Energy: Waking up by doing a sequence of yoga or going for a short run is a great way to wake me up and keep me energized in early morning classes and meetings. The benefits of waking up early to do 15-30 minutes of yoga is worth it.
Flexibility: This seems weird, but I do a lot of sitting and walking during the day. I find that I'm more able to move without being sore as well as stiff.
Attitude: I tend to be less cranky when I wake up with exercise. I also feel more able to work out later in the day because I've already experienced the benefits of working out!
Schedule: Since I'm so busy, I try and schedule all of my workouts and treat it as an appointment.
Accomplishment: Starting the day off with something productive makes me feel like I started off on the right foot, and sets the tone for the rest of my day!
When do you workout? Have you tried to wake up and work out?