How is moderate weakness on the extremity strength scale classified?

Moderate weakness on the extremity strength scale is classified as a score of 3. In the context of the muscular strength grading scale, this classification is typically based on the ability of the individual to move a limb against gravity and provide some resistance. A score of 3 indicates that the muscle strength is present, but it is not strong enough to effectively overcome gravity in a full range of motion when resistance is applied. Therefore, when assessing limb strength, a score of 3 reflects moderate weakness, which can impact a person's mobility and functional ability. Understanding this grading is crucial for diving supervisors, as they may need to assess the physical capabilities of divers prior to diving, ensuring that all participants are fit for the activity.