Which type of joint is characterized by excessive movement beyond normal limits?

A hypermobile joint is characterized by excessive movement beyond normal limits due to increased flexibility in the connective tissues surrounding the joint. This condition can occur because of genetic factors, specific training, or certain medical conditions, leading to an increased range of motion in the joint. Hypermobile joints can move more than what is typically expected, which might lead to greater risk of injury if not monitored or managed properly.

In contrast, a hypomobile joint refers to a joint with limited movement, which is the opposite of hypermobility. Both amphiarthrotic and synovial joints describe types of joint structures based on their function and anatomy rather than their range of motion. Amphiarthrotic joints allow for limited movement, while synovial joints are characterized by their ability to facilitate a wide range of motion, but they do not inherently denote excessive movement like hypermobile joints do. Therefore, the key characteristic of excessive movement points directly to a hypermobile joint as the correct answer.