I've been exercising regularly for the last 2 months. For awhile my body was feeling great but the last few days, my hamstring has been bothering me again and I almost felt like my body took a step back. It is incredibly frustrating. But as I did yoga today I decided not to focus on the ultimate goal (which is to be way more fit that the average person). I am now simply going to enjoy actual act of exercise and enjoy that high you get right after. The actual getting fit part will come naturally... I assume.