Definitely read through the Personal Trainer’s thread and the links there. In general, the best marketing will be the kickass results you deliver to clients. Have them make serious visible progress and word of mouth will spread.
Get on social media and pump out some good content mixed with testimonials. I’m a big, big believer in Gary Vaynerchuk’s Jab, Jab, Jab, Right Hook approach.
Also, there’s no posting links to training/nutrition sites or blogs here on the forums, but you can put a link to your site in your profile. I’m sure you’re still building it, but it’s a pretty ugly site right now. At the very least, get your own domain name. They’re super cheap, like under 10 bucks for a year, and make you look much more professional. Also, splurge for the upgrade and pay to not advertise Wix all over the place. It makes your business seems amateurish.