Stiffness of muscle seems there morning stiffness is nw tk heat formation with rest time and stretch ur back muscles

Tell him to do core strengthening exercises. And proper stretching of back muscles

Hi..., You husband may be able to avoid back pain or prevent its recurrence by improving your physical condition and learning and practicing proper body mechanics. Exercise. Regular low-impact aerobic activities — those that don't strain or jolt your back — can increase strength and endurance in your back and allow your muscles to function better... Maintain a healthy weight. Being overweight strains back muscles. If you're overweight, trimming down can prevent back pain. Use proper body mechanics: Stand smart. Maintain a neutral pelvic position. If you must stand for long periods, place one foot on a low footstool to take some of the load off your lower back. Alternate feet. Good posture can reduce the stress on back muscles.