The reality is that a very small percentage of the population has enough intrinsic motivation, the kind that makes us do something because the behavior itself is enjoyable or satisfying, to stick to a workout plan on their own. For the majority of us, the accountability of the group can make up for where motivation is lacking, or when the motivation starts to fade away. Group exercise can turn working out into a fun social activity, which could lead to you continuing to do it.

"The communal benefits of coming together with friends and colleagues, and doing something difficult, while encouraging one another, pays dividends beyond exercising alone," Dayna Yorks, of the University of New England College of Osteopathic Medicine, said in a news release.

As humans, we crave connection. Surrounding yourself with a group of similar people can make the process of exercising easier, more enjoyable, and more habitual. Friends can serve as positive role models, provide reminders and encouragement, and even serve as a little friendly competition! Aside from the physical benefits, research has shown that people who feel more connected in their exercise class attend more sessions, arrive on time, are less likely to drop out, are more resistant to disruption, and are more likely to have greater mental benefits from the exercise.