Pregnant Together Work Out Together? Evaluating Population Characteristics Associated With Adherence To Group Prenatal Exercise

Abstract

METHODS:One hundred twenty-nine female F 2 mice derived from high physically active (SWR/J) and low physically active (DBA/2J) F 0 progenitors were individually housed in cages with running wheels and magnetic sensors. Daily duration (min/d), daily distance (km/d) and weekly BW measurements (g) were recorded from nine weeks of age until the end of life. Average daily speed (m/min) was calculated. RESULTS:Body weight increased with age (p<0.0001). Daily duration increased from age 20 to 44 weeks and decreased thereafter to 88 weeks of age (p<0.0001), while average daily running speed declined with age (p<0.0001). Across the lifespan, we found a significant correlation between BW and duration (p<0.0001, r=-0.117, r 2 =0.014) and between BW and speed (p=0.005, r=-0.060, r 2 =0.004), with week-specific correlations for these variables both early and late in the lifespan. CONCLUSIONS:The significant correlations of speed and duration to BW early and late in the lifespan suggests differing influence of activity on BW depending upon the age of the mouse.