Have you ever been out for a run and found your arms getting tired before your legs?
It catches people off guard when it happens. Your legs still feel like they’ve got more to give, but your shoulders tighten, your arms feel heavy, and your form starts to slip. It’s not what you expect from a sport that’s supposed to be all about the legs.
Then take a look at your strength training. How much time do you spend working your legs? Probably quite a lot. Your core might get some attention too. But what about your shoulders and arms?
For most runners, upper body work sits somewhere between optional and not really necessary. That’s where the problem starts, because upper body strength for runners is not optional if you want to run efficiently and finish strong.
The reality is that you can’t separate your arms from your running. They are part of the system that keeps you moving efficiently, especially when fatigue starts to build.
Try to imagine running without moving your arms. It feels awkward straight away, your balance is off, your rhythm disappears, and you lack power to run faster. That’s because your arms are doing far more than you probably give them credit for.
Your Arms Are Part of the Running Machine
Every step you take relies on coordination between your upper and lower body, which is exactly why upper body strength for runners plays such an important role.
Your arms help drive your rhythm. When they swing in a controlled, forward and back motion, your legs naturally fall into sync. If your arm swing becomes erratic, crosses your body, or slows down, your stride tends to follow.
They also stabilise your torso. Running creates rotational forces through your body, and your arms help control that movement so you are not wasting energy twisting from side to side. This becomes even more important as you get tired or when you are pushing the pace.
Think about hills or the final stretch of a run. When you want to push harder, you naturally drive your arms more. That movement helps generate momentum and keeps your stride turning over when your legs are under pressure.
Without upper body strength, that arm drive fatigues early. When this happens, your posture drops, your breathing tightens, and your efficiency disappears.
Strength is Not Just About Your Legs
It makes sense that runners prioritise leg strength, but focusing only on your lower body creates imbalance.
Upper body strength is often overlooked, yet it is what allows your posture to stay strong and your movement to stay controlled. Strong legs paired with a weak upper body often lead to compensation. Your shoulders creep upwards, your neck tightens, and your arm swing becomes inefficient.
Over time, this shows up as wasted energy. You feel like you are working harder than you should for the pace you are running. You might also notice discomfort in your neck, shoulders, or upper back, especially on longer runs.
No one part of your body works in isolation from another so it makes sense that we work the entire system to create an efficient running machine.
The Impact of Age & Menopause
As you get older, maintaining muscle mass becomes more important, and more challenging.
From your 30s onwards, you naturally begin to lose muscle if you are not actively working to maintain it. For women, during and after menopause, this process speeds up due to hormonal changes, particularly the decline in estrogen.
This makes upper body strength for runners even more important.
Many runners notice that their upper body strength drops off faster than their lower body strength, as they get older. Arms feel heavier during runs, posture becomes harder to maintain, and fatigue creeps in earlier than expected. You might feel strong at the start of a run but struggle to hold your form later on.
It is a physiological shift, over time our body experiences wear and tear, hormonal changes, accumulated stress and tension, all of which can lead to small inefficiencies in how you run.
The good news is that strength training helps counter this. By focusing on upper body strength for runners, you can maintain muscle, support your posture, and continue running efficiently as your body changes.
How Rounded Shoulders Affect Your Running
There is another piece to this that often gets overlooked, and that is posture outside of running.
Many people spend hours sitting at a desk, working on a laptop, or looking down at a phone. Over time, this creates a rounded shoulder position and with that comes tight chest muscles tightens, weakness in your upper back, and your head shifts slightly forward.
Maybe you do work on strengthening your upper body, but if your shoulders are rounded forward, your movement is restricted and you are not making the most out of that upper body work.
When you run in this position, your chest cannot fully open. This limits how much your lungs can expand, which directly affects your breathing and you find yourself taking shorter, shallower breaths, especially as the effort increases.
Your arm swing also changes. Instead of moving cleanly forward and back, your arms drift inward and across your body. This creates unnecessary rotation through your torso, which wastes energy and disrupts your rhythm.
There is also a loss of range of movement.
Even with good upper body strength, that rounded position prevents you from using your muscles fully. Your shoulders cannot extend properly, your arms cannot drive as effectively, and everything feels tighter than it should.
You may also notice more tension building in your neck and upper shoulders, leading to earlier fatigue during your runs. There is also a knock on effect on the rest of your body. As your upper body is leaning forward from the shoulders instead of the ankles you hips tend to drop back. This can lead to overstriding, increased load on the knees and less power on push off.
If you have rounded shoulders, start working on them now. Follow this routine to help bring your shoulders back in alignment. Be mindful of your daily posture, take a mental check while you are sitting at your desk, on your phone or watching tv. Are your shoulders rounded and head forward?
Good Running Form Starts with Good Posture
Good running form depends on posture, and posture depends heavily on upper body strength.
When your shoulders, upper back, and core are strong, you can hold an upright position with a slight forward lean from the ankles. Your chest stays open, your breathing remains unrestricted, and your stride stays efficient.
When those muscles are weak, everything collapses.
Your shoulders round forward. Your head drops. Your chest tightens. Your hips follow, and suddenly you’re running in a seated position without even realizing it. This not only wastes energy but also increases the risk of discomfort and injury, particularly in the neck, shoulders, and lower back.
You can’t separate posture from performance. They are linked.
The Effects of Poor Upper Body Strength on Your Running Performance
When upper body strength is lacking, the effects show up in subtle ways at first, but they build over time and start to impact both performance and comfort, especially on longer or harder runs:
- Your shoulders rise and tighten, creating unnecessary tension through your neck and upper back
- Your posture begins to collapse, making it harder to stay upright and run efficiently
- Your breathing becomes more shallow and restricted as your chest cannot fully open
- Your arm swing becomes less controlled, often crossing your body and wasting energy
- Your rhythm and coordination start to break down, particularly under fatigue
- Your legs have to work harder to compensate, increasing overall effort for the same pace
- You struggle to maintain pace or finish strong, even when your legs feel capable
These small breakdowns in form are often linked back to poor upper body strength for runners, and over time they can make running feel harder than it needs to be.
A Simple 15 Minute Workout for Upper Body Strength for Runners
You do not need long gym sessions to make a difference. A focused 15-minute routine done two to three times per week is enough to build upper body strength for runners, improve posture, and support your running.
Warm-up (2 minutes)
Arm circles forward and backward for 30 seconds each
Shoulder rolls and gentle shrugs for 30 seconds
Torso rotations for 30 seconds
Main workout (12 minutes)
Work for 40 seconds, rest for 20 seconds. Complete two rounds.
- Push-ups
Keep your body in a straight line and engage your core. This builds strength through your chest, shoulders, and arms. - Bent-over rows
Use dumbbells or a resistance band. Focus on pulling your elbows back and squeezing your shoulder blades together to strengthen your upper back. - Shoulder taps
Start in a high plank and tap one shoulder with the opposite hand. Keep your hips steady to build shoulder stability and core control. - Overhead press
Press weights or a band overhead while keeping your core engaged and your ribs down. This develops shoulder strength and endurance. - Reverse fly
Use light weights or a band. Open your arms out to the sides while slightly hinged forward. This helps counteract rounded shoulders and improves posture. - Plank hold
Hold a solid plank position, focusing on alignment from shoulders to heels. This ties your upper body and core together.
Finisher (1 minute)
- Standing arm drive. Stand tall and pump your arms as if you are running hard. Focus on driving your elbows back, keeping your shoulders relaxed, and maintaining rhythm.
Upper Body Strength for Runners - Could this be your missing link?
Upper body strength just may be the missing link in your running performance. You are putting in the miles, building strength through your core and lower body, but if you have neglected your upper body, you are leaving potential on the table. When you improve upper body strength, you give your legs more support to power through to the end of a race, you make your breathing more efficient and controlled, and you hold your form together when you need it most.
Just think how different your running will feel when everything works in sync instead of fighting against itself. And if you know you have rounded shoulders, start working on those too. Open up your chest, strengthen your upper back, and notice how it changes the way you move, breathe, and finish your runs.
If you want to bring all of this together into your training, inside Achieve Running Club you’ll find structured strength sessions, guided run plans, and support to help you build a stronger, more efficient running body. It’s about more than just getting the miles done, it’s about running well and feeling good while you do it.
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