Posted: 25/09/2013 at 19:27
I am a newbie like you, I started running at the end of June so 3 Months, before that other than walking to the station etc I did no real exersise. I used to weigh nearly 18 Stone and I am 5'9, I lost 3 stone through diet a few years ago and kept most of it off. When I started running I was 15 Stone. I am now just over 14 and am now running up to 11K 4 times a week and aim to do 12K on Monday.
BMI wise we are pretty much the same and I am 3 years younger than you so there is not much in it between us, so I would not worry about being too big, just do what you feel is right. Any aches or pains and back off, visit the doctors is required, but keep going.
I have a 10K booked for the beginning of December and am hoping to hit the hour mark.