Strength Training Cuts Injury Risk by 66%: A Physio's Guide to the Research
Key insights: 60-second read
- Strength training was associated with a 66% lower injury risk - A BJSM systematic review and meta-analysis involving 7,738 participants found a relative risk of 0.338 for sports injuries in the strength-training groups.
- Training volume mattered - A 10% increase in weekly strength-training repetitions was associated with a 4.3 percentage-point reduction in injury risk in the study's dose-response analysis.
- Several mechanisms may contribute - The review identified direct tissue strengthening, improved coordination and control, and gradual tissue conditioning as important prevention mechanisms.
- Strength is only part of the picture - In clinical practice, movement quality, mobility, training load and the way strength is applied also matter when managing injury risk.
An influential study on strength training and injury prevention found that structured strength training was associated with substantially fewer sports injuries. As a physiotherapist, I think the interesting question is not simply whether strength training works, but why it appears to work - and how we can apply the evidence intelligently.
What Did the BJSM Study Actually Find?
The systematic review and meta-analysis by Lauersen et al. (2018) examined six randomised controlled trials involving 7,738 participants. The pooled analysis found a relative risk of 0.338, meaning the strength-training groups experienced roughly one-third the injury risk of the comparison groups.
The findings were consistent across several different injury outcomes, including both acute and overuse sports injuries. However, this does not mean that strength training eliminates injury risk, nor does it establish that strength alone is responsible for every protective effect.
On this page
How Strength Training May Prevent Injuries
The researchers identified three broad mechanisms that may help explain why strength-training programs reduce sports injury risk.
- Direct tissue strengthening: Strength exercises can increase the capacity of muscles and tendons to tolerate force. A stronger tissue may therefore be better able to cope with the loads encountered during sport.
- Improved coordination and control: Some injury-prevention programs use strengthening exercises alongside balance, landing and movement-control training. These approaches may improve how the body coordinates forces during demanding movements.
- Gradual tissue conditioning: Progressive strength training exposes tissues to increasing loads in a controlled way. This allows the musculoskeletal system to adapt before it encounters higher demands during sport.
A Physio's Insight: Strength Is More Than Muscle Size
The practical benefit of strength training is not necessarily about becoming as strong or muscular as possible. It is about gradually increasing the amount of load your muscles, tendons and other tissues can tolerate while also improving your ability to control that load.
The Dose-Response Relationship: How Much Strength Training Is Enough?
One of the most interesting findings was a dose-response relationship. Researchers found that higher strength-training volume and intensity were associated with greater reductions in sports injury risk, while program duration was not statistically significant.
Note: xRM refers to the maximum number of repetitions that can be performed with a given load. An 8RM is a load that can be lifted approximately eight times.
Importantly, the 4.3 percentage-point figure comes from a meta-regression rather than a direct randomised comparison of different training volumes. It should therefore be interpreted as an association rather than a rule that every 10% increase in repetitions will produce the same reduction in injury risk.
The Missing Links: What 20 Years as a Physio Has Taught Me
The evidence for strength training is compelling, but in clinical practice I often see athletes who are already strong yet continue to experience recurring problems. This is where I think the broader picture becomes important.
Strength does not exist in isolation. How effectively you use that strength also depends on movement, mobility, coordination, training load and the way different parts of the body work together.
1. The Domino Effect of Mobility Restrictions
Think of the body as a connected system. When movement is restricted in one area, other parts may have to accommodate that restriction.
- The hip-knee connection: Hip or ankle mobility can influence how the knee moves during tasks such as running, landing and squatting. When an athlete has recurring knee symptoms, examining the joints above and below the knee can therefore be clinically useful.
- The shoulder-thoracic connection: Thoracic spine movement contributes to how the shoulder complex moves. In someone with shoulder pain, looking beyond the shoulder itself can sometimes reveal contributing movement restrictions or coordination problems.
2. The Role of Spinal Function
The spine is an important part of how force and movement are coordinated throughout the body. Problems involving the spine can sometimes contribute to pain, altered movement or reduced muscle performance, particularly when nerve involvement is present.
- Referred pain and inhibition: Spinal structures can contribute to symptoms experienced elsewhere in the body, and nerve-related problems can affect muscle function. This is one reason a broader assessment can be useful when a strengthening program is not producing the expected result.
- The true core: Core function is not simply about performing abdominal exercises. Effective trunk control involves coordination between the diaphragm, abdominal and spinal musculature, pelvis and hips during movement.
A More Complete Injury-Prevention Approach
Strength training has some of the strongest evidence in this particular review, but a sensible injury-prevention program should consider more than strength alone.
STRENGTH
Builds the capacity of muscles and other tissues to tolerate the demands placed on them.
MOBILITY
Allows the body to access the movement required for sport and exercise and may help distribute loads effectively.
COORDINATION
Allows strength to be expressed through controlled, sport-specific movement.
This doesn't mean that every athlete needs a complicated program. In many cases, progressive strength training combined with appropriate sport exposure, recovery and sensible load management provides a strong foundation.
Strengths, Limitations, and Who Can Apply These Results
The results are impressive, but understanding the study's limitations is just as important as understanding its headline findings.
Major Strengths of the Evidence
- Randomised controlled trials: The review included six randomised controlled trials and used a systematic review and meta-analysis approach.
- Consistent findings: The pooled result was robust across the included studies, and the authors reported a high strength of evidence.
- Dose-response analysis: The researchers were able to examine whether training volume, intensity and duration were associated with differences in injury risk.
Important Limitations
- Population: Five of the six included studies involved soccer players. This means the evidence base was concentrated in a particular sporting population rather than being evenly distributed across all sports.
- Different interventions: The strength-training programs varied considerably between studies, so the review does not identify one specific exercise program as the universally optimal approach.
- Association versus causation: The dose-response findings came from meta-regression. They show an association between training volume or intensity and injury risk rather than proving that increasing volume by a particular percentage will produce a predictable reduction in an individual athlete.
- Injury outcomes: The included studies examined different types of sports injuries, so the results should not be interpreted as applying equally to every specific injury or medical condition.
Overall, the findings provide strong support for including progressive strength training in sports injury-prevention programs, particularly in dynamic sports. The exact exercises, loads and frequency should still be adapted to the individual, their sport, training history and current symptoms.
6. Your Action Plan: Applying the Evidence to Your Training
So how can you translate this research into practical training?
- Make strength training a regular part of your week: Consistency matters more than occasional hard sessions. Build strength training into your normal routine rather than treating it as an optional extra.
- Progress gradually: Increase resistance, repetitions or training volume progressively rather than making sudden jumps in workload.
- Train at a meaningful intensity: The research suggests that training intensity matters. Your program should provide enough resistance to create a meaningful training stimulus while remaining appropriate for your experience and goals.
- Consider the whole movement: Don't focus exclusively on the muscle where you feel symptoms. Consider the joints above and below, movement control and the demands of your sport.
- Integrate rather than isolate: Exercises such as a single-leg Romanian deadlift can combine strength, balance, hip control and trunk stability. Isolated exercises still have an important role, but not every exercise needs to train only one thing.
- Prioritise quality and consistency: A program you can perform consistently with appropriate technique and progression is generally more useful than an unnecessarily complicated program you cannot maintain.
I genuinely hope this article offers a fresh perspective - or at least one useful takeaway. If you have a different issue, or simply want to learn more about how your body moves, head over to the Your Wellness Nerd YouTube channel. Subscribe if you feel inclined, and let me know in the comments what you'd like me to cover next.
- Grant
Frequently Asked Questions
How much does strength training reduce injury risk?
In the Lauersen et al. BJSM meta-analysis, strength-training interventions were associated with a relative risk of 0.338 for sports injuries, equivalent to approximately a 66% lower relative risk compared with the control groups. This does not mean strength training eliminates injury risk.
How much strength training is needed for injury prevention?
The study found that greater strength-training volume and intensity were associated with greater injury-risk reduction. However, it did not establish one universal training schedule for everyone. The appropriate amount depends on the athlete, sport, training history and other training demands.
Is strength training alone enough to prevent injuries?
Strength training is an important evidence-supported component of injury prevention, but injury risk is influenced by many factors. Movement control, sport-specific exposure, training load, recovery and individual characteristics can also be relevant.
What were the limitations of the BJSM strength-training meta-analysis?
Five of the six included studies involved soccer players, so the evidence was concentrated in that sporting population. The strength-training programs also differed between studies, and the dose-response findings were based on meta-regression rather than direct randomised comparisons of different training volumes.
One useful insight from this post
Strength training can increase tissue capacity, but injury prevention is broader than strength alone. How that strength is applied through movement, sport exposure and progressive loading also matters.
Reference:
Lauersen, J. B., Andersen, T. E., & Andersen, L. B. (2018). Strength training as superior, dose-dependent and safe prevention of acute and overuse sports injuries: a systematic review, qualitative analysis and meta-analysis. British Journal of Sports Medicine, 52(24), 1557-1563. https://doi.org/10.1136/bjsports-2018-099078
Living With Persistent Pain?
If your pain has lasted longer than expected, feels disproportionate to injury, or hasn't responded to standard treatment, you may benefit from a broader approach. Learn more about our physiotherapy services in Port Macquarie.
Want personalised guidance?
If you'd like help making sense of your aches, pains, or ongoing symptoms, you can book with Grant either in Port Macquarie or via an online telehealth consultation.
The information in this article is for educational purposes and does not replace personalised advice from a qualified healthcare professional.
