Originally Posted by Allen Yeh
Great job on the weight loss!
What is your time frame? What is the distance? How much walking have you been doing? Times per week? Duration?
I know this is contradictory to what Steven said but I would NOT recommend sprinting yet until you lose more weight. You are very correct when worry about your knees/lower body.
What's the test at academy for aerobic fitness? Allan's right, sprints are a great recipe for injury until you get closer to your weight.
there's a ton of barbell or bodyweight complexes you can do in lieu of sprints for now.