Im very new to all this. Just booked into the Chester half marathon in May. I am fairly active, do about 4 runs a week on average about 4 miles each. I go to the gym, do other various cardio activity. I only started really pushing myself at the new year though. Just a bit worried I might be jumping the gun a bit here. I'm determined to do this though, does anyone think I may be a bit pushed for time?Thanks!