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ACT Head Impact Tracker.
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ACT Head Impact Tracker head sensors
ACT Head Impact Tracker head sensor is an integral part of ACT Head Impact Tracker, it is what measures forces acting on your head. There are two types of head sensors:
1. ACT Head Impact Tracker head sensor measures number, frequency and proximity of impacts and forces acting on a head. Magnitude measure is g-force (linear acceleration/deceleration) and Impact g-load (accumulation of g-forces).
2. ACT Head Impact Tracker head sensor Pro measures number, frequency and proximity of events when head rapidly moves. Magnitude measures are g-force (linear acceleration/deceleration), Impact g-load, (accumulation of g-forces), angular acceleration (rad/s2), angular velocity (rad/s) and accumulation of angular acceleration and velocity.
ACT Head Impact Tracker smartphone mobile App
ACT Head Impact Tracker smartphone mobile App is required to operate ACT Head Impact Tracker head sensor and ACT Head Impact Tracker head sensor Pro, and to communicate with the Cloud. With the App you can create and manage User Account(s) and Profile(s), add an ACT Head Impact Tracker sensor(s) on your Profile(s) and operate it, view and receive information on the events, and share your Profile(s) Impact information with other Users. Use App for tracking the events on the sidelines!
ACT Head Impact Tracker Browser Access
You can access your user account, get all the data collected, Build and manage Teams in Team Dashboard, establish seasons and sessions in Team Dashboard (it can also be used in individual sports!) and much more in ACT Head Impact Tracker Browser Access. There are two levels in Browser Access: Web User Interface and Team Dashboard. Access your user account and data when ever you need, on any device via browser access in https://dashboard.act-tracker.com/
Use Browser Access for data crunching!
Web User Interface
In Web User Interface, you get lots of detailed data and measurements in numerical format and as graphical illustrations. There is much more of everything than what is featuring in the App: data, features and actions. You can for example mark false positive events (like those occurred in transportation, handling and other) as faulty impacts, and add notes to events. Browse the data with your smartphone, tablet or computer, and use Export tool to import your impact data to most common spreadsheets (such as Excel or Numbers) in Web User Interface.
Team Dashboard
Team Dashboard is statistics and light analytics tool for coaches, trainers, teams and clubs. Its Beta1 pilot test version is now out for all our users to test use. Activate and use Team Dashboard to track and get statistics and light analytics on both team’s and individual athletes’ total (cumulative) events data per session and season to date. Create a team (can also be use for individual athletes!) > add athletes to the team > create a season > add sessions to monitor team’s and individual athletes’ physical brain load and athletes’ comparisons on number of events, highest g-force and rad/s2 magnitudes measured. Utilising Quick start Sessions in Team Dashboard will help you to eliminate the false positives from before and after the practises and games and those from the breaks and half times in the games. This will greatly improve the accuracy of the brain load measurement.
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What people say
What is the measurement data and what does it tell you?
Rule of thumb: the larger the magnitude, the bigger the chance damage occurs.
g-force, linear acceleration/deceleration
Regarding individual and infrequent events, in many studies acceleration/deceleration under 40g have been considered likely not to cause permanent damage, but it can be extrapolated that the probability of permanent damage starts to increase in impacts within the range of 40-60g and higher. Some research studies on adult male athletes have suggested that exceeding 70-100g or more, is associated with an increased risk of concussion. Other studies that adult women the concussive threshold could be around 55g.
It is critical to note, that these thresholds are not universally agreed upon within the medical and scientific communities and concussive thresholds can vary depending on multiple factors (such as age, gender, impact history, brain injury history, and many more). These thresholds mentioned above should not be used as general guidance.
Rad/s2 and rad/s, angular acceleration and velocity
(only in ACT Head Impact Tracker head sensor Pro)
In the context of brain traumas, rad/s2 and rad/s can be used to quantify the rotational forces experienced by the brain during an injury event. Rotational motion can lead to diffuse axonal injury, which is a common type of injury associated with brain trauma. At the moment there is no specific universally accepted threshold of rad/s that could definitively diagnose a concussion, or permanent brain damage.
Impact g-load (not available in Android App)
The relationship between the magnitude and duration of linear acceleration/deceleration and the risk of sustaining a concussion is one part of a complex picture. The biomechanics of brain injury are multifaceted. At the moment there is no specific universally accepted threshold of Impact g-load (AUC) that could definitively diagnose a concussion, or permanent brain damage.
WARNING! The above thresholds are not to be used as general guidance. Precautionary principle should
apply. Brain injuries can result from a combination of forces and factors, including linear and angular forces,
duration of the impact and many more. Threshold foran injury vary significantly among individuals.
IF YOU ATTACH SENSOR TO THE HELMET, please notice that sensor measures what it is attached to. The forces measured from the helmet are very likely higher than those acting on your head inside the helmet. How much higher depends on multiple factors like helmet type, the fit of your helmet, how old your helmet is, and which part of the helmet the forces act on. If you have 2 sensors at your disposal, you can approximate the conversion rate for the helmet you are using by attaching one sensor on the head with a headband and one in the helmet and wear it like that for few practices. Compare the data collected by the sensors, divide the helmet measurement with that of measurement on a head in each impact and calculate the a very approximated conversion rate.
(only in ACT Head Impact Tracker head sensor Pro) In the context of brain traumas, rad/s2 and rad/s can be used to quantify the rotational forces experienced by the brain during an injury event. Rotational motion can lead to diffuse axonal injury, which is a common type of injury associated with brain trauma. At the moment there is no specific universally accepted threshold of rad/s that could definitively diagnose a concussion, or permanent brain damage.
Impact g-load (not available in Android App)
The relationship between the magnitude and duration of linear acceleration/deceleration and the risk of sustaining a concussion is one part of a complex picture. The biomechanics of brain injury are multifaceted. At the moment there is no specific universally accepted threshold of Impact g-load (AUC) that could definitively diagnose a concussion, or permanent brain damage.
WARNING! The above thresholds are not to be used as general guidance. Precautionary principle should apply. Brain injuries can result from a combination of forces and factors, including linear and angular forces, duration of the impact and many more. Threshold foran injury vary significantly among individuals.
Rule of thumb: the higher the number of events when impacts and forces act on a head, the bigger the chance the damage occurs.
Repeated events on a head, even those low in magnitude and in the absence of diagnosed concussions (so-called subconcussive events), may lead to subtle and cumulative brain changes, brain diseases and injuries. Such changes may include alterations in brain structure and function, and the accumulation of abnormal protein deposits like tau, which is associated with neurodegenerative diseases. Repeated events on a head may also lead to subtle cognitive changes that can affect attention, memory, and other cognitive functions, and they may not become apparent until later in life.
Rule of thumb: the more frequent and closer in proximity, the bigger the chance the damage occurs.
Frequency of events when head rapidly moves is a significant factor in assessing the risk of brain injuries and diseases. Cumulative exposure to events, both concussive and subconcussive events, can have long-term consequences on brain health. Reducing the frequency of events and implementing protective measures are important steps in mitigating these risks. Long-term monitoring of individuals who are at risk of frequent events, such as athletes or individuals in high-risk professions, is essential. In contact sports, athletes may experience multiple events in close proximity during a single game or practice session. This close succession of events can contribute to the overall risk of brain injury.