What the Science Says
A comprehensive meta-analysis that reviewed 71 different randomised trials has delivered a verdict that may surprise many. The review, published in Nature Human Behaviour, looked at data from over 22,000 participants. When it came to purely functional
outcomes—like gains in strength, improvements in aerobic capacity, and increased flexibility—researchers found no significant difference between exercising in a group versus working out alone. This means that if your primary goal is to get physically fitter, the format of your workout might matter less than you think. A person exercising consistently with a structured program at home is not missing out on major physical gains by skipping the group class. The key takeaway from the massive body of evidence is that consistency and quality of effort are what drive physical results, regardless of the setting.
The Undeniable Power of the Group
While the physical benefits may be similar, that doesn't mean group exercise has no edge. The same large-scale review noted that group settings showed a small but consistent advantage for psychosocial outcomes, such as wellbeing and social connection. Other studies reinforce this, finding that exercising with others can lead to greater stress reduction and improved emotional quality of life. The social aspect provides accountability; you're more likely to show up if you know people are expecting you. This shared experience, encouragement from an instructor, and sense of community can be powerful motivators, especially for beginners or those who find it hard to stick with a routine. The feeling of being part of a team can make the effort more enjoyable and foster long-term adherence.
The Quiet Strength of Going Solo
For every person who thrives on the energy of a group, there's another who finds focus and peace in solitude. Solo workouts offer unparalleled flexibility. You can exercise whenever and wherever you want, without being tied to a class schedule. This format allows for complete personalization—you control the pace, the intensity, and the specific exercises to meet your unique goals. For many, a solo run or gym session is a form of moving meditation, an opportunity to clear the head and reduce stress without the pressure of social interaction. Interestingly, some research shows that solo exercisers sometimes work out for longer durations than their group-class counterparts. The advancement of fitness apps, wearables, and online coaching has also made solo exercise more structured and effective than ever before.
So, What Is the 'Best' Workout?
The research ultimately points to a reassuring conclusion: there is no single 'best' way to exercise for everyone. The debate between group and solo workouts is less about which one is superior and more about which one is superior for you. If you're driven by social connection and find motivation in a shared struggle, group classes are an excellent choice. If you value flexibility, have very specific training goals, or see exercise as personal time, a solo routine will serve you just as well for physical fitness. Some studies even find no significant difference in motivation between partnered and individual training over time, suggesting that personality and other internal factors play a huge role. The most effective workout plan is the one you will consistently follow, and enjoyment is a key predictor of consistency.
