Final answer:
During a Pushing assessment, if the head juts forward, the overactive muscles are typically the sternocleidomastoid, levator scapulae, and upper trapezius, which suggest a muscle imbalance.
Step-by-step explanation:
If the head juts forward during a Pushing assessment, the muscles that are likely overactive include the sternocleidomastoid, levator scapulae, and the upper trapezius. This forward head posture can be indicative of a muscle imbalance where these muscles are too tight or overactive, potentially due to prolonged periods of sitting, poor ergonomics, or lack of proper stretching and strength balance in the neck and shoulder region. To correct this imbalance, it's important to not only focus on stretching the overactive muscles but also on strengthening the opposing underactive muscles such as the deep cervical flexors.