Which of the following is an indication that a client with hypertension should take a break from exercising?

The indication that a client with hypertension should take a break from exercising is dizziness or lightheadedness. These symptoms can signal that the body is struggling to maintain an appropriate level of blood flow and oxygen, which can be particularly concerning for someone with hypertension.

When a person exercises, their heart rate increases, and blood pressure may fluctuate. In individuals with hypertension, these changes can sometimes lead to inadequate oxygen delivery to the brain, resulting in dizziness or a lightheaded sensation. If a client experiences these symptoms, it's a warning sign that they may be exerting themselves too much or may need to modify their activity level to ensure safety.

Feeling energized and increased stamina are typically positive outcomes of exercise and suggest that the client is responding well to their fitness regimen. A consistent heart rate may indicate that the client is in a controlled exercise zone; however, it doesn't necessarily indicate that they are not experiencing other physiological stressors. Thus, monitoring for symptoms such as dizziness or lightheadedness is crucial to ensure the client's safety during physical activity.