Look back to the poster you designed in the week before the holidays.
Watch the slideshow again.
1. Which kind of exercise do you think would exercise the most muscles: star jumps, squat jumps or running?
2. Test out the different exercises to see how you feel after/during each one and which muscles you think are working the hardest.
EXTEND - Think about your heart rate and how your pulse for each exercise will tell you how hard the different muscles are working.