Table 3.

Change over 6 months in insulin, IGF-I, and IGFBP-3 stratified by adherence and change in pedometer steps, exercisers only [mean (SE)]

ΔInsulin (μU/mL)PΔIGF-I (ng/mL)PΔIGFBP-3 (μg/mL)P
Daily activity log over 6 mo*
    <120 min/wk, n = 16−0.31 (2.49)0.33−5.47 (8.24)0.91−0.16 (0.09)0.81
    ≥120 min/wk, n = 20−3.12 (2.13)−6.79 (7.37)−0.19 (0.08)
Change in pedometer steps
    <1 mile/d, n = 22−0.02 (1.98)0.20−4.29 (7.01)0.67−0.13 (0.07)0.38
    ≥1 mile/d, n = 14−4.09 (2.43)−9.20 (8.81)−0.24 (0.09)
  • NOTE: Data were adjusted for baseline level.

  • * Adherence was determined from daily activity logs kept for each week of the 6-month study. Women reported the type and duration of every moderate- to vigorous-intensity recreational activity performed daily with adherence defined as average minute per week.

  • Women wore pedometers for 7 consecutive days at baseline and 6 months. Average steps per day at baseline and 6 months, and the change in average steps per day between baseline and 6 months, were calculated. 1 mile = 1,760 steps.