How can you tell if someone truly likes you? This question can be confusing, especially when dating. Many people find it challenging to interpret signals from others, often second-guessing messages, laughter, and looks. However, researchers suggest that the answer may lie in our bodies and how they move when we’re near someone we’re attracted to, specifically in a phenomenon called body sway.
Body sway refers to the slight movements our bodies make to maintain balance, even when we appear to be standing still. Our legs, core, joints, and inner ear cooperate to keep us upright, resulting in subtle rocking movements that scientists term “body sway.”

A team from McMaster University’s LIVELab was initially focused on how people synchronize their movements while collaborating on tasks. During their research, they became interested in how attraction might influence these movements. To investigate this, the researchers organized speed-dating events where participants had four-minute interactions. Each person wore motion-capture markers, and infrared cameras monitored their body sway. After the meetings, participants completed surveys about their interest in pursuing a long-term relationship with the person they met.
The findings indicated that couples whose body sway was synchronized showed a stronger desire for long-term connections, rather than just casual encounters. The researchers had accounted for perceived physical and sexual attraction, and the subtle body movements provided insights into a couple’s interest in forming a deeper bond.
Lead researcher Andrew Chang and his team believe that synchronized body movements can reflect effective communication between two people. This synchronization may indicate that their personalities are compatible and that they are interested in each other. It’s akin to a dance that happens naturally, without conscious thought.
However, it’s important to note that this research relies on advanced technology to measure sway, and it should not be interpreted as a definitive guide to someone’s feelings. Sway is just one aspect of nonverbal communication. When two people are in sync, it often demonstrates compatible personalities and good rapport, suggesting they feel safe and understood with each other. This study highlights that connections can go beyond words, as sometimes our bodies recognize a good match before our minds do. What do you think about these findings?
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Source: Upworthy, by Patrick Hamilton