I like #47. Give a good feeling. A couple things. #48, seems like the graphic is used a whole bunch on other sites. I would rather powerful Sans Serif fonts, because otherwise I think the words look too religiously. #42 is a good concept. Has #47 been used before? For some reason it look familiar to me.
The logos you have would look great on a t-shirt. However, have you tried superimposing it onto the attached graphics that show the website. I think having an emblem above the words Workout Mission might look a little weird if the logo is left justified on the site.
Overall, I can see you're great designer.