This is our weekly guest-blog post from the moms behind Red Tricycle, a site that focuses on the "lighter side" of parenting. Every week, they'll be bringing us their picks of stuff to do around the Bay Area with kids.

“I just had a baby” is a convenient excuse for the spare tire that forced you to move up three sizes. Round-the-clock hunger from nursing is another culprit keeping you from squeezing into your favorite pair of jeans. After a year or two goes by, though, it’s harder to blame the extra weight on the little guy – if anything, chasing him around the house is now part of your cardio routine. If you’re ready for a more serious work-out, excuses be gone! And, Dads who are prone to enjoying a calorie-rich beer while watching the game, you’re not off the hook -- this is for you, too. The following are just some of the many Bay Area gyms that offer child-care:

Click here to read about all the gyms with child-care!