dsrunner wrote:
Aerobic / Anaerobic is outdated thinking. You can have a very high oxygen delivery (98-99 percentile) and absolutely suck at the 800/400. Speed is a primary requirement. Volvo never beats Farrari.
Not clear at all that weight work will help your 800 either. It may help or hurt depending on the schedule and your current development. Far more likely your conditioning is lacking at this point.
Of all the strength options, stairs and hills are best. Squats and jump squats would be next. Intervals in the pool or incline walking are also useful. Notice my advice focuses on training hybrids which condition your power and stamina in unison. You want high power to weight, not just strength. Otherwise linebackers would dominate the 800.
The 400 has been rated as high as 33% Aerobic. (Jim Ryun ran 47, and so did Peter Snell. Seb Coe was even faster.) The 800 is nearly 50% Aerobic.
Continue running long distances up to 7 miles for sure. Do speed/sprint development such as 50-60-70-80 meter repeats, jump rope, plyometrics, hills, bounding up hill, down hills, fast dynamic running. In everything you do increase volume and intensity GRADUALLY!!! Always get a recovery day after a workout. (Meaning the speed/sprint days) You do want to do some tempo runs ending with going at race pace. -Build to it- Learn how to run with classic form. Have a sprint coach teach you how to accelerate. This is not a complete plan!
*Overall the key to your success will be how many miles you run. Lots of them can be quite slow.
Use common sense in your total lifetime. There is more to know about running than running.