Getting outside does untold wonders for our mental and physical health - but when the weather makes the idea unappealing, it's good to have a backup. If you're a runner or keen hiker, a treadmill workout is the perfect stand-in.
Fresh air and terrain difference aside, there's not much you miss out on by swapping your outdoor exercise for an indoor walk or run. So long as you keep your heart rate up (you can use a fitness tracker for this), you'll be working on your cardiovascular, muscular, bone, metabolic, and brain health in under 20 minutes.
