This study was aimed to compare the maximal fat oxidation exercise intensity(MFOEI) by gender and compare heart rate(HR), respiratory exchange ratio(RER), total kilocarolies per minute(Tkcal), and fat kilocarolies per minute(Fkcal) in this exercise in...
This study was aimed to compare the maximal fat oxidation exercise intensity(MFOEI) by gender and compare heart rate(HR), respiratory exchange ratio(RER), total kilocarolies per minute(Tkcal), and fat kilocarolies per minute(Fkcal) in this exercise intensity. Forty four healthy young volunteers(26 men, 18 women) served as subjects after signing an informed consent form. Following an overnight fast, each subject completed stretching and tree minute warm-up at 3.0mph of speed and 10% of grade, followed by a maximal Bruce protocol treadmill test. Expired gases were collected and analyzed each one minute using Quinton metabolic cart. The MFOEI was refined as the intensity which resulted in maximal Fkca1 as determined by converting VO₂ to Fkcal at each treadmill stage using RER and a Lusk table. MFOEI as expressed %VO₂max(L/min) was significantly higher women with compared men, 46.5 and 51.8%VO₂max, respectively(P<05). However, there were no difference in %VO₂max(㎎/㎏/min), %HRmax, %RHR and %VT between genders. Except for HR, the resultant of t-test for VO₂, RER, Tkcal, and Fkcal were significantly higher men. However, the percentage of fat oxidation at MFOEI was higher in women(men about 74%, women about 90%). This results may be supported the theory that female gonadotrophic hormones, specifically estradiol, greatly influence substrate utilization patterns, Thus, MFOEI which prescribe exercise intensity to weight control and loss is likely to be distinguish from genders.