Fitness start-ups flex muscles

20 October 2019 - 00:06 By MATTHEW FIELD

My trainer is taking me through a new routine, dipping low into a squat jump and up again. "Keep those reps up!"

This is not a normal living-room workout or an outdated fitness DVD. A heartbeat tracker, strapped to my chest, pips along to my progress. My calorie burn appears on screen, and reps (repetitions) add up as a notification on the TV screams: "New personal best!" My smartphone tabulates the data and ranks my performance...

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