Raul plans to start jogging after being sedentary for 2 years. what is the first step he should take? make sure he is medically healthy enough to exercise. practice warming up with 20 minutes of static stretching. review the routes he plans to run. start a weight training program to condition his legs.

The right answer is: practice warming.

If Raul starts jogging after the cessation of activities for a reason such as lack of time, lack of desire, injury (or a pregnancy in women):
He must insist even more on warming up, it's twice as important when his body is not used to sport. The sensations felt will serve as an indicator. The more he warms up, the less body aches the next day.
Progressing slowly instead of doing too much exercise for your body.
Listen to his body and pay attention to injuries.

They are all in a iving organism.