New research has found that applying physical force on one’s breasts can prevent malignant cancer cells.

Researchers at the University of California Berkeley and the Lawrence Berkeley National Laboratory presented their findings Monday at the Society for Cell Biology in San Francisco.

“People have known for centuries that physical force can influence our bodies,” research team member Gautham Venugopalan said in a statement. “When we lift weights, our muscles get bigger. The force of gravity is essential to keeping our bones strong. Here we show that physical force can play a role in the growth — and reversion — of cancer cells.”

Squeezing breasts can help guide cells back into a normal growth pattern, stopping the “out-of-control” growth of malignant cancer cells.