Pain in the anterior part (tibia) of the leg that is provoked when you move the toes up is probably a muscle pain that originates from the muscles that control dorsal flexion of the toes. Muscle pain can be due to inflammation, overwork, or injury (muscle extension). You can try relieving the pain with massages and local analgesics (ketoprofen, ibuprofen, diclofenak…). You may also visit your GP for an examination of the affected area.