Final answer:
A warm-up portion of a session consists of exercises that gradually increase the heart rate and warm up the muscles. It should include activities like jogging, jumping jacks, and dynamic stretches. Skipping warm-up is not recommended as it can lead to injuries and decrease performance.
Step-by-step explanation:
A warm-up portion of a session is important to prepare the body for more intense physical activity and to prevent injuries. It should consist of exercises that gradually increase the heart rate and warm up the muscles.
This can include activities like jogging in place, jumping jacks, or high knees to get the heart pumping. Dynamic stretches, such as leg swings and arm circles, can help loosen up the muscles and increase flexibility.
The warm-up should also include movements specific to the activity or sport being performed. For example, if you're about to play basketball, some light dribbling and shooting drills can be included in the warm-up.
Skipping warm-up is not recommended as it can increase the risk of injuries and decrease performance. It's important to give your body time to adjust and prepare for the demands of the activity.