Sometimes in life, you really can't beat the old stuff. Old friends, old tunes, old movies - we love them all. And when it comes to working out, it seems we're partial to going retro too: indoor step ...

Created (and demoed) by Zocchi and the other trainers behind the fitness app Centr, here is a ten-step, no-equipment workout that combines compound exercises with high-intensity cardio for a full-body ...