With many of us plunged into tier 4 over the past week, gyms and exercise classes are closed once more, meaning a return to the at-home workouts we’ve become so accustomed to in 2020. And if you don’t fancy forking out some cash on any hi-tech equipment (although the likes of Aldi’s new at-home exercise range might help you there), there are classes you can take that don’t require you to have much with you at all.