Why Injuries Often Happen at End Range (And Why Strength There Matters)
Most injuries don’t happen in the middle of movement
When people think about strength training or injury prevention, they often focus on how much weight they can lift or how strong they feel during the “easier” parts of a movement.
But research and clinical experience consistently show something important:
👉 Many injuries occur when joints are forced into positions where they have mobility but not control — also known as end range strength.
This is the position where your body has the least mechanical advantage and often the least neuromuscular control. If your body can reach a position but cannot control or produce force there, your injury risk rises significantly.
What is “End Range Strength”?
End range refers to the outer limits of a joint’s available motion.
Examples include:
The deepest position of a squat
The bottom of a pull up
Full shoulder overhead or behind-the-head positions
Terminal knee extension or deep knee bend
End-range ankle dorsiflexion
End-range strength means your body can:
Maintain joint stability
Produce and absorb force
Coordinate muscular control
Maintain tissue tolerance
…all while in these vulnerable positions. Easier said than done!!
Why Lack of End Range Strength Can Increase Injury Risk
1. Mobility Without Strength Creates Instability
Many people focus heavily on flexibility or mobility work. While mobility is important, and we are pro mobility, research suggests that mobility alone does not reduce injury risk unless it is paired with strength and control.
A 2020 review published in Sports Medicine showed that strength training across full ranges of motion improves both performance and tissue resilience compared to partial-range training.
When someone gains range without building strength there, the nervous system often protects the joint by:
Creating compensations
Increasing muscle guarding
Shifting stress to other tissues
Over time, this can lead to overload injuries. This is one reason why we always like to pair a mobility drill with a stability drill. You can more range of motion with the mobility drill, now strengthen into that new range.
2. Tissues Must Be Prepared to Absorb Force
Tendons, ligaments, and muscles adapt specifically to the loads placed on them. Studies on tendon adaptation show that progressive loading improves tendon stiffness and energy absorption capacity — both key for injury prevention.
If tissues are not exposed to load near end range, they are less prepared when sport or life forces the joint into that position unexpectedly.
This is commonly seen in:
Hamstring strains during sprinting
Achilles injuries during landing or change of direction
Shoulder injuries in overhead athletes
Knee pain during deep squatting or deceleration tasks
3. Fatigue Exposes Weak End Ranges
In sport and training environments — especially high-intensity settings like CrossFit, running, cycling, or skiing — fatigue reduces coordination and motor control.
Research in neuromuscular fatigue shows that as athletes fatigue:
Joint control decreases
Movement variability increases
Compensations increase
Load shifts toward passive structures
If an athlete lacks strength at end range, fatigue often reveals it quickly.
This is a reason behind why nagging injuries often appear during periods of increased training intensity or volume.
End Range Strength Improves Both Performance AND Durability
Training strength at longer muscle lengths and deeper joint angles has been shown to:
✔ Improve force production
✔ Improve movement efficiency
✔ Increase tissue resilience
✔ Reduce recurrence of certain injuries
✔ Improve mobility retention
For example:
Studies on eccentric and long-length strength training show reduced hamstring injury rates.
Full-depth strength training improves squat and jump performance.
Shoulder stability training in end ranges improves overhead performance and reduces pain in throwing and lifting athletes.
What could this look like clinically?
Feeling strong with squatting, but trouble “getting out of the hole”
Recurrent “tightness” that occurs despite stretching
Poor control during transitions (lowering into movements or absorbing force)
It’s not as simple as lacking mobility, many times it’s a lack of strength within the available mobility ranges.
How do you build end range strength?
The key is progressive, intentional loading, not forcing positions.
Examples include:
Tempo strength training
Isometric holds in end range positions (for example, the bottom of a pull up)
Controlled eccentrics
Partial range progressions into deeper ranges
Stability training that improves joint awareness
When programmed properly, these methods help joints tolerate load rather than avoid it!
When to seek help?
You might benefit from an evaluation if you notice:
Recurring injuries in the same area
Loss of confidence at deeper positions
Mobility that doesn’t “stick”
Pain during high intensity or fatigue
Strength plateaus despite consistent training
A movement and strength assessment can help identify where your body lacks control and guide targeted training strategies / a program to help.
Research References
Schoenfeld BJ, Grgic J. Effects of Range of Motion on Muscle Development During Resistance Training Interventions: A Systematic Review. Sports Medicine. 2020.
Hughes LJ, Ellefsen S, Baar K. Adaptations to Endurance and Strength Training at Long Muscle Lengths. Scandinavian Journal of Medicine & Science in Sports. 2019.
Bohm S, Mersmann F, Arampatzis A. Human Tendon Adaptation in Response to Mechanical Loading. Journal of Applied Physiology. 2015.