Born in Germany, Grunwald is a natural athlete, but is not that fond of dedicating her life to the gymnasium.
"I don't like limiting myself to one sporting discipline and that includes the gym. But for the past six months I've been doing a bit more with this aim in mind.
"I always said if I get up on stage I'd refuse to compromise my normal diet to compete. I'd rather run or swim more, than eat silly foods ... I'm not cramming in any silly stuff."
Grunwald said the cost of competing in body building surprised her and she would welcome any potential sponsor.
"The costs are surprisingly high for the sticky tanning stuff, the bikinis, the entry fees and travel costs, so if there's anyone out there who wants to sponsor a mum of four they're welcome to get in touch," she said.