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Is Cardio Dead?

“But why go to the gym three days a week when you could go just once? In his book Power of 10 (HarperCollins), Adam Zickerman, the owner of Manhattan’s InForm Fitness Studio, argues that 30 minutes a week of slow-motion weight training burns more calories than regular-pace lifting and is enough to get — and stay — in shape. ‘If you do sit-ups quickly, you’re working off momentum, but if you do them incredibly slowly, you’ll use nearly 100 percent of your abdominal muscle fibers,’ Zickerman says. And working more muscle means burning more calories.”