Final answer:
When the arms fall forward in the Overhead Squat (OHS) assessment due to underactivity, it indicates an underactive state in the muscles. This can be improved by strengthening and activating the underactive muscles.
Step-by-step explanation:
When the arms fall forward in the Overhead Squat (OHS) assessment due to underactivity, it indicates an underactive state in the muscles. This means that the muscles responsible for stabilizing and supporting the arms during the exercise are not adequately activated.
Underactive muscles can be the result of various factors such as muscle weakness, imbalances, or poor activation patterns. To improve the OHS performance, it is important to focus on strengthening and activating the underactive muscles through specific exercises and proper form.