As we reported two posts ago, one of the hits of this
winters Consumer Electronics Show was Reebok’s Checklight, a skullcap with
sensors that can detect head impacts, and lights that light to indicate the
severity of the impact. The Checklight is an important step forward that
deserves more than a single (and occasionally misleading) blog post. In order
to get the full story on the Checklight and its development, we interviewed
Paul Litchfield, the vice president of Reebok Advanced Concepts, and Bob Rich,
the research director at Reebok Advanced Concepts.
Some people would have you believe that one of the worst
things about the internet is that it’s killed long-form reporting. Quite the
opposite is true: One of the beauties of blogs and the internet is that enables
long-form reporting. Paper is expensive; space on a blog isn’t.
Litchfield and Rich’s comments, only slightly edited for
clarity, are reproduced below. They’re the first in a series of interviews
examining the issue of head impacts and young athletes from as many angles as I
can find intelligent people to discuss them.
My bottom line on the Checklight remains unchanged: It’s a
valuable product, well worth its purchase price. But as Rich and Litchfield
note, it’s also a product that requires education, for athletes and
coaches.
So give me the
30-second definition of what the Checklight is.
PAUL: The Checklight is a sport-and-activity head-impact
indicator, intended to inform the user or people around the user of the
magnitude of impact that just occurred. It is designed to be used in
traditional sports, but it is also designed for any activity where the head may
be moving quickly and stops abruptly.
What precipitated
development of the Checklight?
BOB: The whole process started four years ago, when some
members of our team attended a concussion conference. At the conference we
learned a lot about concussions, how they affect people’s health and limit
their ability to participate in sports and activities, and we learned that a
lot of these impacts go unnoticed and undiagnosed. We came back from that
conference thinking that identifying these types of impacts would be a good
first step toward helping athletes.
PAUL: When Bob and Paul Davis
came back from the conference, we didn’t immediately set out to make an
electronic assessment product. Actually, we started out by trying to define
where we wanted to go, and then we set pathways for that. We did begin to look
at a lot of products we could do, from physically assessing impact to actually
diminishing impact. We tried a number of various kinds of impact-mitigation
processes, thinking that we would try to identify the force of the blow. We
examined physical deformation, even something like paint that would shatter and
change color at certain forces. We realized it was a big issue to address, but
we didn’t immediately start to work on an electronic solution.
However, when we looked electronically we saw there were
various ways of assessing impact. Quite frankly, the way your car’s airbag
works is very similar to the way the Checklight works. It very quickly gets an indication
that an impact has occurred, and the airbag inflates as a response. We also
looked at other impact-assessment tools. Riddell has a very complicated system that
fits inside football helmets, and there’s a company called BAE that does a lot
of work in blast assessment in some of the battle theaters out in the world. So
as we found, there certainly are a lot of ways of assessing impact.
How long was the
development process?
BOB: We’ve been working on it about four years. We started Phase
One development four full years ago, and we launched the product on July, 3,
2013, so that’s a full three and a half years spent developing the electronic
head-impact-detection system that evolved into the Checklight.
PAUL: I think it’s interesting that we’ve had lots of projects
that have lasted as long as the Checklight, but none have been as consistently
intense. For Bob Rich and Paul Davis and the rest of the Checklight team, it’s
been a yeoman’s task to get this done. The Checklight project has been running
for four years, and there hasn’t been two days running over those four years
where Checklight has not been a major portion of their workday.
We realized very early on that this is a very important
product, and as we developed this product, we got a sense of all the people out
there who the Checklight could potentially help. It’s great to make people gear
to work out in, but Reebok is committed to being the home of fitness, and
fitness is not just about how many pushups you can do or how many situps you
can do. Fitness is part of a holistic approach to being fit and healthy, and
where the Checklight fits in is that it allows you to keep on participating in
whatever activity you want to. We really wanted to get it right. We wanted to
create a product that could keep key people informed, and diminish some of the
guesswork surrounding what happens when you hit your head.
How was it tested?
BOB: We tested it through mechanical, biomechanical and sensory-evaluation
methods. We have a drop tester in the lab, and we did 15,000 drops using a Hybrid
III head form used in crash-test-dummy tests. In addition, we used a variety of
helmets and nine different head placements, and tested it on multiple surfaces.
We even had Paul Litchfield set up with a headgear and put him in a boxing ring
to see what impacts trigger what lights – and there were plenty of people lined
up to hit Paul Litchfield in the head! (laughs) But we also did wear testing,
seven different rounds in the field with different sports, and athletes ranging
from youth athletes to adults. What we wanted was a device that was sensitive
enough to pick up significant impacts, but not so sensitive that there would be
a line of athletes lining up with the trainer wanting to get back in.
PAUL: Calibration in the lab is one thing. Fifteen thousand
hits result in some pretty strong correlations. But when you get into the
field, people don’t operate as cleanly as they do in the lab environment. As he
said, we did seven rounds of testing, and after each test the evaluation protocol
could take a couple of weeks or it could take a couple of months, because some of
the tests were more supervised and some were more open-platform, where people just
go out and use it and behave more or less typically as they go through their
activities. We were happy that Bob and his team were able to correlate how
people use it in everyday life with how the Checklight behaves in the lab.
BOB: Once we were we out in the field we learned some
things. Certain sports and fitness activities simply have less head contact
than others. Field-hockey, soccer, and basketball players pale in comparison to
football, hockey and lacrosse players. It’s funny, but we learned over the last
four years that many of the innocent hits, hits that don’t look to be as
severe, often result in impairment, while the really big hits, the ones you see
on Sportscenter, don’t result in
impairment. You can’t look at the hit and determine the magnitude of the hit.
Does it work equally
well for all ages?
BOB: We had talked about that early in the development cycle,
that there would be differences in ages and differences in different sports.
What we discovered by looking very closely at an awful lot of research was that
football players on the collegiate level and youth football players exhibit the
same amount of head acceleration and impact. The younger players show sort of a
bobblehead effect; the boys’ head size is very large for their frame, and the
neck strength is not developed. So we determined that because the head acceleration
is the same for youth and college players, we needed to have only one level of
calibration.
PAUL: The Checklight doesn’t measure just peak acceleration
and deceleration. It measures the peaks, but it also captures the time of activation
of the electronic components. We bundle this information together and look at
aggregate signal output. When we do that it shows more of the shape of a curve
and not just a straight-line peak. One more thing – and this is the
super-important part – another thing we did early on is we focused on making
this a very robust system, so not only do we have triangulated accelerometers
to measure linear impact, but we have a gyroscope to measure rotational forces.
It’s those two in combination that work symbiotically to measure and describe
the head impact.
Does it measure the
cumulative effects of multiple hits as well as the effect of a single hit?
PAUL: Probably not. One of things we’ve done is go through
all the research, and this is one of those things that’s not super-clear throughout
the medical industry. When you listen to medical experts there’s a lot of
discussion and debate about whether multiple hits result in injury. That’s one
of the reasons why we have the three lights – green on and functioning, yellow
a moderate hit, red a more
severe hit. If in a finite period of time someone suffers a yellow hit and they
didn’t reset the device and then they coupled that with some more hits the
light could change to red, yes.
BOB: So with a moderate impact the yellow LED lights, and
with a more severe impact the yellow changes to red. We scoured medical
literature and we couldn’t find any evidence that five yellows equal one red,
or anything like that.
PAUL: Now this is super-important: These impacts, this
amount of physical contact, is happening anyway as you participate in these
physical activities. What the Checklight does is attach information to these
impacts. We do have a yellow light that lights when a moderate amount of head
contact occurs, and a red light that goes off when you suffer a big-time hit.
When either yellow or red LEDs trigger, we are telling athletes, please get
checked out. To Bob’s point, some of the
more benign, low-impact hits to the head absorb energy and result in a yellow
light. We implore people that when the Checklight triggers yellow or red to get
yourself checked out, either formally with trainers or informally with family
or coaches. Please get checked out; don’t ignore it.
What applications do
you see for the Checklight?
PAUL: I can say very enthusiastically we’ve used it in
everything, from boxing and mixed martial arts and hockey – we play hockey –
and then all kinds of sports and activities: equestrian activities, horse
jumping – we put it on the rider, not the horse [laughs] – downhill skiing. Motocross
is extremely excited about it. Traditional team sports are using it. We’re very
proud of the skullcap, but we’re also just moments away from announcing a
headband version for unhelmeted activities that will still have the same functionality.
We can see people using it anytime they participate in an active lifestyle
activity where there’s a potential of them hitting their head.
BOB: One thing we haven’t discussed and I think needs to be
noted is that the Checklight also counts impacts as well. There’s been more and more medical and
scientific information on cumulative effects of impacts over time. The Sports Legacy
Institute has come up with something called the hit count that’s like a pitch
count in baseball. It provides guidelines on the number of head impacts that an
athlete should receive. Checklight
counts the number of impacts over time and you can determine impact count whenever
you want, the end of the day, a week, whatever. Parents can check the number of
hits and reset it to zero whenever they want. This is a very important feature.
You know, the pitch count was never based on science; it was just a guideline.
You see so many coaches with counters in their hand, and when a pitcher gets to
a certain number of pitches they’re coming to remove him from the game. Now we
just drop off a kid at football practice and say, “Go ahead; hit your head as
many times as you want.” Hit count is something we saw coming, and built into
the device right from the beginning.
Since a Checklight
doesn’t diagnose a concussion, how do you foresee coaches using it?
BOB: If a coach sees a big hit or impaired player and doesn’t
respond, whether the player is wearing a Checklight or not, he’s probably not
going to respond any time he sees an impaired player or big hit. If doesn’t see
and doesn’t respond, he’ll say he didn’t see it. The Checklight is like having
an extra set of eyes out there. As you progress down the levels in athletics, fewer
and fewer people are watching kids play youth sports. I’m a youth lacrosse
coach, and I sometimes I have 20 kids out there. I really need an extra set of
eyes to get youth on the pathway to assessment.
PAUL: In the inside of the Checklight box is a card, a
simple card about the size of a business card that explains what it is not. It
is not a legal obligation, but it describes what the green, yellow, and red
light means, and that you should get the participant athlete checked out. It’s pretty benign, as
opposed to being very formal.
BOB: There are so many different concussion-diagnosis tools out
there. Whatever individual tool the coach, team, or league is using, and
whatever their best practices are for assessing an impaired player, trying to
ID those players and get them into their systems, then we want to work with
those best practices.
Have you shown this
to any leagues, organizations, and/or sanctioning bodies? What has been their
reaction?
PAUL: We’ve shown it around to both major youth football
leagues, a number of hockey leagues, as well as lacrosse leagues. They’re
super-interested and very keen on supporting it. We’re currently working out the
logistics of how implementation could occur, whether it could be a mandated
part of standard equipment or voluntary. These organizations just need to be enlightened
about this, and have a conversation about this. They need to be convinced about
another piece of equipment that measures the magnitude of a hit. It’s just
completely new.
Do you think the
Checklight or something like it should be mandated?
PAUL: Yeah, I do, in the regard that it helps. It’s almost
like wearing a mouthguard. It’s a piece of equipment that helps to inform people
about what has just happened. You know, we kinda used to have this notion of when
someone got their bell rung, you shake off the cobwebs and go back in. Now we
know that it’s not probably the most intelligent and coolest thing to do. So I
think it should be mandated. It can be very, very helpful. It can’t be helpful
if it isn’t used.
BOB: We joined forces with CSMI, which essentially is an
electronic-medical-recordkeeping company for the athletic training industry, colleges
and high schools. They happen to be located in same town as us, and they have a
lot of people from MIT. They’ve been at this for 20 years or so, and they have
a database of about 1 million athletes and 2 million injuries. An athletic
trainer can use the CSMI database on a mobile device right there on the field
to access a player record that contains contact information, medical history,
and more. What we've done with CSMI is incorporate CSMI into our software, so
we can add epidemiological evidence of a yellow light or a red light into that
database, so we can answer the question of when a yellow light or red light
goes off, what is the outcome. This is very powerful information, and it’s the
sort of information we can get from the Checklight.
What do you foresee
for the Checklight five years down the road?
PAUL: Five years down the road I see the Checklight as a
device that not only informs but helps instruct. I’ve seen it anecdotally any
number of times; I even saw it when we were testing early on in some high-end
Boston-area boxing gyms, places where you can get a lot of data quickly when
you’re testing on human subjects. People very quickly came to understand that
if they lead with their head the device goes off and you could potentially be
at risk; at the very least, you need to get assessed. But if you don’t lead
with your head and just play the game with the rest of your body parts as you
should, you can play equally intensely, and play effectively, and the lights
don’t go off.
BOB: There was a 7th-grade football team in the Boston
area where every player got a Checklight and wore it for every practice and
game the entire year. The kids knew they would be coming out to be assessed if
the Checklight went off, so they modified their blocking and tackling technique
so it didn’t go off. Everyone wants to play; no one wants to go off. So five
years down the road, I see coaches using this as a biofeedback tool to teach
proper techniques as well as a safety device.
It’s not like another pair of sneakers. Everyone knows what
they do, how they work, what body part they
go on. This is a new product. This is a completely new arena for us, where
we’re introducing this product. This is more instructional than a pair of shoes.
PAUL: There’s been a lot of media coverage; people are very
aware of head impacts. It’s not that oblique; they understand the concept of
head impact, and they understand the concept of an indicator that shows head
impacts. However, the adoption rate has been very slow, and there’s something I
can equate it to. We saw with downhill skiing, five years ago only ski racers
were wearing ski helmets. Then, a couple
of years later, because of parents’ concerns, most kids were wearing helmets.
Now, last year, 85 percent of the people on the slopes were wearing ski
helmets. And that’s just one example. The product is there, and as people get
more and more aware of it, it becomes more popular. Something like this doesn’t
diminish the experience; it just makes you feel less at risk. As more people
see it, they’ll understand it’s not
meant to keep people off the field or diminish an active lifestyle. It’s just
something to keep yourself informed. It’s similar to what we saw when people
started wearing seatbelts or bike helmets. It takes time to adopt to a new way
of doing things. Eventually the majority of people do adopt it.
Have you detected any
hesitancy on the part of any league or sport official you’ve spoken with to see
this data, and understand the scope of severe head contact within their
organization?
PAUL: Absolutely, out of some trepidation of what it’s going
to do to the quality of the game, and whether it’s going to put us as risk. For
those who have listened to the message and those who have tried it, the
transition from skeptic to crusader has been awesome to see. People have been
skeptical. Honestly, it’s not been the be-all or end-all. It’s a first step,
and it’s a really good first step. Overall, it’s been a positive experience,
and for some of the coaches we’ve showed this to, their reaction has been
really gratifying to see. They see it’s effective, they see it’s useful, and
they see this is a device that just can help.