Feeling gutsy? A postmenopausal fitness enthusiast claims she’s got the 10-minute trick to reduce belly fat. In the 10-second clip, set to “Maniac,” Siobhan stands on a yoga mat with her feet apart.

Let’s be real. In today’s buzzing world, nobody’s got hours to spend in the gym. But what about that stubborn belly fat? How about a quick, 10-minute pilates workout you can do from the comfort of ...