The debate rages on for doing squats. Whether you love them or loathe them, here’s an important lesson to keep training hard and staying injury-free. — Years ago, my best friend told me his grandpa used to play college football. Apparently since those glory years, his grandpa had terrible back pain, struggled to stand upright and told him that deadlifting was to blame. Now I don’t know if deadlifting was really to blame. …