Weight loss: is there really strength in numbers?

Obesity is a significant health challenge worldwide, and finding effective strategies for weight management is essential. A common question is whether losing weight is more effective in a group setting or solo. 

Let's delve into the latest research to get some insights.

The power of social influence

In short, the research suggests that teaming up with others can be more effective for long-term weight loss than going it alone.¹ A great example of this is the Shape Up Rhode Island programme, which was a 12-week online competition aimed at helping people lose weight through team effort.²

During the campaign, thousands formed teams to compete in weight loss and physical activity challenges. The programme capitalised on team dynamics to enhance individual success, emphasising teamwork and accountability. With strong team spirit and social support, participants who felt influenced by their teammates saw better results.² Notably, 33% of competitors lost at least 5% of their initial body weight, showing the value of a team-focused environment for achieving significant weight loss.² While we appreciate that the environment in which these participants carried out their efforts isn't exactly the same as it may be here at home in the UK, the premise remains true.

What drives commitment to a plan?

A structured plan with regular check-ins can make a big difference in how well people stick to their weight loss efforts. Programmes that closely monitor participants have a 65% higher rate of adherence compared to those that leave you on your own, especially when combined with social support.³

Furthermore, the meta-analysis of various studies found that people generally stick more to diet-only programmes than to exercise-only routines.³ This could be because dietary changes often result in more immediate, visible results compared to exercise, which can motivate participants to stay committed.

How we integrate group dynamics into our approach at Numan

Using group dynamics and social support in weight loss programmes creates a supportive environment for lasting change. Group activities and social networks provide essential motivation and accountability. 

Numan’s referral programme leverages social support for better weight loss results. By inviting friends to join the Weight Loss Programme, participants not only save money but also gain shared motivation and accountability. Research shows that having a partner can make you 29% more likely to stick to your goals, and Numan encourages partnerships that celebrate wins together.³

On top of that, our 2025 Total Health Challenge offers year-round guidance. By promoting sustainable habit-building through monthly themes - from fitness to mindfulness - this challenge embraces a shared, holistic approach to weight management. 

The numan take

Research demonstrates that social support and structured plans are effective for weight management. Considering obesity's status as a major public health issue, integrating these strategies into weight loss programmes is crucial. Embracing social support and structured planning can make a real difference to health outcomes.

References

¹ Street, S., & Avenell, A. (2022). Are individual or group interventions more effective for long-term weight loss in adults with obesity? Clinical Obesity, 12(5), e12539. https://doi.org/10.1111/cob.12539

² Leahey, T. M., Kumar, R., Weinberg, B. M., & Wing, R. R. (2012). Teammates and social influence affect weight loss outcomes in a team-based weight loss competition. Obesity (Silver Spring, Md.), 20(7), 1413–1418. https://doi.org/10.1038/oby.2012.18

³ Lemstra, M., Bird, Y., Nwankwo, C., Rogers, M., & Moraros, J. (2016). Weight loss intervention adherence and factors promoting adherence: a meta-analysis. Patient Preference and Adherence, 10, 1547–1559. https://doi.org/10.2147/PPA.S103649