weightloss withought injuring my knees and legs

[Darren2]

Hi im Darren and im19 years old at present my weight is 98kgs. recently i started going for a morning walk but i dont know if im hurting my legs and knees inorder to loose weigt when i walk or run my legs and knees hurt very badly i dontknow if the pain is from my leg front muscel or forn the leg bone