What might be a consequence of not monitoring heart rate in CrossFit training?

Monitoring heart rate during CrossFit training is essential for gauging workout intensity. By tracking heart rate, athletes can ensure they are working within their target heart rate zones, which are crucial for optimizing cardiovascular conditioning, managing fatigue, and preventing overtraining. Without this monitoring, an athlete may not accurately assess how hard they are working, potentially leading to workouts that are either too easy, resulting in minimal progress, or too difficult, increasing the risk of injury and burnout.

In contrast, the other options focus on positive outcomes that are not typically achieved without proper intensity monitoring. For instance, while muscle growth or cardiovascular health are beneficial, these outcomes frequently rely on the ability to precisely moderate exercise intensity to stimulate the body appropriately. Failure to monitor heart rate compromises this ability and may hinder overall performance and results in CrossFit training.