Brain health in sport

The invisible force
that may damage
your brain.

Every impact, jolt, and rapid head movement puts your brain at risk. ACT Head Impact Tracker makes these destructive, often invisible forces visible – measurable, trackable, and actionable – for virtually every sport, every athlete.

ACT Head Impact Tracker is a wearable measuring and tracking device for rapid head movements, acceleration and deceleration, linear and rotational forces, caused by direct and indirect impacts, blows and jolts on a head or torso.

Get the sensor See how it works
A brain formed from sports equipment Made with AI

No medication. No cure.
Prevention is the key.

How it works

Three steps to better
safeguard an athlete’s brain

ACT Head Impact Tracker makes a complex, invisible problem visible, objectively measured, and actionable for coaches, parents, and athletes – and gives valuable insight on real-life events to physiotherapists, sports physicians, and researchers.

01

Measure

The head sensor Pro attaches to a variety of head accessories and gear, capturing every impact, jolt, and force on the head in real time – both linear (g-forces) and angular forces (velocity rad/s and acceleration rad/s²), and more.

02

Track

Data flows instantly from the sensor to the free ACT app, and on to the cloud dashboard. View individual events, cumulative brain load by session, and season-to-date – for one athlete or a whole team.

03

Act

Use the data to make better informed decisions: make interventions to athletes most affected, adjust training intensity, add or remove trainings to support the athlete development towards lower load, identify events that merit review, and validate the measures taken are actually reducing brain load.

Universal by design

One sensor.
All the data.
Every sport.

Unlike competitors locked to specific helmets, features or sports, ACT Head Impact Tracker head sensor Pro attaches to almost any head accessory and gear, and works across virtually all dry-land sports.

With ACT Head Impact Tracker you get access to valuable data about the direct and indirect head impacts. It measures head movement and impacts with linear acceleration, angular speed and acceleration, AUC, and more. COMING SOON: ACT Head Impact Tracker will be the only product combining a wide variety of measurements and movement parameters with new groundbreaking Impact Feature Space (IFS, patent pending) to assess the events more thoroughly than competitive products.

Cumulative effect and exposure of both concussive and subconcussive events may affect athlete brain health and wellbeing significantly in short, medium and long term. Measuring, tracking and managing cumulative exposure and physical brain load is essential. With ACT Head Impact Tracker you can measure and track the cumulative exposure of bigger and smaller direct and indirect impacts on a head, impact and event count in sessions and over time, as well as frequency and proximity of them.

Ice hockeyFootball (soccer)American footballBoxingMartial artsCyclingEquestrianAlpineFigure skatingSynchronized skatingCheerleading

Real-time monitoring for hundreds of users today. Join them, and start the journey towards better, healthier sport.

ACT head sensor Pro worn on a tight-fitting headband
Ice hockey player wearing the sensor with a caged helmet
Sensor attached inside a helmet
Sensor on the back of a Riddell American football helmet
Headband and sensor worn under goggles
Athlete outdoors wearing the sensor
The ACT head sensor Pro on its own

Safety and Warning

Wear the sensor only in a location where impacts or pressure do not occur; if you feel pressure or discomfort, change the location. Runs on a CR2032 coin-cell battery. The sensor is not a household product certified for the USA or Canada. Keep out of reach of children and animals. ACT Head Impact Tracker is a measurement device. It is not a medical device and does not diagnose, prevent, or treat concussion or any other brain injury. In a suspected head injury, remove the athlete from play and seek assessment by a licensed medical professional.

What people say

Trusted by athletes, families,
coaches & professionals

Aurora Liiga
HIFK Stadin Gimmat HPK Ilves Team Kuortane Pelicans Naiset Kärpät Naiset TPS
Ilves Pallokerho Keski-Uusimaa GrIFK FC Honka Pyrintö Cheer Team Knockout Boxing Club
University of Helsinki University of Jyväskylä University of Exeter Aston University Indiana University

and many more athletes in different sports.

For us at Ilves, it is important that we not only follow developments in sports and player safety, but also actively participate in developing better practices ourselves.
Hannu ToivoExecutive Director of the Ice Sports Division of Ilves ry
A clinical assessment is, of course, always necessary, but the app provides valuable additional information, particularly in situations where the forces affecting the head and cervical spine may not have been obvious simply from watching the incident. Following the data and comparing it with what actually happened during games or training has broadened my understanding of the many different ways these forces can affect a player. The clear data provided by the app also makes it much easier to educate players.
Miia LindholmAssistant physiotherapist, HIFK Stadin Gimmat, Aurora Liiga
We should try to prevent the unnecessary injuries and load, which is too often going unnoticed and not taken into consideration. We cannot control each event on the pitch, but when we make events visible, we can ensure they will not go unnoticed, and can act on them.
Toni LindbladAssistant coach, Jyp/Diskos U18
Growing up and learning many new skills like cycling, skiing, snowboarding, scooting, skating and whatnot means tumbling, crashing, falling, even if your kid is not participating in team sports or joing a sports club. Knowing he risks involved makes me want to know what is happening to my son when he is out there.
Heidi KivimaaMom & CEO of ACT Head Impact Tracker
Currently, 3.5 years after my last concussion diagnosis, I still suffer from brain-injury symptoms. I want to speak openly so more people understand what sport concussions can cause. I didn’t have a clue back in the day.
Krister SavonenEx-professional floorball player, brain-injury advocate
When we bring the forces acting on a head into view by objectively measuring them, they can be more effectively addressed and managed – improving the health and wellbeing of athletes.
Sini SkogbergMD, Paediatric neurologist
ACT head sensors and the app are easy to use. The players got used to the sensors very fast and even remembered to put them on – which is great.
Elise HeikkiläSports physiotherapist, Ilves Naiset, Aurora Liiga
I think the ACT Head Impact Tracker is a great device. New tools and improved awareness can help us take great steps forward in athletes’ brain health and safety.
Aidan RafterySports physio, AR Sports Clinic
It is very important to me that impacts and forces to our goalkeepers’ heads are measured and recognised. Even without heading, we get hit by a high-speed ball, and jolts to head and neck are common when we go in front of the ball.
Tinja-Riikka KorpelaElite footballer, goalkeeper
Head injuries in sport are relatively common, yet far harder to recognise and examine than, say, orthopaedic injuries. The energy of the trauma is often unknown, and a concussion can go unnoticed when more visible injuries are present.
Sami NiskanenPhysiotherapist

Get started today

Protect your most
valuable asset.

  • Free to download and use ACT Head Impact Tracker App
  • No monthly fees
  • Works in virtually any sport on a dry land
Buy the sensor · 199,90€ How it works
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