Final answer:
Experience is generally not a common barrier to getting proper exercise; while safety, health problems, and injuries are (4). Experience can be overcome with guidance, whereas the others are more prohibitive.
Step-by-step explanation:
The question asks which of the following is not a common barrier to getting proper exercise: 1) safety, 2) health problems, 3) injury, 4) experience. Safety concerns, health problems, and injuries are indeed common barriers as they may prevent individuals from engaging in physical activity due to risks or physical limitations.
However, experience is generally not a barrier. Lack of experience might make one feel uncertain about how to begin exercising, but it is an obstacle that can be overcome with information and guidance, not one that prohibits exercise by its nature. It's important to note that maladjustment and health can be impaired if physical exercise patterns deviate significantly from an optimal level.
Moreover, proper rest and recovery, as well as the avoidance of risky behavior and unhealthy consumption habits, including tobacco use, play essential roles in maintaining one's ability to exercise and achieve a healthy lifestyle. Addressing excuses and finding enjoyable activities can also help overcome perceived barriers to exercise.