So I started riding again on August 5, after 3.5 years off due to lower back problems (and fear of relapse). I'm actually riding my mountain bike on the street for now to help build up stamina and strength so I won't die of exhaustion on the first dirt track when I hit the hills. I'd rather have a street bike at this point but that'll be a while.
I'm 46, 6'2", 200#, not really over-weight but not fit either. I'm now riding an average of 15 miles per day every other day - usually 2 days on 1 day off - with an avg speed of 14mph on hilly streets. Doesn't sound like much, but it's all I've been able to do so far and still be able to walk at the end. Yesterday (10/27) was the first time I've actually ridden 3 days in a row, after which my legs felt almost as sore and fatigued as they used to after two straight days, so I'm making a little progress. Tomorrow I'll start another set of three.
By 10/31 I'll have ridden only 600 miles in 3 months. I know I can only go so far and so fast with a MTB dragging me down on the street, but I really feel like I should be doing better.
So my question is, is my progress really as slow as I think it is? And what can I do to improve it either riding-style-wise or nutritionally, or both?
Any advice would be very gratefully received!