A truly underrated bit of fitness kit, a Bosu ball (short for "Both Sides Up") has a dome side that's like a classic Swiss ball, and then also a flat platform base - and you can use it either way up, ...

Whether you’re a fitness class vet or a total newbie like ... is roughly 45 to 60 minutes and designed to be a full-body, muscle endurance workout (as I've definitely experienced).