![Personal trainer reveals whether low-impact '12-3-30' workout is really beneficial | Daily Mail Online Personal trainer reveals whether low-impact '12-3-30' workout is really beneficial | Daily Mail Online](https://i.dailymail.co.uk/1s/2022/02/21/19/54472451-0-image-a-42_1645472706114.jpg)
Personal trainer reveals whether low-impact '12-3-30' workout is really beneficial | Daily Mail Online
Horizon Fitness - You've likely heard of the 12-3-30 treadmill workout craze. What is it, exactly? 12% Incline 3.0 MPH Speed 30 Minutes It's easy enough to not be intimidating, but challenging
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