Final answer:
To prevent injury from pressure, obstruction, or stretching, one should monitor pressures in the body, use invasive methods for pressure measurements, and follow proper warm-up and exercise techniques.
Step-by-step explanation:
To prevent injury from pressure, obstruction, or stretching, several criteria should be met. First, it is important to monitor pressures in various parts of the body, as they can provide valuable medical indicators. Second, during surgery or for patients in intensive care, pressure measurements are often obtained through invasive methods involving the use of catheters. Finally, when exercising or stretching, it is crucial to follow proper warm-up techniques, avoid pushing joints to the point of pain, and respect any discomfort by stopping the activity.