to 200 metres. Your 200-metre time should be about 10 seconds more than your 100-metre time. Estimated Burn 340 calories BRAD HUDSON’S MILES AND HILLSBrad Hudson, a former 2:13 marathon runner and coach, likes to incorporate lots of short hill sprints

. First, there's the 100kcal-per-mile expenditure: run 15 miles and you burn an impressive 1,500kcal. You may even burn more than 110kcal per mile, depending on the amount of oxygen you use while running and on your body weight. (It costs more oxygen

starting and stopping a car, which uses more petrol." A 10.7 stone (68kg) runner doing a four-miler at a nine-minute/mile pace burns about 480 calories. But you can torch more calories, speed weight loss and spark up your runs by swapping that four

, because running – especially quicker-paced running – is one of the best ways to fire up your metabolism (and keep it fired up). But to get maximal metabolic boost, you need to add weight training. Tweak your running sessions as well, and try to train twice

, depending on the intensity of your run. So, although intense exercise doesn't burn a lot of fat at the time, you will burn more in the long term. Plus you get the extra benefits that come with working your body harder."2. Weight WatchingMistake: Hopping

-out with a friend who is also trying to lose weight. You’ll motivate each other. A 30-min pm/45-min am run will burn more than 1,000 calories in total for a 12-stone man – and many of those will be fat calories.Pump up the Weight LossBy adding a once

) after exercise speeds glycogen recovery compared with carbs alone. A milkshake or yoghurt would therefore be better post-workout choices than a pasta feast.Change your ways Aim to consume 1.2-1.4g protein per kilogram of body weight (84-98g if you

a healthy diet. Which is half the weight-loss battle.The other half, of course, is keeping the pounds off. Here again, runners have an advantage, because exercise is the most important factor in keeping weight off.So don’t wait another minute: you

starting and stopping a car, which uses more petrol." A 10.7 stone (68kg) runner doing a four-miler at a nine-minute/mile pace burns about 480 calories. But you can torch more calories, speed weight loss and spark up your runs by swapping that four

in Days 2-5 are for Runner's World magazine subscribers only. (The good news is that you can get instant access to the articles, 12 issues delivered to your door, AND 30% off here). To begin with, here's how to make the most of running for weight loss