It’s easy to see how this ritual would wake you up (along with, potentially, your downstairs neighbour). But what of the other purported payoffs? Does the 50-jump challenge really boost circulation, increase bone density, improve lymphatic drainage, boost mood and give you a dewy glow, as many online have claimed? And should we all be starting our days this way, as opposed to lumbering sleepily out of bed in search of coffee?