Work out the muscle mass of the shoulder girdle-- pectoralis minor, levator scapulae, rhomboids, and trapezius-- to avoid osteoporosis-related vertebral fractures. And turn on the hip girdle muscle mass-- glutes, quadriceps, and also hamstrings-- to aid keep flexibility. Below, Joe Pujol, a human performance scientist at Southeast Missouri State University clarifies why our muscle mass shrink in time, and how to assist prevent several of that loss. To help physicians screen patients for…