Kudzu Runner, I'm older than you by a decade. Here's my take.
It's absolutely critical that older runners avoid injury. I literally carry tape and at least two pair of shoes and inserts to every workout. If I get even a twinge that continues rather than going away, I stop and try my best to fix it... not much help with a hamstring, but it works for foot, ankle, knee, etc.
Eat right. Take supplements... vitamin B, C, D3, E, selenium, multivitamin, etc. The cells become less efficient in using nutrients, but you can compensate somewhat by making sure they have enough of the raw materials for healing, recovery, and reducing low-grade, chronic stress to the immune system.
Here are some things that I've found work with a minor hamstring injury.
-Epsom salt baths
-The stick (It works for the body of hamstring, but doesn't help much when the injury is where the hamstring connects to the hip.)
- The QPoint2 recovery ball. It's basically two hard lacrosse-sized balls in a sleeve that you microwave and then sit on. It helps a lot. You can find them at
http://www.qworkoutrecovery.com
. Don't microwave them for 90 seconds. That's way too long... 45 seconds will be enough. I have the combo set, but I've never used the single ball. This thing is pretty amazing. If it doesn't work for you, you're only out about half the cost of one massage session.
- Don't stretch a fresh hamstring injury. You're just re-tearing scar tissue that isn't strong enough to hold yet. If you hurt it stretching (or running) the healing process restarts at day one.
- You can begin VERY light stretching in a couple of weeks and resume normal stretching after 6-8 weeks. Normal stretching should never be done with cold muscles.
- If in doubt, stretch easier instead of harder.
- I jog a mile or so, do some dynamic drills that include light stretching, do some easy strides, and then do the hamstring and hip flexor (a problem for me) drills again.
- Avoid sprints and speedwork. Limit your range of motion until the hamstring heals. If you break this rule and re-injure the hamstring, healing starts over at day one.
There's more, but this is too long already.