For today’s edition of Dear Mark, we’ve got a two-parter. First up is a discussion of the latest (and only) exercise and gut flora study. It’s been making the rounds and even I gave it a brief mention in yesterday’s Link Love, but today I dig a little deeper. Find out what we can take away from it and apply to our own lives. Then, I cover a series of several questions regarding pregnancy, calories, weight gain, and exercise from a newly pregnant mother-to-be. Even though I’m a man, I offer my perspective and insight.