Cumulative
G-Force Load.
The total amount of force the brain is exposed to over time — not just from major impacts, but from repeated smaller hits that may seem harmless individually. Over a session, week, or season, these forces add up to become a serious risk.
The Science
It's not always
the big hit.
Research increasingly shows that it's not always the single "big hit" that causes the most damage, but rather the build-up of sub-concussive impacts over days, weeks, or seasons. These repeated forces can gradually alter brain function and structure, even without obvious symptoms.
That's why tracking cumulative G-force and rotational load is so important: it provides a more complete picture of brain stress, helps identify when an athlete may be nearing a dangerous threshold like 600G/week, and enables smarter decisions around rest, recovery, and return to play.
HIT takes a more rigorous approach by monitoring thresholds like 300G over 48 hours — a stricter, smarter early-warning system that provides better short-term protection and supports safer cumulative load management, especially for young or vulnerable athletes.
The Problem
Sport is waking up.
But not fast enough.
While many sports associations are finally taking concussion more seriously, they remain largely silent on cumulative brain load and its impact on long-term health. This gap is especially concerning for children and youth athletes, whose developing brains are more vulnerable to repetitive, sub-concussive impacts that often go undetected.
Elite and recreational athletes alike continue to train and compete under exposure patterns that could be harming them silently, with no structured monitoring or limits in place. Despite mounting evidence that repeated low-level impacts drive neurological decline and increase risk of CTE, dementia, and cognitive dysfunction — current policies fail to address this hidden danger.
"It is the repeated, low-level head impacts — not just big, obvious concussions — that drive neurological decline and increase the risk of long-term conditions."
— Emerging Concussion Research
Why HIT Exists
The device every athlete,
parent & coach needs.
This is exactly why HIT is the device every athlete, parent, and coach should have. Not to discourage participation in sport — but to finally bring clarity and control to something previously invisible.
For the first time in the history of wearable technology, HIT allows users to detect, track, and understand the load their brain is receiving in real time. It takes the guesswork out of recovery by showing how impacts accumulate and decay — empowering users to make informed decisions about when to push forward and when to rest.
In a sporting world where invisible damage has too often gone unnoticed until it's too late, HIT offers something vital: peace of mind through personalised, science-backed insight.
HIT's Approach
Benefits of measuring
your brain's cumulative load.
300G/48hr sets a lighter timeframe, meaning the system is more sensitive to sudden spikes in impact load. It flags risk faster, allowing quicker intervention or rest before cumulative stress builds further.
The 300G/48hr rule spreads the load more safely, reducing intense cluster risks that can occur when multiple heavy sessions fall within a short window.
Symptoms from concussions or sub-concussive hits can take up to 72 hours to appear. A 48-hour cap aligns better with this window, encouraging more cautious management when the brain is still vulnerable.
Our 48-hour threshold supports real-time, responsive decision-making. Rather than waiting for cumulative damage across a week, it offers more granular protection tailored to each user's pattern of impacts.
Benefits of HIT’s approach to measuring your Brain’s Cumulative Load
Shorter monitoring window means earlier detection
300G/48hr sets a lighter timeframe, meaning the system is more sensitive to sudden spikes in impact load. It flags risk faster, allowing quicker intervention or rest before cumulative stress builds further.
Prevents “front-loading” risk
The 300G/48hr rule spreads the load more safely, reducing intense cluster risks.
Matches brain recovery timeframes
Symptoms from concussions or sub-concussive hits can take up to 72 hours to appear. A 48-hour cap aligns better with this window, encouraging more cautious management when the brain is still vulnerable.
Finer-grained data means more personalised management
Our 48-hour threshold supports real-time, responsive decision-making. Rather than waiting for cumulative damage across a week, it offers more granular protection tailored to each user’s pattern of impacts.
