The single most effective way to prevent CTE in football is to reduce the total number of hits to the head, not just concussions. Research from Boston University has established that subconcussive impacts, the routine collisions that happen on every play and never produce visible symptoms, are causally linked to the brain changes behind CTE. That distinction matters because it shifts prevention from “avoid big hits” to “reduce all hits.”
Why Total Hits Matter More Than Concussions
For years, concussions got most of the attention. But lab and autopsy studies now show no correlation between concussive signs at the time of injury and CTE brain pathology. Instead, early indicators of CTE not only persisted long after injury but spread through the brain over time. The takeaway from Boston University’s research team was blunt: to prevent the disease, you have to prevent head impact.
This is especially important for linemen. A study tracking high school football players found the average player sustains about 652 head impacts per 14-week season. Linemen absorb the most, averaging 868 impacts per season, with roughly 11 hits per practice and 29 per game. Receivers, cornerbacks, and safeties absorb the fewest at around 372 per season. Every one of those sub-threshold hits contributes to the cumulative burden that drives CTE risk, which means prevention has to target volume across an entire career, not just the big collisions that make highlight reels.
Delay Tackle Football for Kids
The Concussion and CTE Foundation recommends delaying tackle football until at least age 14. Their reasoning is straightforward: a child who starts tackle football at age five may have 10 times the odds of developing CTE compared to one who starts at 14. Those extra years of repetitive head impact accumulate during a period when the brain is still developing and potentially more vulnerable.
Flag football provides the same skill development, team experience, and love of the game without purposeful repetitive head contact. Until tackle football is proven safe for developing brains, flag football is the clearest risk-reduction step a parent can take.
Limit Full-Contact Practices
Most head impacts in football happen during practice, simply because players practice far more often than they play games. Cutting full-contact practice sessions is one of the most direct ways to lower a player’s seasonal hit count. The Ivy League adopted guidelines limiting teams to no more than two full-contact practices per week, well below the NCAA maximum of five. Spring practices were capped at seven full-contact sessions total.
Princeton’s head coach noted that two full-contact practices per week still allow enough time to teach proper tackling technique while significantly reducing repetitive hits. Youth and high school programs can apply the same principle: structure more practices around drills that don’t involve live tackling. Walk-throughs, film study, positional footwork, and controlled tempo drills all build football skills without adding to the impact count.
Choose the Right Helmet
Not all helmets perform equally. Virginia Tech’s helmet rating program has tested 38 varsity football helmets for their ability to reduce both linear and rotational head acceleration. The top-rated models in their current rankings are the LIGHT Apache, VICIS Zero2 Trench, Xenith Orbit PRO, LIGHT Gladiator ATK, and VICIS Zero2, all earning five-star ratings. A lower score in their system means better protection, and there’s a meaningful performance gap between the best and worst helmets on the market.
Padded helmet covers add another layer. The Guardian Cap, a soft-shell cover worn over the helmet, has shown substantial results. After the NFL required certain positions to wear Guardian Caps during preseason practices, concussion rates among those players dropped 54% to 62%. That’s a significant reduction from a relatively simple addition. If your league or team allows them, they’re worth using, particularly for linemen and other high-contact positions that absorb the most hits per session.
Teach Heads-Up Tackling Technique
Proper tackling technique reduces head involvement in collisions. Programs like USA Football’s “Heads Up” initiative teach players to keep their head up and to the side during tackles, driving with the shoulder rather than leading with the crown of the helmet. The goal is to take the head out of the tackle entirely.
Some programs have looked to rugby-style tackling as a model, since rugby players tackle without helmets and learn to protect their heads by default. However, it’s worth noting that rugby’s overall injury rates are actually higher than football’s, and concussion rates in rugby are roughly 2.5 times those in collegiate football. The technique principles are sound (shoulder contact, head placement, wrapping up), but simply copying rugby tackling doesn’t automatically make football safer. The value is in the specific mechanics that reduce head-first contact, not in the sport itself.
Position-Specific Protection
Because hit exposure varies so dramatically by position, prevention strategies should too. Linemen sustain more than twice as many impacts per season as receivers and defensive backs. In games, linemen average about 29 impacts per session compared to roughly 16 for the receiver and defensive back group. This means linemen benefit most from padded helmet covers, limited contact in practice, and drills that teach hand technique over head-to-head engagement.
Coaches can also rotate players during contact drills rather than having starters take every rep. Monitoring snap counts and practice participation helps ensure no single player is absorbing a disproportionate share of the week’s impacts. Some college and professional programs now use accelerometers in helmets to track cumulative hit loads, giving coaches real data to manage exposure the way pitch counts are managed in baseball.
Nutrition and Brain Resilience
Omega-3 fatty acids, specifically DHA and EPA found in fish oil, are being studied for their potential to reduce brain inflammation and support recovery after head impacts. Current clinical trials are testing daily supplementation of about 1.5 grams of combined EPA and DHA in athletes. The theory is that omega-3s may help reduce the inflammatory cascade and oxidative stress that follow brain impacts, potentially supporting neural repair and cognitive function.
This research is still in progress, and omega-3s should not be treated as a substitute for reducing hits. But ensuring adequate omega-3 intake through fatty fish or supplements is a low-risk nutritional step that supports overall brain health regardless of the final trial results.
Blood Tests for Brain Injury Detection
One challenge in preventing CTE is that subconcussive damage is invisible in the moment. Blood-based biomarkers are changing that. The Banyan Brain Trauma Indicator became the first FDA-approved blood test for traumatic brain injury in 2018. It measures two proteins released when brain cells are damaged: one from the brain’s support cells and one from neurons themselves. Together, they provide a snapshot of whether the brain has sustained structural injury, even when a player “feels fine.”
Another promising marker, neurofilament light chain, is considered the best available long-term indicator of the type of nerve fiber damage that accumulates over a career. These tools aren’t yet standard on sidelines, and protocols for when and how often to test athletes still need to be standardized. But they represent a shift toward objective measurement of brain damage rather than relying solely on symptom reports, which players frequently understate.
What Actually Works: A Priority List
- Reduce total head impacts. This is the foundation. Every other strategy supports this goal.
- Delay tackle football until 14. Flag football builds the same skills without the cumulative brain trauma.
- Cap contact practices. Two full-contact sessions per week is a proven, workable limit.
- Use top-rated helmets and padded covers. Equipment can’t eliminate risk, but the best helmets paired with Guardian Caps meaningfully reduce impact forces.
- Teach shoulder-first tackling. Remove the head from the point of contact through technique, not just rules.
- Monitor hit exposure by position. Linemen need the most protection and the most practice restrictions.
CTE prevention in football isn’t about any single change. It’s about layering these strategies so that each player’s lifetime exposure to head impacts stays as low as possible while still playing the game.