http://crghlabr45r5pqkgnbgehywk5nxutdks5iss7tabyux5psikqqjirryd.onion/fit/2.html
I'm absolutely not an expert but, if you're interested in joining and are an absolute beginner I would wholeheartedly recommend the C25K program (pic related #2), I tried it and while progress is slow, it's very easy to follow and you see the first results near immediately, even if you've never done jackshit in your life.