The speed of jogging varies from person to person, and age, exercise level and physical fitness will all affect the running speed. Generally speaking, jogging is only 5-8 kilometers per hour.

Heart rate-"bull's-eye rate" can also be used to determine the running speed for health preservation.

The formula for calculating the bull's-eye rate is [(220- age)-static heart rate ]*(60%-80%)+ static heart rate.

For example, a 60-year-old person's static heart rate is 70, so his optimal heart rate during exercise should be controlled between 124- 142.