Aim for a 1- to 2-minute plank. “At this age, you are very adaptable, making it a great time to build strength and develop healthy fitness habits,” Carnevale said. Keep that 1- to 2-minute hold going ...

Compared to your regular walk, you’ll burn a lot more calories rucking, as your muscles will be working harder to move. As a form of strength training, over time, rucking will help you build and ...