Strength Training For Runners: Why It Should Be Part Of Every Training Plan

Most runners love running, which probably isn't much of a surprise. If given the choice between heading out for a 10K run or spending an hour in the gym, many of us would lace up our running shoes every single time. Unfortunately, while running is the best way to become a better runner, it isn't the only thing your body needs if you want to stay injury-free and continue improving.

Strength training has become one of the most important parts of modern running programmes. Elite athletes have understood its value for years, but recreational runners are increasingly discovering that spending a couple of sessions each week building strength can improve performance, reduce injuries and make running feel easier. The key is understanding how strength training fits into your running plan and remembering that it should complement your running rather than replace it. A well-balanced training programme combines running, recovery, mobility and strength work. Each plays a different role, and when they're all working together they can help you become a stronger, healthier and more resilient runner.

Why Strength Training Matters

Every stride you take places significant forces through your muscles, tendons, joints and bones. During a marathon you'll take somewhere in the region of 35,000 to 50,000 steps, depending on your stride length. If your muscles aren't strong enough to cope with those repeated impacts, fatigue sets in earlier, your running form begins to deteriorate and the risk of injury increases.

Strength training improves your body's ability to absorb those forces more efficiently. Stronger muscles provide better support for your joints, improve stability and allow you to maintain good running form even when you're tired. That means you're not only less likely to get injured, but you're also more likely to finish races feeling stronger.

Perhaps one of the biggest misconceptions is that strength training is only for runners looking to improve performance. In reality, it benefits every runner, whether you're trying to complete your first Couch to 5K programme or qualify for the Boston Marathon.

Running Alone Isn't Enough

It's easy to assume that because running strengthens your legs, there's no need for additional exercise. While running certainly develops muscular endurance, it doesn't build strength particularly effectively.

Running is a repetitive movement that primarily takes place in a single direction. Over time this can create muscular imbalances, with some muscles becoming very strong while others remain comparatively weak. Weak glutes, hips and core muscles are particularly common among runners and are often linked to injuries affecting the knees, lower back and Achilles tendon.

Strength training addresses those weaknesses by targeting muscles that running alone simply doesn't develop sufficiently. Improving overall strength creates a more balanced body that can cope better with the demands of regular training.

Strong Legs Mean Better Running

If there is one area every runner should prioritise, it's leg strength. The quadriceps, hamstrings, calves and glutes all work together to produce an efficient running stride. When one muscle group becomes weaker than the others, the body compensates by placing additional stress elsewhere. Over time this compensation can lead to overuse injuries that interrupt your training.

Exercises such as squats, lunges, split squats, step-ups and Romanian deadlifts all help develop the strength needed to support efficient running. They also improve balance and stability, particularly when performed one leg at a time, which closely mirrors the demands of running itself.

Building stronger legs isn't about lifting the heaviest weights in the gym. The aim is to improve functional strength that transfers directly into better running mechanics and greater resilience over long distances.

Don't Forget Your Core

When runners hear the word "core," many immediately think about developing visible abdominal muscles. In reality, your core includes the muscles throughout your abdomen, lower back, hips and pelvis, all of which play a vital role in maintaining good running posture.

A strong core helps keep your upper body stable while your legs work underneath you. As fatigue develops during longer runs, weaker core muscles often allow your posture to collapse, making your running less efficient and placing additional strain on your hips and lower back.

Simple exercises such as planks, side planks, bird dogs and dead bugs can make a significant difference when performed consistently. They require very little equipment but provide valuable support for every mile you run.

Upper Body Strength Has A Role Too

Although running is obviously dominated by the legs, your upper body contributes more than many runners realise. Your arms help maintain rhythm and balance throughout each stride, particularly when running uphill or during faster efforts. Strong shoulders and upper back muscles also help maintain an upright posture during long races when fatigue begins to take over.

You don't need to develop the physique of a bodybuilder, but including exercises such as rows, press-ups and shoulder presses as part of a balanced strength programme can help improve overall running efficiency.

The rowing machine is perfect for building strong legs

The Indoor Rower And Other Cross-Training Equipment

Strength training doesn't always have to involve barbells and dumbbells. Some of the most useful pieces of equipment for runners combine strength and cardiovascular fitness in one workout.

The rowing machine is one of the best examples, It provides a full-body workout that strengthens the legs, glutes, back, shoulders and core while also developing aerobic fitness. Because rowing is low impact, it allows runners to build fitness without placing the same stress on their joints as another hard running session.

Other excellent options include air bikes, ski ergs, assault bikes and elliptical trainers. These machines can provide valuable variety during a training programme and are particularly useful when recovering from minor injuries or looking to reduce overall impact while maintaining fitness. However, it's important to remember that these machines are supplements to your running, not replacements for it.

Strength Training Doesn't Replace Running

One of the biggest mistakes runners make is believing that a gym session can replace a scheduled run. While strength training and cross-training both improve general fitness, neither develops the specific adaptations that come from running itself.

Your cardiovascular system, muscles and nervous system all adapt differently when you're running. Long runs improve endurance, tempo sessions develop your lactate threshold and intervals increase your speed. These are highly specific adaptations that simply cannot be replicated by lifting weights or spending an hour on a rowing machine. Strength training should therefore be viewed as supporting your running rather than replacing it.

The exception, of course, is when you're injured. In those circumstances, cross-training equipment such as the rowing machine can help maintain a good level of cardiovascular fitness while you recover under professional guidance.

How Often Should Runners Do Strength Training?

For most runners, two strength sessions each week is enough to see significant benefits without interfering with running performance. These sessions don't need to last for hours. Forty-five to sixty minutes of focused training covering the major muscle groups is often more than sufficient. During heavy marathon training blocks you may choose to reduce the intensity slightly, while in the off-season you can spend more time building strength before race-specific training begins again.

Consistency is far more important than trying to complete long gym sessions occasionally. Two well-planned workouts every week throughout the year will almost always deliver better results than an intensive programme that only lasts a month.

Keep It Simple

Strength training doesn't have to be complicated. Many runners feel intimidated by gyms or assume they need elaborate programmes involving dozens of different exercises. In reality, a handful of well-chosen movements performed consistently can produce excellent results.

Focus on exercises that develop the muscles most important for running, improve balance and strengthen your core. Add resistance gradually as your technique improves and prioritise good form over lifting heavier weights.

If you're new to strength training, consider working with a qualified coach or personal trainer for a few sessions. Learning correct technique early will help you build confidence and reduce the risk of injury.

Final Thoughts

Running will always be the most important part of your training if your goal is to become a better runner. There is simply no substitute for getting out and covering the miles. However, strength training provides the foundation that allows you to keep doing exactly that, week after week and year after year.

By developing stronger legs, a more stable core and better overall strength, you'll improve your running economy, reduce your injury risk and give yourself the best possible chance of reaching your goals. Equipment such as the Concept2 rower can also play an important supporting role by developing strength and cardiovascular fitness with minimal impact on your joints.

Think of strength training as an investment in your running rather than a distraction from it. It shouldn't replace your scheduled runs, but when added alongside them it can become one of the most valuable parts of your entire training programme.