Strength training is one of the most important—yet often underestimated—factors in improving running performance. For many years, it was considered secondary to endurance training. However, modern scientific literature has highlighted its decisive role in enhancing running economy and neuromuscular function.
Strength training does not aim solely at increasing or maintaining muscle mass, but primarily at improving the nervous system’s ability to activate muscle fibers efficiently. Through this adaptation, better coordination and greater efficiency in force production during movement are achieved.
Beyond these physiological adaptations, strength training is also an important tool for identifying and correcting functional imbalances. Through targeted exercises, asymmetries can be detected and improved—either between the two sides of the body or among muscle groups that work together during movement. When left unaddressed, these imbalances can lead, in the medium or long term, to increased mechanical stress and represent one of the main predisposing factors for injury.
Therefore, strength training functions not only as a means of performance enhancement but also as a strategic tool for injury prevention, contributing to stability, movement control, and optimization of running mechanics.
Key physiological adaptations associated with strength training include:
- improved neuromuscular coordination
- increased maximal and explosive strength
- improved tendon stiffness (elastic properties)
- reduced ground contact time
- better utilization of the stretch–shortening cycle
These adaptations lead to a significant improvement in running economy, meaning reduced energy expenditure at a given speed.
According to the literature, incorporating strength training into the programs of endurance runners can improve running economy and performance without negatively affecting VO₂max.
How Strength Training is Applied in Runners
Based on scientific evidence, strength training is not merely a supplementary component but an integral part of a runner’s preparation.
For runners preparing for 6 km and 10 km races, such as the SNF Nostos Run, proper integration of strength training contributes to:
- improved running economy
- maintenance of speed under fatigue
- reduced injury risk
- improved movement mechanics
The practical application of strength training is based on a simple yet essential principle:
identify – correct – improve.
Through control and strengthening exercises, runners can recognize potential asymmetries and functional weaknesses, correct them, and ultimately enhance performance through more efficient movement patterns.
Basic Implementation Principles
Strength training should be performed:
- twice per week
- on days that do not interfere with key running sessions
- with emphasis on movement quality and control
Exercise Selection
The focus should be on multi-joint exercises that functionally resemble running mechanics, such as:
- squats
- lunges
- step-ups
- core exercises
Particular emphasis is placed on the posterior kinetic chain (glutes, hamstrings, calf muscles), which is crucial for:
- force production during propulsion
- pelvic stability
- improved running economy
- reduced injury risk
At the same time, strengthening the posterior chain helps restore muscular imbalances and improve movement symmetry, reducing the mechanical loads accumulated during training.
Recent reviews confirm that systematic strength and plyometric training lead to significant improvements in endurance running performance.
Strength training is not an alternative to endurance training, but the mechanism that allows runners to fully utilize their aerobic potential.
The better an athlete can produce, control, and distribute force, the more efficiently and economically they can run.
Dimitrios Theodorakakos
Sports Director @sportsexcellence
Sports Excellence Team