Rowing with your partner could be the secret to a lasting relationship, scientists have found – as long as you make up afterwards.

Couples who argue openly then resolve their differences grow closer over time, according to researchers who tracked brain activity during disagreements.

When a listener stayed calm while their partner expressed frustration, the partner's anxiety fell almost immediately – evidence that one person's composure can regulate the other's distress directly.

The researchers said this is because 'synchronised partners better understand each other's emotional states and respond appropriately, enhancing connection while reducing misunderstandings and conflict'.

They found that when one person keeps their cool – taking a moment to think before reacting – it can stop a difference in perspective spiralling into a heated argument.

But if couples avoid conflict altogether, they may miss out on the feeling of togetherness that comes from resolving an argument, according to the research published in the Acta Psychologica journal.

Over time, these patterns matter. The idea is that arguing, done well, will help couples reach solutions more quickly, resulting in higher levels of relationship satisfaction.

This process 'allows them to resolve conflict more effectively, maintaining harmony and stability', rather than suffering in silence where resentment can grow.

However, it's not about telling your partner what you think they want to hear, the researchers added.

Behaviours like taking a partner's perspective were not strongly linked to how satisfied couples felt in this context.

Rather the crucial factor was much more immediate: whether partners could control their emotions in the heat of the moment.

The team at Anhui University in China monitored couples during conversations designed to provoke conflict, measuring how closely their brain patterns aligned in real time.

They concluded relationships work less like two perfectly matching minds – where disagreements never arise – and more like a live system where partners constantly influence each other's emotions.

This process, they suggest, 'enhances adaptability and satisfaction', increasing the likelihood of couples staying together for the long run.