Slowing Down to Speed Up

I changed my training regiment in mid-October. I slowed down my longer runs in order to avoid injury, but increased my speed work to up my speed. It hasn’t worked. In three months I’ve injured myself more times than I have in the previous three years. I’m not sure what I’ll do but I’m nursing another hamstring injury and can’t start to train in earnest for the Boston Marathon. Late October I ran 8 miles at 6:30/mile pace. Figured that would put me sub-three hours in a marathon pretty easy if by late February I could run 16 miles at at 6:30 pace. That ain’t happening. Not sure what to do but I’m going to have to change something. Those races are expensive and to waste the money by hurting myself—something I seem to have a penchant to do—is unwise.