellitus performing a maximum-effort cycling test indicated blood glucose levels did not change appreciably during test, while maximal oxygen uptake was substandard for their age groups. Findings suggest patients in fair to poor metabolic control can tolerate stress testing without…

In a roundtable format, five doctors explore the reasons why regular physical activity should continue to play a significant role in the rehabilitation of patients with coronary artery disease. Endurance exercise training improves aerobic capacity, reduces blood pressure, and decreases risk. (Author/MT)

Nine healthy women were tested before, during, and after exercise during the follicular and luteal phases of their menstrual cycles to determine the effect of menstruation on blood lactate levels. Findings are discussed. (Author/MT)

The physiologic and metabolic adjustments of the body to a single endurance exercise session are analyzed in terms of the respiratory system, the cardiovascular system, and oxygen delivery to the muscles. Patients with cardiorespiratory and neuromuscular diseases are compared to normal individuals. (Author/MT)

This review discussed the various mechanisms that have been proposed to be causative of the hyperventilation that occurs during heavy exercise. The humoral hypothesis and nonhumoral hypothesis and secondary factors are reviewed. (MT)

Investigation of 16 men's choices and uses of stride lengths during motorized treadmill running found that stride length variations combined with treadmill grade affected maximal oxygen uptake. (Author/CB)

Metabolic and cardiovascular responses during 45 minutes of continuous moderate intensity exercise were investigated in 11 children, 8-11 years of age. Results indicate that children exhibit metabolic and cardiovascular adjustments similar to those noted in adults during prolonged exercise. (Author/JMK)

A report is given on alterations in blood pressure, heart rate, left ventricular ejection time, and myocardial oxygen consumption during isometric contraction in a closed heated environment. (JD)

Reviews the literature on the left ventricular structural adaptations induced by resistance/strength exercise, focusing on human work, particularly well-trained strength athletes engaged in regular, moderate- to high-intensity resistance training (RT). The article discusses both genders and examines the use of anabolic-androgenic steroids in…

Tested the hypothesis that wall thickness, but not chamber dimension, would be larger in endurance- and power-trained athletes with spinal cord injuries than in sedentary people with spinal cord injuries. Data on 11 power-trained and 5 sedentary participants showed no statistically significant differences between groups, though there was a trend…

Monitoring of heart rates of 17 adult male tennis players during singles and doubles competition revealed that subjects playing singles games reached an average of 61 percent of their maximal heart rate, while, in doubles competition, they reached only 33 percent of maximal heart rate. (Author/CB)

Eight male and eight female runners were matched on the basis of performance in a 24.2 kilometer road race, and subjected to various performance and body measurements. The results indicated that the male and female runners were very similar in body composition and in metabolic and cardiorespiratory responses to exercise. (Author/MT)

This investigation examined day-to-day variations in metabolic measurements during submaximal running and cycling. Significant differences were found in the oxygen uptake (VO2) of runners and cyclists and the minute ventilation (VE) of cyclists while running, but blood lactic acid (HLA) did not differ day to day. (Author/MT)