Hello Fitness Warrior The more you train, the stiffer you become and then more aches and pains you seem to have to manage.  Each training session, you warm up but don't quite feel your range of motion and flexibility should be.  Reduced ROM - range of motion due to tight muscles puts you at risk of injury because when you get going, you add force and explosiveness to your movement or game, and if your ROM is hampered, it places extra stress on tendons and supporting muscles.  I am you are foam rolling, and this is essential for muscle facia...