flagpile wolly wrote:
would there be a substantial payoff if said runner does not get injured?
Sure. But of course avoiding injury is the problem! Still, this might be a great help to you. Couple notes:
You say "heavy lifting." I'm assuming that means lifting heavy weights, but *not* a large number of sets (nor a large number of reps per set). Go with two or three sets per body part, with weights that permit (say) six to twelve reps per set. (The lower reps would be stuff like chest and triceps; the higher reps for back/legs/biceps. Abs/core could go higher still, perhaps 20-30 reps per set.) Lifting heavy weights, with limited sets and reps, will increase your strength with little or no weight gain.
A general warmup is good before lifting. (Some do their abs at the beginning of the session. This seems to get the whole body warm.) A specific warmup (a set of ~10 reps at about 3/4 of your "workout" weight) is also helpful, particularly as you increase the weights you're lifting.
Don't blast into gut-busting, maximum-weight sessions right from the beginning. Give yourself a couple weeks to learn the movements properly, while gradually increasing the weight from very light to moderate.
Run after lifting, if you can. Any tightness from the lifting loosens up in a few minutes. On the days that you do leg exercises, your running afterward ideally should include a few acceleration runs wherein you build to top (or nearly top) sprinting speed. Don't attempt this for the first 2-3 weeks of your lifting routine, however. (And recover completely--several minutes' walking is good--between the top-speed accelerations.)
Finally, monitor your recovery. Check your waking pulse (count it for a full minute) before you get out of bed in the morning; if it's elevated, particularly 10% or more above normal, then you've probably recovered incompletely. Also be alert for any signs of boredom or reduced enthusiasm--these are *physical* changes prompted by insufficient recovery.
Remember that late October and November are what count the most. Good luck this year!