Dan Chao is an avid cyclist who likes to train on a stationary bike. Lately while training he’s been sporting a pair of trendy-looking headphones that also stimulate his brain. And he says the device has helped him improve his performance on his real bike.

Chao is a cofounder and the CEO of a startup called Halo Neuroscience, which released the neurostimulating headphones, called Halo Sport, last month. The arch of the headphones contains two electrodes that deliver a very small amount of electric current to the wearer’s head, aimed at the neurons in the motor cortex, a brain region that coördinates movement.

The mild stimulation, called transcranial direct current stimulation, essentially makes it “slightly easier for the neurons to fire,” says Chao. In principle, that should cause them to form more new connections. Chao says the company’s research data suggests this effect can be used to help athletes get more out of their training.

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