Which observation indicates that a client tolerated ambulation without distress after 3 days of bed rest?

The observation that indicates a client tolerated ambulation without distress after 3 days of bed rest is indicated by the increase in pulse and respiratory rates during ambulation. It's normal for these rates to rise moderately during physical activity, especially following a period of inactivity such as bed rest. This physiological response suggests that the body is adjusting to the increased demand for oxygen and blood flow required during movement, which is a sign of cardiovascular and respiratory systems functioning appropriately in response to the activity.

The other observations, such as dizziness, weakness, an inability to maintain an erect posture, and profuse perspiration, point to potential distress or adverse responses to the ambulation. These signs can signal that the client is experiencing complications or is not effectively acclimating to increased physical activity, which is contrary to the goal of demonstrating a successful tolerance to ambulation following a period of immobility.