When you book an aerobics class or instructor near you, expect to do some indoor cycling, kickboxing, or choreographed movements for around 40 to 60 minutes. You might also do a variation of Zumba. Each session starts with a warm-up period and ends with stretches to help you cool down. Since you’ll be booking a private instructor through Airtasker, you might also expect to be asked to do other aerobic exercises, such as walking, swimming, and running.