As a mom myself, staying healthy and fit requires some extra effort on my end. Keeping active has become a challenge especially now that I have a tot running around, but the key for me is to keep moving - literal steps if possible - throughout the day, and staying hydrated as mentioned above! Also, keeping a balanced diet helps boost my energy levels so I'm not dragging myself around like a zombie mum.
I try to take short walks when pushing the stroller, or do some squats and stretches while holding onto the stroller too; anything to keep me active and the weight off! And it's much easier now that my kids are a bit older and require less supervision during their outdoor playtime - I get some exercise by joining in their games!