Arnie Schwarz wrote:
I wouldn't be as concerned with leg weights. Yes, you should do some but I wouldn't make it a primary focus. I would concentrate more on upper body and core strength. Work on biceps and triceps. A good goal would be to bench your weight. After achieving that, move on to 110% of your weight and reps.
This is not great advice. Injury prevention aside, you should absolutely do “leg weights” (deadlift/squat). They will greatly enhance your ability to generate force into the ground, thus making you more powerful thus translating into improving your sprinting ability and stride length. If done correctly, they will also tax your “core” (posterior chain) as you need to flex and hold you ab/lower back muscles to brace and hold the weight. Really, they are whole body lifts, and every athlete should be doing them.
For upper body, I’d stick to bench and overhead presses, as they are multi joint lifts that work your back and “core” (to brace the weight). Although not as important as deadlifts or squats, doing these will simply just contribute to making your whole body stronger, which again, makes you a better athlete, and thus a better runner. You could maybe add rows or chin ups, but pressing is great.
I wouldn’t worry about “triceps/biceps” as mentioned above. Bigger/stronger arms aren’t very useful in running and are a waaaaaaaaaay lower priority than the lifts I discussed. Doing the presses and rows will work your arms enough. Prioritize the others I mentioned, ESPECIALLY deads and squats.