Why core stability matters for cyclists (and it's not about abs)
Most cyclists who start "core work" are thinking about planks, hollow holds, and maybe some Pilates-inspired moves from a YouTube video. That's fine. But if you're doing all of this hoping it will directly push up your FTP, you might be disappointed. A 2024 study published in Cureus found that twelve weeks of isolated core exercises — glute bridges, abdominal planks, prone back extensions — did not significantly improve mean power output at any duration from five seconds to twenty minutes in trained road cyclists. The researchers concluded that core training alone is not a time-efficient strategy to improve raw cycling performance. That's a useful data point, and it doesn't mean core work is pointless. It means the argument for it is different from the one most people make.
Because the research also shows something important from the other direction: when your core fatigues, your mechanics fall apart. A study by Abt and colleagues on competitive cyclists found that after a core fatigue protocol, total frontal-plane knee motion, sagittal-plane knee motion, and sagittal-plane ankle motion all increased significantly. Your knee starts drifting inward, your ankle loses its stable platform, and the smooth pedal stroke you've trained for begins to unravel. Think of core training for cyclists not as a power generator, but as the chassis that stops your power from leaking out the sides. You can have a 400-watt engine in a car with a bent frame — it still won't go where you point it.
This reframing matters. Core stability work earns its place in your training week not by lifting your peak numbers, but by protecting the consistency of your mechanics across two, three, four hours of riding — and by reducing the injury risk that comes with repetitive load on a destabilised pelvis.
What the cycling core actually includes
The gym definition of "core" often stops at the rectus abdominis — the six-pack muscles. For cyclists, the relevant anatomy is everything between your shoulders and pelvis: lumbar extensors, obliques, deep hip stabilisers including the glute medius, the quadratus lumborum, and the muscles around the thoracic spine that stop your upper body from collapsing under accumulated fatigue. It's less about peak force and more about sustained control. The muscles you most need on a long ride aren't the ones that fire explosively for a sprint; they're the ones that keep your pelvis level through thousands of pedal strokes and prevent your lower back from rounding into a pained C-shape on the last climb of the day.
There's a direct mechanical argument here too. The pelvis is the base from which both legs push. If it tilts and rocks with each downstroke because the supporting musculature isn't holding it steady, you lose the clean mechanical advantage of a stable platform. Longer rides, heavier gearing, and steep gradients all expose this faster. Riders who feel fine on a forty-minute indoor session but end up aching and shuffling after three hours outdoors often have a core endurance deficit that only shows up under cumulative fatigue — not because they're weak, but because the endurance capacity of those stabilising muscles hasn't been trained to match their aerobic fitness.
If you're also working on strength training as a cyclist, it's worth noting that compound movements like deadlifts, single-leg Romanian deadlifts, and Bulgarian split squats already demand significant core stability. This is one reason conventional resistance training tends to transfer more broadly to cycling than isolated core exercises alone — it trains the stabilisers as a system rather than in isolation.
How often, when, and what that looks like in practice
Two sessions per week is plenty for most amateur riders. Twenty to thirty minutes each, focused on quality movement rather than accumulated reps. You don't need a dedicated core day — in fact, that's often where cyclists go wrong, treating it as a separate obligation they have to "fit in" before eventually dropping when life gets busy. The smarter approach is to bolt core work onto the end of an easy ride day, or use a short activation sequence before a harder session. Make it a habit that lives inside existing structure rather than demanding its own time slot.
Timing matters more than most riders realise. Core work is neuromuscular — it asks your stabilising muscles to fire with precision and resist fatigue. Heavy planks and single-leg glute bridges the day before your hardest interval session means adding residual fatigue to muscles you need operating cleanly during those efforts. The rule is simple: never do meaningful core work on the day before or the day of a key ride. Save it for recovery days, easy days, or the tail end of a session that didn't ask much of you. During race build phases or weeks with three demanding days packed in, core sessions can drop to once a week without much loss. The consistency of showing up twice a week over months matters far more than any individual session.
The best core exercises for cyclists aren't the most dramatic ones. They're movements that replicate the stability demands of riding — single-leg glute bridges, dead bugs, pallof presses, Copenhagen planks, and side-lying hip abductions — exercises you can do consistently without grinding yourself into the ground. The goal is to make the stabilising muscles more fatigue-resistant, not to accumulate heroic training stress.
The mistakes that waste your time
Let's be direct: the most common mistake is choosing exercises that feel hard in the wrong way. Sit-ups and crunches train spinal flexion, which cycling already loads heavily across every ride. You don't need more of it. What you need is anti-rotation, anti-extension, and lateral stability — the kind of work where your spine stays neutral while your limbs move, not the kind that curls your lumbar spine into a punishing C. If your "core session" is mostly crunches and sit-ups, you're doubling down on a pattern your body already gets too much of.
The second mistake is doing core work when you're already fatigued. Technique falls apart under tiredness, and poor movement patterns done repeatedly aren't neutral — they reinforce bad motor control. If you're doing a plank with hips sagging and your lower back quietly complaining, you're not training stability. You're practising poor posture. Twenty clean reps always outperform forty sloppy ones, and knowing when to stop is as much a skill as the exercise itself.
A third, subtler mistake is treating core work as the solution to a bike fit problem. Riders with persistent lower back pain or knee tracking issues often add more core exercises hoping it will resolve things. Sometimes it helps at the margins. Often the underlying cause is a saddle height, cleat position, or handlebar reach that needs addressing first. Core stability can improve your capacity to tolerate a marginally imperfect position; it can't undo a fundamentally wrong one. Pair any serious core programme with a proper fit review, and you'll get far more return from both. It's also worth looking at mobility work for cyclists alongside stability training — stiff hips and a tight thoracic spine force the lumbar region to compensate, and no amount of core strengthening fixes a mobility restriction upstream.
Sources
- Sitko S, López-laval I, Cirer-sastre R. (2024). Influence of conventional resistance training compared to core exercises on road cycling power output. Cureus / PMC. Read study
- Abt JP et al. Relationship between cycling mechanics and core stability. Journal of Strength and Conditioning Research. Read study
- Vikestad A et al. (2025). Strength training among professional UCI road cyclists: Practices, challenges, and rationales. PLOS One. Read study
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