Nairobi, June 20 -- Mercy Gachanja insists she's still a little girl at heart. And honestly, who's going to argue with her? At 48, she wears that youthful spirit so naturally.

"I have always been an active person, even as a child. But after my fourth baby, I struggled to snap back into shape. For the first time, I felt insecure about how I looked," she says.

She was deep into entrepreneurship, 'very workaholic', she says, running a business in Nairobi, and for the first time, she couldn't recognise her body.

With her previous pregnancies, bouncing back had come naturally.

"I had assumed that it would be no different with my fourth child. But my body refused to cooperate. I didn't like what I saw around my waist. Yes, people tell you i...