While you were off on your 45-minute jog, scientists at McMaster University in Hamilton, Ontario, were conducting a study about "interval training," which is what athletes call very brief but extremely draining bursts of exercise, such as sprints. According to the study's findings, the extra 44 minutes of your jog might have been entirely unnecessary — 60 seconds of strenuous exercise is apparently just as successful at boosting health and fitness as 45 minutes of a lighter workout.
This is extremely good news for anyone who has trouble fitting a 45-minute workout into their day, but bad news for anyone who was using the excuse of not having enough time to exercise to avoid putting on the running shoes. You now have literally no excuse.
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