Is a self-improvement strategy for a person who has trouble sticking with individual fitness activities. Performing fitness activities only on weekends
Participating in scheduled team activities
Placing all workout gear near the door
Recording web-based fitness broadcasts

I would say participating in scheduled team activities as it sets a social requirement and expectation for the person and holds them to a standard. If you are exercising alone you can skip a week or not finish and only be judged by yourself. However if it’s a scheduled & continuous activity with team members you are more obligated to show up and exercise from social & schedule expectations.