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Bioelectrical impedance analysis (BIA) is a method for estimating body composition, in particular body fat and muscle mass, where a weak electric current flows through the body, and the voltage is measured in order to calculate impedance (resistance and reactance) of the body. Most body water is stored in muscle.
The two main fuel sources for aerobic exercise in the body include fat (in the form of adipose tissue) and glycogen. At lower intensity aerobic exercise, the body preferentially uses fat as its main fuel source for cellular respiration , however as intensity increases the body preferentially uses glycogen stored in the muscles and liver or ...
For men with a BMI of 25, about 20% have a body fat percentage below 20% and about 10% have body fat percentage above 30%. [47] Body composition for athletes is often better calculated using measures of body fat, as determined by such techniques as skinfold measurements or underwater weighing and the limitations of manual measurement have also ...
In males, mean percentage body fat ranged from 23% at age 16–19 years to 31% at age 60–79 years. In females, mean percentage body fat ranged from 32% at age 8–11 years to 42% at age 60–79 years. But it is important to recognise that women need at least 9% more body fat than men to live a normal healthy life. [2]
The BAI is calculated as: [2] Hip circumference (Pearson correlation coefficient, R = 0.602) and height (R = −0.524) are strongly correlated with percentage of body fat.. Comparing BAI with "gold standard" dual-energy X-ray absorptiometry (DXA) results, the correlation between DXA-derived percentage of adiposity and the BAI in a target population was R = 0.85, with a concordance of C_b = 0
A wide variety of body composition measurement methods exist. The gold standard measurement technique for the 4-compartment model consists of a weight measurement, body density measurement using hydrostatic weighing or air displacement plethysmography, total body water calculation using isotope dilution analysis, and mineral content measurement by dual-energy X-ray absorptiometry (DEXA). [1]
Professional athletes are featured prominently and are used to test the limits of the human body. In addition, host John Brenkus also participated in cases where an "average Joe" was required. The Lead Engineer throughout the Sport Science series has been Dr. Cynthia Bir, Professor of Biomedical Engineering at Wayne State University in Detroit ...
The National Aerobic Championships was a competition of aerobic gymnastics started in 1984 in the United States. Founded by Sports Fitness International, it was the first major championship in the sport predating the Aerobic Gymnastics World Championships by 11 years.