FOR MANY PEOPLE, the mere mention of the C-word conjures images of wiry runners stoically looping the local park. But cardio needn’t be torturous - and what you do in the gym can cut minutes off your run times, no extra kays needed.
At its core, cardio is just aerobic training; that is, any activity during which the heart is able to supply enough oxygenated blood to fuel your efforts, whether you’re skipping or squat-jumping.
