Excess bodyweight and obesity are one of the most common problems facing adult men and women of modern industrialised societies. Obesity is associated with alternations in glucose tolerance and lipoprotein profiles, which produces an increased risk for coronary heart disease. Starvation and low-calorie diets under 500 kcal/day reduce bodyweight and fat, but serious life-threatening problems can develop. For these reasons, moderate caloric restrictions between 1000 and 1500 kcal/day have been shown to produce the most successful long term weight loss. Exercise conditioning without caloric restrictions has been shown to reduce bodyweight, primarily fat weight, and increase lean bodyweight. However, this occurs only when the energy expenditure is greatly elevated and the exercise sessions are long in duration. Well controlled multiple-group studies indicate that exercise combined with caloric restriction is the best method for bodyweight and fat reduction. Including exercise in the diet regimen increases cardiorespiratory functional capacity, decreases cholesterol and triglyceride levels, and helps to retard the loss of lean muscle mass. The diet and exercise prescription which produces the best and safest results includes a diet of approximately 1200 kcal/day and a physical activity programme of at least 3 days/week, 20 to 30 minutes in duration, and at a minimum intensity of 60% of maximum heart rate.
The effects of oral administration of potassium and magnesium aspartate (K + Mg Asp) on physiologic responses to 90 min of treadmill walking at approximately 62% VO2 max were evaluated in seven healthy males (VO2 max = 59.5 ml X kg-1 X min-1). A total of 7.2 g of K + Mg Asp were administered to each subject during a 24 h period prior to work and compared to control and placebo trials. For control, placebo, and K + Mg Asp trials, no significant differences were observed in resting or exercise values for ventilation (VE), oxygen uptake (VO2), carbon dioxide production (VCO2), respiratory exchange ratio (RO), heart rate (HR), or blood pressure (BP). In addition, there were no differences between the three trials for exercise-induced decreases in body weight and increases in rectal temperature, or for pre- and post-exercise alterations in serum lactic acid, creatine kinase, lactic dehydrogenase, and percentage change in plasma volume. The findings from this study indicate that oral ingestion of K+ Mg Asp prior to exercise had no effect on cardiorespiratory, hematologic, and metabolic responses to 90 min of work conducted at approximately 62% VO2 max.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.