Sore A** shins!

[worknprogress]

Okay, so i usually include a fast walk on a 12% incline into my cardio sessions,
but every time, the front of my shins burn like helllll! Im not sure why, it does it on incline, or flat. I can take it for max 20min, then im about to scream, does anyone know why? Or have the same probem? Maybe im just a woosie!

[KALIMAN91]

Its more then likely your shoes if you have been walking for a while and you arent "new" to cardio.Then the first thing i would do is buy new shoes.
I can tell when i need new shoes every time because i start getting them bad when walking on a treadmill.