Please state the type of business you are talking about. If it’s an in-home training then you really don’t need much equipment and very little capital to invest. If you are talking about a studio or a small gym, them it all depends on the size of the location, the available capital, the type of training you will be providing (Cross fit, curves, Pilates, yoga, dance, etc.) and what kind of business plan you have in mind.
If you could provide some more information about what type of startup business you have in mind then we can help you more with your question