The research team observed obese senior males and females 62 and older. The subjects were assigned a regimen of high-intensity exercise that occurred three times per week for six weeks. Each session included five one-minute bursts of exercise performed at 125 percent of VO2max. OXPHOS was measured in the subjects’ muscle and abdominal fat, along with their VO2max, body composition and several other metabolic measurements before and after the exercise regimens were performed.
While males increased their VO2max and OXPHOS in the muscle and reduced their body fat percentage by the end of the six weeks, no changes were seen in females. The researchers did note, however, that female OXPHOS capacity in abdominal fat was higher to begin with. They said that more analysis is needed to explain the gender differences in the results.
Steen Larsen, PhD, of the University of Copenhagen will present “High intensity training increases mitochondrial respiratory capacity in old males but not females” during a poster session on Thursday, Sept. 10, at 2:30 PM EDT in the Harbour Island Ballroom of the Westin Tampa Harbour Island.