As a fitness writer and mom, I'm always multitasking -- even when I'm working out. I prefer walking and running outdoors for cardio, and I even have a jogging stroller to bring my son along for the ...
The 12-3-30 is a treadmill workout that's harder than it looks. Some people might prefer it to running, but it's no magic bullet for weight loss, and it's not always beginner friendly.
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