Better than traditional sit-ups that only target the top abdominal muscles, these bendy crunches help engage the whole core. "People don't always [know to] target the side muscles, the transverse abdominals and obliques," says Brian Dietzen.
Another trick that helps Brian Dietzen stay in shape? Wearing his activity tracker. "I wear my Microsoft Band 2
activity tracker whenever I work out (and pretty much all the time). It's a good way to keep track of my heart rate, calories and time spent on each exercise."
Photo credit: Monty Brinton/CBS
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