Why Endurance Athletes benefit from Strength Training

Swimming, cycling, and running form the foundation of training for many endurance athletes. The focus is often placed on training volume and intensity within each discipline, while strength training is frequently regarded as secondary or omitted altogether. However, sports science research has clearly shown this for many years: strength training is not an optional add‑on, but a central component of injury prevention, movement economy, and sustainable performance development in endurance sports.

The Specific Demands of Endurance Sports

Endurance sports are characterised by extremely high numbers of repeated, similar movements. During running, thousands of ground contacts occur per training session; in cycling, countless pedal revolutions are performed; and in swimming, repetitive arm and leg movements dominate. This monotonous loading places high demands on muscles, tendons, and joints.

Problems arise primarily when muscular stabilisation is insufficient to control these forces over time. In such cases, part of the load is transferred to passive structures that are not designed to handle it. This increases the risk of overuse complaints such as patellar tendon problems, Achilles tendon irritation, back pain, or shoulder issues.

Strength Training as an Effective Tool for Injury Prevention

Numerous sports medicine studies demonstrate that targeted strength training significantly reduces the risk of sports injuries. This effect is particularly pronounced for overuse injuries, which are common in endurance sports. From a mechanistic perspective, this benefit is easy to explain: strong muscles stabilise joints, improve movement control, and reduce harmful peak loads.

An important point is that the goal is not maximal muscle mass. What matters most are functional strength, coordination, and the ability to control forces efficiently over long periods of time. Even moderate, regular strength stimuli lead to measurable improvements in the load tolerance of the musculoskeletal system.

Improved Economy Through Neuromuscular Adaptations

In addition to injury prevention, endurance athletes also benefit from strength training in terms of performance physiology. Studies show that strength training can improve running, cycling, or swimming economy without negatively affecting aerobic capacity.

These effects are largely driven by neuromuscular adaptations. Improved recruitment of motor units, increased muscle–tendon stiffness, and a more stable body posture result in lower energy expenditure per movement. For endurance athletes, this means achieving the same performance with reduced energy cost.

The Key Role of the Core Musculature

A central element of modern training concepts is core stability. The core connects the upper and lower extremities and plays a crucial role in force transmission. When this central structure is unstable, part of the generated force is lost or leads to inefficient compensatory movements.

Especially in swimming, targeted core training has been shown to stabilise body position in the water and improve the effectiveness of the arm pull. However, in running and cycling as well, a stable core contributes to more economical movement patterns and reduces compensatory motions.

Simple, Effective Strength Exercises Without Equipment

For endurance athletes, strength training does not need to be complex or time‑consuming. Simple bodyweight exercises can effectively target all relevant muscle groups.

Squats
Squats train the thighs, glutes, and core. They improve force production at the hip and knee and support proper leg alignment—an essential prerequisite for injury‑free running and efficient cycling.

Lunges
Lunges promote single‑leg strength and stability. Since running and cycling are predominantly single‑leg activities, lunges are particularly valuable in reducing knee and hip issues.

Plank
The plank is a fundamental exercise for stabilising the entire core. It improves posture on the bike, supports a stable body position in swimming, and facilitates effective force transfer while running.

Side Plank
The side plank targets the lateral core musculature, which plays an important role in pelvic stability. Good lateral stabilisation is especially important for runners to counteract asymmetrical loading.

Push‑ups
Push‑ups strengthen the chest, shoulders, and arms while also promoting core tension. They are particularly relevant for swimmers but also contribute to a stable upper‑body position in cycling.

What to Do When Both Are Trained on the Same Day

A common question concerns the order of strength and endurance training when both sessions take place on the same day. Sports science research shows that for long‑term endurance adaptations, the order plays only a minor role.

In practice, however, a clear rule has proven useful: the training goal with the highest priority should be performed first. If an intensive or technically demanding endurance session is planned, it should take place before strength training to avoid fatigue‑related reductions in quality. If the focus is on strength or stability development, strength training can be sensibly scheduled before an easy endurance session.

It is also important to avoid performing intensive sessions directly back‑to‑back whenever possible. A time gap of several hours can help minimise unwanted fatigue effects.

Training Volume and Frequency: What Makes Sense?

For most endurance athletes, two short strength training sessions per week are sufficient. As little as 20 to 30 minutes, with a focus on quality and control, are enough to achieve relevant adaptations. What matters most is long‑term integration into the training routine, not maximal exhaustion.

Conclusion

The scientific evidence is clear: strength training is a core component of sustainable endurance training. It reduces the risk of injury, improves movement efficiency, and supports long‑term, stable performance development. Athletes who regularly integrate simple, functional strength exercises benefit not only in terms of performance, but above all in their overall health—allowing them to remain committed to endurance sports for many years.

References (selected)

• Lauersen JB et al. Strength training as prevention of sports injuries. British Journal of Sports Medicine.
• Lauersen JB et al. The effectiveness of exercise interventions to prevent sports injuries. BJSM.
• Hameed I et al. Role of strengthening exercises in prevention of overuse injuries. Journal of Sports Medicine & Physical Fitness.
• Rodríguez‑Perea A et al. Core training and performance: a systematic review and meta‑analysis. Biology of Sport.
• Liu S et al. Effects of core stability training on swimming performance. BMC Sports Science, Medicine and Rehabilitation.
• Vikestad V, Dalen T. Effect of strength and endurance training sequence. Sports (MDPI).
• Zhang F et al. Concurrent strength and endurance training sequence. Frontiers in Sports and Active Living.