"I suspect that chronic soreness and injuries to my hamstrings and glutes have shortened my stride. (My cadence seems OK at 175-180 in training, and >180 at faster paces.)
Would you (and others) say my problem is speed or more strength/stamina?"
If anyone were to nail down my problems, that says it all. The chronic problems I have had for the last 3 years in the glute/hams have certainly affected my stride, and I am only now seeing a glimmer of hope through disciplined PT that is correcting it.
In the last short cycle I had of being in shape and on the way to being in better shape, I got hurt again, but during that time I felt when I raced that I could really "throw that front leg out there" with total comfort. The glute and ham problems keep you from doing that. The exercises I am doing now have added strength to muscles that were causing an imbalance in my stride and I am hopeful.
Jim and Raider were just talking about strengthening exercises and I agree with them, but my strengthening exercises are not to make my legs stronger; they are to make targeted muscles play a more active role in helping me to have a better stride, foot plant and hip rotation.
And for me to race well, I have to have all this work well, without any impediments, because I have NO SPEED! Spareribs