How long you should walk or run on the treadmill depends on whether your goal is weight loss or cardio fitness and health.

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.