From Hot Girl Walks to treadmill workouts ... But taking the crown for the most popular trend is the ‘30 day gallon challenge’, with a third of British social media users trying it, according ...
The 6-6-6 walking challenge involves ... It comes after the 12-3-30 trend, which involves walking at a 12 percent incline for 30 minutes at a 3 mile per hour pace on a treadmill.
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