• Multiple sensors can be embedded into the suit for monitoring temperature, heart
rate, posture and movement at the same time
• This opens the door for round-the-clock monitoring to help athletes push their
physical limits as well as for developing good spine posture for people with chronic
back problems
• The sensors are connected via a web of conductive silver threads sewn on the suit,
powered by the NFC wireless signals from any standard smartphone. Because
these sensors are battery-free, the suit is light and easy to maintain
Athletes are always on the lookout for new ways to push thelimits of human performance and one needs to first pinpoint their current limits objectively if they seek to overcome them. A team of researchers from the National University of Singapore (NUS) has developed a smartphone-powered suit capable of providing athletes with physiological data such as their posture, running gait and body temperature while they are out on the field.
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The current technology used to monitor athlete performance range from small wearable fitness
trackers to elaborate clinical monitoring equipment. Fitness trackers are compact and lightweight
but are only able to collect data from a single point which is insufficient to generate meaningful
insights. Clinical monitoring equipment can incorporate multiple sensors to capture data from
various points on the athlete’s body, but are mired in tangles of wires and is too bulky to be used
outdoors. The ideal system would allow researchers to collect data from multiple sensors at
different points on the athlete’s body in an outdoor environment while keeping bulk, weight and
wires to an absolute minimum.
Led by Assistant Professor John Ho, a team from the NUS Institute for Health Innovation and
Technology, designed the pattern of the web-like threads to relay electromagnetic signals from a
nearby smartphone to sensors on the body as far as a metre away, providing power and data
connectivity across the suit. The team took about two years to develop the technology and its research findings were published in Nature Communications earlier this year, where they proved that it was possible to relay a smartphone’s near-field communication (NFC) signal to different locations on the body with specially designed inductive patterns.
“Our smart suit works with most modern smartphones, which act as both the source of power as
well as the display to view the sensor data. The creation of a smart suit that can be powered using
built-in smartphone wireless technology is a major breakthrough,” said Asst Prof John Ho, who is
also from the NUS Department of Electrical and Computer Engineering.
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Smart suit for real-time monitoring
The smart suit is made up of web-like circuitry with the inductive patterns acting as hubs at
strategic locations. Custom-made sensors placed at those hubs can transmit data back to the
smartphone and are powered by the smartphone’s NFC chip, removing the need for batteries.
This reduces a significant amount of weight while enabling the collection of data from multiple
areas on the body.
The current prototype can support up to six sensors per smartphone while collecting information
such as spinal posture, running gait and body temperature simultaneously. Among these
functions, the ability to measure spinal position across multiple nodes is most significant as spinal
posture is an integral part of developing a solid athletic stance which is often overlooked due to
the difficulty in collecting real time data previously. Good athletic stance can help reduce the risk of injury and optimise performance as poor posture is biomechanically inefficient. The smart suit can constantly monitor an athlete’s spinal posture to provide real-time data with minimal impact on their performance as it is wireless and lightweight.
Other potential applications would include clinical diagnosis of spinal disorder and round-the-clock health monitoring. Researchers and doctors can access the data transmitted to the smartphone via a custom-built application which can also alert the user if any potential issues such as overheating occurs during physical activity.
Moving forward, Asst Prof John Ho and his team plan to develop new sensors to increase the range of data collected and hope to work with professional athletes to help them monitor their physiological signals during training.
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