Will spinning help to shape my legs?

[JohnSnowsTie]

SIL has inspired me to get fit because she has the most gorgeous calves I've ever seen, and all because she's recently got into cycling.

I haven't got time to dedicate to the amount of cycling she does (I'll have 3 DCs under 4 by year end!) but I wondered if spinning 2/3 times a week might give definition to my legs? I'm hoping to combine it with C25K.