Final answer:
The percentage range of maximum heart rate for students' exercise in a physical education class is typically between 50% and 85%.
Step-by-step explanation:
For students' exercise in a physical education class, the percentage range of maximum heart rate is typically between 50% and 85%.
Let's consider an example: If a student's maximum heart rate is calculated to be 180 beats per minute (bpm), then their exercise heart rate should be between 90 bpm (50% of 180) and 153 bpm (85% of 180).
It is important to note that the actual percentage may vary depending on factors like age, fitness level, and specific fitness goals.