Your welcome.I am so glad you replied. I was going to incorporate the walking lunges into my track routine. When do you think I should add them: at the end of everything or maybe a set of 40 after my 5th,6th and 7th lap? Right now I walk 2 laps, bleachers 10 times up and then walk 5 more laps w/ the last one being the cooldown.
P.S. I notice that if I put the bleachers kind of in the middle of my walking that my heart rate really stays up there.