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■ It’s refreshing to see a simple workout. These days most trainers go the trendy route, with routines that are more “YouTube blooper reel” than “proven muscle builder.” Kevin Hart’s trainer, Ron “Boss” Everline (), on the other hand, is defiantly old-school. His routine has no Bosu ball squats, no Olympic lifts, no fancy machines—it’s nothing dangerous and nothing you can’t do at home. But proves. And it takes just 30 minutes per workout.