its sunday and i want to get some studies done, but my back aches which is distracting me from my studies. i was wondering about going for a run. i did yesterday for 20 minutes, and i experienced no more backpains throughout the rest of the day. would it be bad for someone who is somewhat new(not entirely though, ran 3 times last week) to regular jogging to go jogging two days in a row? Can i somehow modify my technique so that it becomes more tolerable for my body to do so? does the underlay play an important role(dirt road vs asphalt)?