If you are training to run a trail race or ultramarathon the obvious thing to do is run. But, perhaps counter-intuitively, you should include walking in your training programme and a lot of it.
There are a number of reasons for this to do with training intensities, injury prevention and fitting volume into your busy schedule.
The days of “no pain, no gain” are over. Sport science has moved on and now even the top athletes dedicate about 80 per cent of their training to “easy…