, circuit training, flexibility work, plus some fast running on the treadmill. Oxygen intake sessions and/or hill training outdoors.March-May: Start to phase out some of the gym work and replace it with a combination of sprint drills and short, fast running

In the future, we'll be able to run for ever. Octogenarians will record PBs thanks to organ cloning and advanced cryogenic suspension. Speedy nonagenarians, bored with clocking six-minute miles at the London Marathon, will apply for places at ultras

of running – not mileage totals, not your marathon PB, and certainly not the percentage of VO2 max you can maintain when running at lactate-threshold pace while holding your breath on a treadmill set at a six-per-cent-incline in a hypoxic tent. These Zen

on treadmills, not of cyclists. No one can say exactly how the two differ, but they do. The triathlon legend Mark Allen has lived in those narrow spaces. Allen is the fastest runner ever to win six Hawaii Ironman Triathlons. In 1989, he closed with a 2

. There is no chafing, and it remains comfortable throughout runs of all distances and in all conditions, especially the treadmill - the acid test!Weaknesses: The price is an obvious drawback, but as with other items, the T-shirt can be found cheaper by shopping around

Leading the field: Paula RadcliffeThe Athens Olympic Marathon in 2004 was meant to be Paula Radcliffe's race. Since her marathon debut in London in 2002 the British world record holder had never been defeated over the distance. Certainly the Kenyans

records”, or, “I’m not racing”.Too fast Most runs feel difficult. Your breathing is laboured, your legs feel heavy and you struggle to maintain your pace. Just right Your runs are at a comfortable, relaxed pace, but once or twice a week you run at least

. Recording the daily training of 600 runners during a one-year period, Dr Pate identified two major predictors for injuries: previous injury and heavy training. Those who prepared for marathons with frequent, high-mileage workouts became injured

energy levels – under difficult circumstances. When Pickman resumed running after giving birth to her first child, she ran at home on a treadmill while her baby slept. Later, she used a running stroller so that she could take her child along during her

. If your baby seems uncharacteristically sluggish, consult your obstetrician. Listen to your body If running becomes uncomfortable as your pregnancy progresses, switch to fast walking. Or consider swapping the treadmill for a new contraption