FlippinChicken wrote:
Speed work sounds like a good next step. I think I've hit a peak with just 'going out for a jog' kinda training, so if I want to improve the times I'll need to be a bit more structured.
OK, as promised...
You've hit the nail on the head with that bit in bold. You need to mix up your training, not just to achieve better results, but to keep yourself interested. Pounding endless pavement is a little bit tedious, no matter how motivated you are.
Don't get me wrong, you do still need to do some 'over-distance' stuff - as mcjihge2 says, you can't neglect the stamina altogether - but for a 5km run, you don't need that much stamina. In real terms, running for a shade over 21 minutes isn't that far.
Also, bear this in mind: when I was running the 400m, which is still classed as a sprint, I spent a lot of time focusing on ways to control my speed there. Ie, for the middle 150m of the race, I was 'running relaxed' while sprinting, so that I had something to kick with in the last 120m - so you definitely need to do it when you're running 5km.
A lot of long distance runners will run hundreds of 'empty miles', in which they're not pushing themselves and not getting any faster. This is only really useful if you're running marathons. Again, pointless for shorter distances.
You want to reach the point where you can run relaxed, and know you have stuff left over, which improves your confidence and, should you ever need it, will give you the ability to kick on the home straight, which is the best strawberry floating feeling in the world. Especially if you have a nemesis that you're aiming to beat. Imagine staying on his shoulder for the duration of the race - let him do the hard work into the wind, and up the hills, while you stay relaxed behind him, only to outstrip him at the end.
To achieve this, you need to expose your legs to faster speeds, in order to make your race pace feel slower. Again, don't ignore the stamina work, but do sessions like some of the following, which
Hills.
People hate hills sessions, but I love them because they are so effective. For your parkrun, these will be perfect. I used to do short, steep hills, but you won't need that. Find a long, slow upwards drag - one that takes you 1min30/2min from bottom to top. Start easy - four or five reps in a session. Walk back down the hill to begin with, but build up to jogging slowly back down. Try not to stand still, even to recover when you get to the top. Make sure you use your arms to drive up the hill and lift your knees as well as is comfortable. Build up to doing more reps - if you can do a session with 8 hills at decent pace, jog back recovery, you'll breeze up them when you come to parkrun time.
Out and back.
This one teaches you to control your pace. Pick a run you like - about a mile long, no more - and head out. Make sure you time yourself. Aim to run at no more than 80% of your max effort. When you hit the furthest point, turn back and head home the way you came. Aim to beat your time for the half-way mark by at least ten seconds. To avoid cheating yourself, the aim should be for your overall time to still be respectable.
Fartlek.
This one is pretty well-known, but is again about changing and controlling your pace, but running relaxed at the right time. The exact methods vary, but the one I used to do was as follows. Basically, you run for a set period of time, in a multiple of three minutes. 21 would be perfect, but feel free to extend it as you see fit.
As each minute passes, you change your pace. Start with a very slow jog for a minute, then run 'medium'/cruising pace for a minute, then run harder for the third minute. Then go back to the jog, and repeat. The key is make the three stages distinct, regardless of your actual pace. Try not to reach the stage where your phases are blurring into one single pace. If you're doing it properly, you'll be grateful for the jogging phase after about eight minutes.
If you can start to drop in some of these amongst your regular training, I'm 100% confident you'll demolish that 5km time and beat your nemesis.
HTH,
Steve