Hello. I'm around 5 ft. 11 in,, and (I haven't weighed myself in a while) probably around 140 lbs. I've been jogging around 3 miles a day for a couple of weeks. What should I shoot for? Is this a good amount? I kind of went too far a couple of days ago and ran about 8 miles in a day, so I took yesterday off. My goal is to strengthen my legs and stamina, but also to keep doing this until it feels like nothing to jog 3 or 4 miles. I'm sure a lot of you jog every day and can give me some good advice.