See Mommy run. Run, Mommy, run.

... aerobics and strength-building moves, or Stroller Barre , which borrows sculpting techniques from ballet and Pilates. Both offerings are available through Fit4Mom , which was known as Stroller Strides until this summer. The 12-year-old program, ...

http://www.washingtonpost.com/lifestyle/wellness/fitness-programs-cater-to-mothers-and-their-young-kids/2013/10/01/ab986cbc-26dc-11e3-ad0d-b7c8d2a594b9_story.html