How can poor posture result in back pain? a. bad posture can result in tight muscles. b. bad posture hyperextends the spinal column. c. bad posture increases back flexibility. d. bad posture reduces stress on joints and tendons.

A Poor posture's most common effect is sore muscles. As you slouch or practice other methods of poor posture the muscles work extra hard to keep the spine stabilized and protected. However, the extra work can cause muscle tightness and fatigue. This in turn lead to chronic issues with tight and sore muscles all the way down to the lower back.