Figure 4.

Best-fit linear lines are shown for aerobic capacities of two cross-sectional groups (aerobic trained and sedentary) as a function of their increasing chronological age. At the chronological age of 80 yrs, a horizontal line is extended from the endurance trained line to the left where it intersects the sedentary line at age 50 yrs. Subjects were women who had been aerobically trained for at least 2 yrs with road-racing competition (closed circles) vs. women who were sedentary (open squares) who performed no regular exercise and had BMI's <35 kg/m² (aerobic-trained women were matched across the entire age range for age-adjusted world-best 10-km running times to ensure homogeneity relative competitiveness). [Reproduced with permission from (503)].