New 'smart' cycling shorts use electric current to enhance muscle performance

British start-up Inpulse to launch new shorts in April

Inpulse shorts

A neuroscience researcher at the University of Southampton has created a pair of ‘smart’ cycling shorts that use electrical sensors and artificial intelligence to improve muscle function.

According to the Times, PhD student Devon Lewis came up with the idea after studying neuromuscular junctions, a connection between the brain and the muscles that sends chemical signals from motor neurons to muscle fibres to make the muscles contract and strengthen.

>>> Which men's WorldTour team has the best kit for 2021? A considered ranking

Sensors in the shorts monitor muscle activity, sending information to an AI tool within the shorts that calculates which muscles need stimulating. And finally electrical impulses are delivered to the muscles via a network of wires in the fabric.

Lewis told the Times: “We have a limited ability to control our muscles naturally. You can control them more precisely and contract them more strongly if you stimulate them directly with electricity.”

Lewis explained that the technology was completely safe with no chance of electric shocks, telling the Times that the electric current felt more like a tingling sensation: “It’s the same thing as when you eat spicy food and you get that little rush. It feels strange when you first start using it but you adapt to it quite quickly.


Inpulse's website shows an app that accompanies the smart shorts

The shorts appear to be accompanied by an app that processes data from the shorts about muscle activation in order to help athletes to identify muscle imbalances and work on remedying them. Lewis previously told University of Southampton that the technology could give “people, from world-class athletes to patients suffering from neurological disorders, the best possible control of their muscles. Many sectors from elite sport, to recreational exercise, to medical rehabilitation, share a common goal: to realise individual potential by improving muscle performance and quality of movement.”

He said: “The problem is that achieving meaningful improvements and realising potential is difficult, time and effort intensive, and often requires specialist intervention, together driving multi-million-pound markets.”

As yet we don’t have any more information other than that the shorts will be launching in April and that they will be shown at the CES technology conference next week.

The Times reports that Lewis is manufacturing the shorts through his start-up Inpulse, and that he plans to adapt the technology for “joggers and people at the gym.”

Cycling Weekly contacted him to ask what further plans in cycling he had for the shorts. Given that the UCI measures riders’ socks with a special ruler to ensure no one gets a competitive advantage through sock height it’s hard to imagine the governing body warming to electric shorts.

Simon Smythe
Simon Smythe

Simon Smythe is Cycling Weekly's senior tech writer and has been in various roles at CW since 2003. His first job was as a sub editor on the magazine following an MA in online journalism (yes, it was just after the dot-com bubble burst).

In his cycling career Simon has mostly focused on time trialling with a national medal, a few open wins and his club's 30-mile record in his palmares. These days he spends a bit more time testing road bikes, or on a tandem doing the school run with his younger son.

What's in the stable? There's a Colnago Master Olympic, a Hotta TT700, an ex-Castorama lo-pro that was ridden in the 1993 Tour de France, a Pinarello Montello, an Independent Fabrication Club Racer, a Shorter fixed winter bike and a renovated Roberts with a modern Campag groupset.

And the vital statistics:

Age: 52
Height: 178cm

Weight: 69kg