You know the old expression "Too much of a good thing"? Unfortunately it also applies to health and fitness. I've heard it countless times over the years. "I love the way working out makes me feel. I want to do it every day". There's also "I just need to workout every day. My day just isn't complete without it". And of course we have "It's been months since I ate any junk food. I love the way healthy eating makes me feel. I don't ever want it again". At first glance, someone might ask "What's the problem?". Let's look at these…