Fitness: Is high-intensity interval training worth the pain?

With study after study proving that high-intensity interval training (HIIT) workouts are an express pass to improved fitness, it’s clear that short, high-energy bouts of exercise are just as effective as longer, less intense workouts.
But as tempting as it is to give up workouts of 30 minutes or more in favour of those that take less than half the time, there’s one feature of HIIT workouts that may cause the average Joe and Jill to think twice before jumping on the bandwagon.
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