IEEE Spectrum June, 2015 - 44
Part 1: Reading the Code
sPorts
The Quantified
Olympian
B i o m e t r i c g a d g e t s are transforming the way the
world's elite athletes are trained. These wearable sensors provide on-the-go physiological measurements, which previously
required bulky and costly lab equipment. Just as weight-training
regimens became popular 40 years ago to build more resilient athletes, wearables are now helping players both improve
performance and ward off injury. * "I definitely see them as
becoming part of everyday training," says Marko Yrjovuori, a
biomechanics specialist who trains the Los Angeles Lakers
basketball team. Here are some state-of-the-art systems
that are changing the game for elite athletes, including a few
within reach of dedicated amateurs. -Emily Waltz
Readiband
What it is: This electronic wristband measures
sleep quality and quantity, which can help
predict a player's reaction time for the next
day. Coaches can use an associated online tool
to monitor the sleep patterns and fatigue of
professional athletes.
hoW it Works: The band's accelerometer
senses tiny movements of the wearer's wrist,
which reveal whether the wearer is asleep or
awake. To predict fatigue, the results are fed
through the SAFTE (Sleep, Activity, Fatigue,
Task, and Effectiveness) model, which was
developed by the U.S. Army. An "effectiveness
score" rates the quality of the wearer's slumber.
Who's using it: Vancouver Canucks, Seattle
Sounders, and Dallas Mavericks
Price: US $22,800 per year for 20 Readibands,
including analytics software (individual wristbands are not sold)
Motus sleeve
What it is: A compression sleeve with sensors
tracks a baseball player's throwing motions.
Pitchers who use the sleeves to correct their
technique may be able to prevent ulnar
collateral ligament (UCL) injuries, which have
resulted in an epidemic of reconstructive
procedures known as Tommy John surgeries.
Previously, quantifying ballplayers' throwing
motions required motion-capture imaging.
hoW it Works: The sleeve tracks arm movements with accelerometers and gyroscopes
and sends data via Bluetooth to a smartphone.
Based on an estimate of the player's arm
motions and basic biomechanical principles,
the Motus app calculates elbow torque-the
stress a pitcher puts on his UCL. It also tracks
metrics such as arm speed, maximum shoulder
rotation, and elbow height at ball release.
Who's using it: Pitchers with more than two
dozen professional baseball teams during
spring training this year
Price: US $150
illustrations by
Bryan Christie Design
Table of Contents for the Digital Edition of IEEE Spectrum June, 2015
IEEE Spectrum June, 2015 - Cover1
IEEE Spectrum June, 2015 - Cover2
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IEEE Spectrum June, 2015 - Cover3
IEEE Spectrum June, 2015 - Cover4
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