Quote:
Originally Posted by SomethingClever
I don't know how to precisely define when an exercise becomes anaerobic, but a 400 at a 6:30 pace is not anywhere near the top of my capability, considering I can run a full mile in close to 6 flat. I definitely feel warm enough after a few minutes to run a 97 second quarter without hurting myself. I expect that my fastest quarter at this point would be around 70 seconds, +/- 2 seconds.
This much may be true. But also it's not like running 5ks is my job. I just kind of selected the distance as an arbitrary measurement of overall running fitness. Yeah, I want to lower my time, but my real goal is just to be healthier, faster and sexier. Lately I haven't had time to get many longer runs in so I've been doing the intervals as a way to get a decently intense workout done in a short time.
SC,
There is no way you are warmed up enough after only a quarter mile of running to be going at 85 to 90%. Any running book, training plan, or even a magazine would tell you that you need to work out for at least 10 minutes to be ready for that. If you dont believe me, just look up some external source, and see if you can find something that lets you do sprints after 2 mins of warmup. Your legs are just like any other muscles in your body, and good weightlifters dont start doing their heavy set after 2 mins in the gym.
You are not necessarily going to notice the difference, especially if you are relatively new to running (except you will probably just feel more tired for the workout, and resent the fact that you did the longer warmup in the first place). The thing with running is that if you dont do this injury prevention and do all the little things right, you wont notice a problem until something gets pulled, torn, or damaged to the point where you have to stop running for 6-12 weeks. If your goals are to get healthier, faster and sexier, then ALL of those require that you dont hurt yourself. An optimal workout plan will also let you meet all of these goals faster. 400s are not your friend.
Also, how fast you are running quarters has almost 0 relation to how fast you will run your 5k, so it really is no measure of your fitness at the moment. The captain of my cross country team in college could run under 30 mins for a 10k, but he could not break 60 seconds in the 400. If you dont have the time to do a long workout, do a 10 minute warmup, a 5-10 minute tempo run (go at like 75% pace, push but dont kill yourself), a 10 minute cooldown + obviously standard stretching. You will see much bigger gains with that kind of training.