3.
Nov 11, 2007 2:26 PM

in response to:
Guest
You are going to get varying opinions on this question, particularly since you didn't give any information regarding how often or how many miles you currently run. Some may even say that you shouldn't even be thinking about speedwork if you aren't currently running 35+ miles a week for the last 6 months! But I am going to give it a try....
Given that you said you feel tired after doing four miles and farlek work would seem difficult, the solution may be as simple as just slowing down on those four mile runs. Most runs should almost be done at a conversational pace, meaning that you shouldn't be short of breath or unable to carry a conversation. If you're training for your first half marathon your schedule should include at least two days of easy running (conversational pace) a week, one day where you would do some speed work (farlek, tempo or distance repeats), and your long run on the weekend that would be even slower than the weekly easy days.
You have to introduce any type of speedwork gradually since the risk of injury increases if done too fast, too often, or too long. My suggestion would be to do something like this: Take one day during the week, warm up for a couple of miles very easy, then run at a pace that you could not hold a conversation at for two minutes (you shouldn't feel like you're going to puke, that would be too fast), recover by jogging slowly for the same two minutes, then repeat. Do two of those the first week and see how you feel. Gradually you can increase the amount that you do and the length of time. If you can, do this at a track or a park that has softer trails rather than on a street, just easier on the body.
Again, given what you offered, this would be how I would start out. Good luck and keep us up to date.