Enthusiasm- or lack thereof

Have you ever heard of FLOW? as in "ya man, it just flowed" or "go with the flow"? Sometimes when things are right- it just flows. But what's going on when it doesn't? Why is it that we drag our feet and just aren't enthusiastic about our workouts?
Obviously there are more complicated reasons, and some very straightforward. However, motivation and enthusiasm are two things you have despite your physical status. A lot of how and why we accomplish things is determined by our belief in our own abilities to do it. If a person thinks something is too hard, and they maybe aren't strong enough- this makes them anxious and unhappy. By making an activity do-able or simply by *thinking* we can do it, we can just flow. By creating a positive enjoyable experience, this rewards our new habits.
Caution- Despite any amount of newly found enthusiasm, keep your workouts at an attainable and realistic level. I see people all the time who are SUPER enthusiastic and want to workout 7 days a week and lose their 50lbs in 1 month because they are just that movitated and hardworking. This isn't realistic and is setting them up for failure. By the end of the first two weeks the muscles haven't appropriately recovered and now overuse injuries are looming. This is why speaking to your doctor or fitness profressional is so essential to starting a new program. Rememebr when I said enthusiasm and motivation are seperate of your physical status? Your body is only able to adjust and adapt at certain levels. Whether it can do more or less then you're giving it is entirely dependent on your personal optimal level of stimulation. keep the motivation up, find inspiration and take it slow to keep it fun!