."Walking is underrated," he says. "It can be demanding: an 81kg person will burn around 100 calories per mile. If you find it hard to run below 65 per cent of your maximum heart rate, now is your chance to exercise at a lower heart rate, which will improve your fat
-threshold workout. Take 10 minutes to warm up. Then do two sessions of 15 minutes each at threshold - your highest sustainable effort. Take note of your average power and heart rate. Include a 10-minute recovery time between efforts, during which you are going at 60
stroke to help develop bilateral breathing – breathing on both sides) 12 x 25m, done as a 25m drill with a 10-second rest followed by 25m full stroke and a 10-second rest Main-set pyramid (all with 20-30-second recovery) 8 x 25m, 4 x 50m, 2 x 100m, 1 x
