Running Tips for Older Runners - Training Tips to Run Strong as You Age
Not every “hard” workout has to be a killer session. You can sneak in more quality without going to the well by stopping at a track, on a hill, or an obstacle-free stretch of road toward the end of a run and doing a few up-tempo repeats between 200 and 800 meters.
runnersworld.com • These Mini Tips Will Help You Stay Active for the Long Run
Running doesn’t get easier with age, but the payoffs grow greater. While none of us can know for sure that running will add years to our life, there’s no doubt it will add life to our years. Which is far more rewarding.
Amby Burfoot • Run Forever: Your Complete Guide to Healthy Lifetime Running

As for the lower body, you can gain power through your glutes by doing high reps of squats while holding a bar or dumbbells. I don’t normally focus much weight work on the lower body, but I do include some eccentric quad