【The correct way to use the elliptical machine】 This can easily injure the knees and cause leg problems to become more and more serious.Correctly, the upper body should be in a straight line from top to bottom and lean forward as a whole stretch your hips and back.The core needs to be tightened so that the calves are perpendicular to the pedals and the toes are pointed forward and slightly outward.And the big toe grips the ground and the knees need to be in the direction of the second and third

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