There is a good article on hills to be found on the Runners ' World website.
There is a good poem 'The Hill that is Better than Sex' by Kathy Tytler.
Intervals
There are all sorts of sessions you can do from 200 metre repetitions on a track to mile repetitions.
For marathon training longer intervals are probably better so try kilometre or mile reps starting with a couple and building up to six. It is important to rest well between each repetition and try and run the last at the same pace as the first. So do not go out too fast for the early reps.
One special version is Yasso 800s which have been used to great effect by many elite runners. The aim is to work up to run 10 x 800 metres. The time you take to run 800 metres in minutes and seconds will be a very good predictor of your marathon time in hours and minutes. For example if you run all the 10 reps at 3 minutes 40 seconds you should be capable of a 3 hours 40 minutes marathon. These session are very tough, so build up gradually starting off with only a few reps of 800 metres. If you do not have access to a track, mark the distance out on a safe piece of road or in a park.
Other speed work
Tempo runs – where you run at a pace you can only just hold for the length of the run. It is important to warm up well for these efforts and cool down and stretch afterwards. Start with only a few miles then try and gradually build the distance up.
Speed play (Fartlek sessions) - as the name suggests these should be fun. In the simplest form you put in faster spurts when the fancy takes you. You can give them some structure by running fast past a number of lampposts then slower past some more then faster etc. Or you can use nature, for example, if it is windy run fast when you are exposed to the wind and slower when you are out of the wind. You can do the same thing with sunshine: run slow when you are in the sun and fast when you are in the shade and cooler. If it is very sunny and you have forgotten the sun block you might want to do the opposite.
Running consistently 3 or 4 times a week, every week is the most important thing. The next is adding some variety; if you plod around the same old circuit your body gets used to it and you will soon stop improving.
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