For maximum fat-burning, focus on your form. Walking correctly engages more muscles, which then use up more calories. The main rules: Don't stare at the pavement - stand tall, with your chin up. Do bend your elbows and pump your arms, so your fists swing in an arc. Do spring off your toes - push off as if you're trying to display the soles of your shoes to someone behind you. And don't forget to stay hydrated.
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