Here's the thing nobody tells you about breaking your collarbone: it's not the break that defines the next three months of your life. It's the decisions you make in the first week. Surgery or sling. How you sleep. When you get back on the turbo. Whether you push through pain at week four because you feel fine, or whether you trust the timeline and let the bone do what bone needs to do.
The clavicle is cycling's signature fracture. Roughly 30% of all cycling fractures are collarbones. If you ride long enough, you'll break one or you'll know someone who has. And yet most cyclists walk out of A&E with a sling, a leaflet, and almost no practical guidance on what happens between now and the moment they clip back in.
This is that guide. Not the overview — I've covered collarbone fractures briefly in the crash recovery piece. This is the full picture. From the mechanism of injury through to the first group ride back.
Why the collarbone breaks
The clavicle is basically a strut. It connects your shoulder to your sternum and it's the only bony link between your arm and your trunk. When you crash, your arm goes out instinctively. The impact force travels up through your hand, your forearm, your upper arm, hits the shoulder, and the clavicle takes the brunt. It absorbs the force that would otherwise go into your neck, your ribs, your spine. In a very real sense, it breaks so something worse doesn't.
Direct impact works the same way. Fall directly onto the point of your shoulder — classic over-the-bars or sideways-into-a-kerb landing — and the clavicle is the first rigid structure in the chain. It's relatively thin, it's S-shaped, and it has minimal muscular protection compared to your femur or your humerus. It's designed to be sacrificial.
This is why you can crash at 15kph and break it. The speed matters less than the angle and the mechanics of the fall. An outstretched arm at the wrong angle will transmit enough force. A direct shoulder impact will do it every time.
Types of fracture: why location matters
Not all clavicle fractures are the same, and the location changes everything about how it heals.
Midshaft fractures account for about 80% of clavicle fractures. These are breaks in the middle third of the bone, where it's thinnest and has the least structural support. The good news: midshaft fractures generally have the best blood supply and the most predictable healing. The bad news: this is where displacement is most common, because the muscles attached above and below the break pull the fragments apart. The sternocleidomastoid pulls the inner fragment up, the weight of your arm and the pectoralis pull the outer fragment down, and you end up with that visible bump or step deformity that makes everyone in the changing room wince.
Distal fractures — the outer third, near the shoulder — make up about 15%. These are trickier. The coracoclavicular ligaments sit near this area, and if they're disrupted, the fracture becomes unstable. Distal fractures have higher rates of non-union (failure to heal) and often need surgical fixation even when the displacement looks modest on X-ray.
Proximal fractures — the inner third, near the sternum — are rare, accounting for roughly 5%. They heal well but occasionally mask injuries to the structures behind them: the great vessels, the trachea, the oesophagus. If you've fractured the medial end of your clavicle with a high-energy mechanism, expect a CT scan to rule out associated injuries.
Let me be really clear about this: the type and location of your fracture dictate the treatment approach. Two riders can crash the same way, break the same bone, and face completely different recovery paths. Get the imaging. Understand your fracture pattern. Ask your surgeon to explain what they see on the X-ray.
Surgical vs conservative: the decision
This is the question every cyclist with a broken collarbone asks within the first 48 hours, usually while loaded on codeine and unable to sleep. Should I have the plate?
The answer is not one-size-fits-all, and the evidence has shifted over the past two decades. Here's where it gets really interesting.
When surgery makes sense
Open reduction and internal fixation — ORIF, plate and screws — is the standard surgical approach. The surgeon makes an incision over the fracture, realigns the fragments, and fixes them with a pre-contoured titanium plate and six to eight screws. The plate takes the load, holding the bone in alignment while it heals.
Surgery is typically indicated when:
- Displacement is significant — more than 2cm of shortening between the fragments. Shortened fractures heal in a shortened position, which alters shoulder mechanics and can cause long-term issues.
- Comminution — the bone has shattered into multiple fragments rather than a clean break. Multiple fragments don't self-align well.
- Skin tenting — a sharp fragment is pushing against the skin from the inside. Left untreated, this can lead to skin breakdown and an open fracture, which is a surgical emergency.
- Associated injuries — damage to the subclavian vessels or brachial plexus (the nerve bundle that controls your arm) alongside the fracture.
- Non-union after conservative treatment — the fracture hasn't healed after 3-4 months in a sling.
For cyclists specifically, there's a practical consideration. The plate provides structural stability from day one. You're not waiting for callus formation before you can load the arm. This typically means an earlier return to the turbo, earlier return to road riding, and lower risk of the fracture displacing during the healing period. The Canadian Orthopaedic Trauma Society's 2007 trial and subsequent meta-analyses consistently show lower non-union rates with surgical fixation for displaced fractures.
When conservative treatment works
Non-displaced or minimally displaced fractures — where the fragments are still roughly aligned and there's less than 1-2cm of shortening — heal well without surgery. A broad arm sling for 2-4 weeks, progressive mobilisation, and time.
The current evidence, reflected in updated NICE and BOA guidelines, is clear: for non-displaced midshaft fractures, outcomes at one year are essentially equivalent between surgery and conservative management. Surgery introduces risks — infection (about 3-5%), hardware irritation requiring removal (10-15% eventually request plate removal), scarring, and the inherent risks of general anaesthetic. If the fracture pattern doesn't mandate surgery, those risks aren't justified.
The figure-of-eight brace vs simple sling
This one is settled. A 2014 Cochrane systematic review compared figure-of-eight braces with simple arm slings for clavicle fractures and found no difference in healing rates, functional outcomes, or complication rates. What they did find: the figure-of-eight brace is significantly less comfortable, causes skin breakdown in the axilla, and can compress the brachial plexus if applied incorrectly, causing numbness and tingling in the arm.
Most orthopaedic surgeons and sports medicine practitioners have abandoned the figure-of-eight brace. If someone puts you in one, ask them why — and whether a sling would do the same job with less misery.
Pain management and the first two weeks
Let me break this down practically, because the first two weeks are rough and nobody prepares you for quite how rough they are.
Pain. The first 72 hours are the worst. Most people manage with a combination of paracetamol (1g every 4-6 hours, maximum 4g daily) and codeine or co-codamol as prescribed. NSAIDs like ibuprofen are effective but come with a caveat: they suppress the inflammatory response that initiates fracture healing. Dr Gabe Mirkin, who coined the RICE protocol and has since reversed his position on anti-inflammatory use, recommends limiting NSAIDs to 48-72 hours maximum. After that, switch to paracetamol alone. If you need more than paracetamol at the two-week mark, something isn't right and you should be back at your GP.
Sleep. This is the part that grinds people down. Lying flat puts traction through the fracture site. You roll onto the injured side in your sleep and wake up in genuine distress. The pillow trick: sleep in a reclined position, propped at 30-45 degrees. A wedge pillow works. A stack of regular pillows works. Sleeping in a recliner chair for the first week works surprisingly well, though your back will complain about it. Place a small pillow under the forearm of the injured side so the arm is supported and the weight isn't dragging on the fracture. Keep the sling on at night for the first week.
Movement. Your fingers, wrist, and elbow should stay active from day one. Gentle pendular shoulder exercises — leaning forward and letting the arm swing like a pendulum — can start from the end of week one if tolerated. The goal is to prevent the shoulder from stiffening into a frozen state while respecting the fracture. Physiotherapy guidance here is invaluable. Ask for a referral early, not at week six when the shoulder is already locked.
The rehabilitation timeline
This is what most people actually want: a week-by-week map. A few caveats first. This timeline is a guide, not a prescription. Your fracture, your body, your surgeon's assessment — all of these take priority. The timeline is slightly different for surgical versus conservative management, and I've noted where they diverge.
Weeks 1-2: protection
Sling use. Pain management. Gentle finger, wrist, and elbow movement to prevent stiffness. Light pendular shoulder exercises at end of week one if tolerated. Ice for 15-20 minutes, three to four times daily, helps with swelling (wrap the ice pack — never directly on skin). Absolute rest from riding. Don't even sit on the turbo. Your body is laying down the initial soft callus at the fracture site, and this process needs to be uninterrupted.
Weeks 2-4: early mobilisation
Physiotherapy starts in earnest. Gentle active-assisted shoulder range of motion — forward flexion, external rotation, scaption (raising the arm in the plane of the scapula). The physio will guide the limits based on your fracture stability. Pain is the governor. If it hurts at the fracture site, you've gone too far.
Turbo trainer (with medical clearance): This is the window where many cyclists can begin. The rules are strict. Upright position only. Hands resting on bar tops — not hoods, not drops, not gripping. No out-of-the-saddle efforts. Zone 1, 20-30 minutes. The purpose is cardiovascular maintenance and mental health, not training. If the fracture site aches during or after, stop and wait another week.
Surgically repaired fractures may allow turbo riding slightly earlier — the plate provides structural stability that conservative fractures lack — but this is your surgeon's call, not yours.
Weeks 4-6: progressive loading
Shoulder range of motion exercises increase in range and load. Light resistance band work — external rotations, rows with the band anchored at hip height, wall slides. The emphasis is on scapular control and rotator cuff activation, not strength. Your shoulder has been effectively immobilised for a month and the stabilising muscles have atrophied. They need rebuilding before you load them.
Turbo sessions extend to 45-60 minutes. Zone 2 is introduced. You can begin riding in a more normal position if the shoulder tolerates it — hands on the hoods, though still no aggressive grip. Standing efforts remain off limits until radiographic confirmation of healing.
Weeks 6-8: the X-ray gate
This is the checkpoint. A follow-up X-ray to confirm bony union. Until a qualified professional confirms radiographic healing, you are not riding outdoors. I know you feel fine. I know the fracture doesn't hurt. The X-ray either shows union or it doesn't, and this is non-negotiable.
With confirmed healing, outdoor riding begins. Smooth, familiar roads. No group rides. No technical descents. Moderate effort — Zone 2 to low Zone 3. Build duration at 10-15% per week. You're reconditioning your shoulder to handle road vibration, braking forces, and the occasional pothole. Light dumbbell shoulder exercises continue — external rotations, lateral raises, prone Y-T-W exercises for scapular stability.
Weeks 8-12: return to full riding
Progressive return to normal riding. Group rides, varied terrain, higher intensities. Standing efforts. Sprints. Technical descents, when you're psychologically ready. By this point the bone is solid, but the surrounding soft tissue — the ligaments, the joint capsule, the deltoid and trapezius — may still be catching up.
Return criteria your physio should assess before full clearance:
- Full, pain-free shoulder range of motion in all planes
- Symmetrical shoulder strength (within 10% of the uninjured side)
- Normal scapular control — no winging, no hiking
- Ability to support bodyweight through the arm (a modified push-up position is a useful test)
- Confident, pain-free weight-bearing through the arm in a riding position
If any of these aren't met, you're not ready for group riding or situations where you might need to brake hard, manoeuvre sharply, or take another impact.
Scar tissue and shoulder mobility
Here's something most recovery guides skip. The fracture itself heals, but the shoulder gets stiff. Not necessarily frozen — true adhesive capsulitis is uncommon with clavicle fractures — but tight. Restricted. You'll notice it reaching overhead, reaching behind your back, and in the drop position on the bike.
Scar tissue forms at the fracture site, and if you had surgery, along the incision line. Cross-friction massage along the scar once it's fully healed (typically 6-8 weeks post-surgery) helps remodel the collagen and prevent adhesion to the underlying tissue. Your physio can show you the technique. It's mildly uncomfortable and remarkably helpful.
Shoulder mobility work should continue for 3-6 months after the fracture. Sleeper stretches for internal rotation, doorway stretches for pectoral length, and thoracic spine mobility drills all contribute to restoring the full range you need for a comfortable riding position.
The psychological recovery
Let me be really clear about this: the bone heals in weeks. The head takes longer.
If you broke your collarbone in a crash, you now have a very specific and very vivid memory associated with riding a bicycle. Your amygdala has filed that memory under “actually dangerous.” And the next time you're in a similar situation — a group ride, a descent, a wet corner, a car passing close — your nervous system will fire a warning that feels indistinguishable from genuine danger.
This is not weakness. This is not you losing your nerve. This is a neurological protection response, and it's doing exactly what it's designed to do.
The evidence-based approach is graded exposure:
- Turbo trainer — zero crash risk, full control. This is where you rebuild the association between being on a bike and being safe.
- Solo rides on quiet, familiar roads — low traffic, no group dynamics, your pace, your line choices.
- Rides with one or two trusted mates — reintroducing close proximity to other riders in a controlled way.
- Group rides and the specific conditions of your crash — this is the final stage. Wet roads if you crashed in the wet. Descents if you crashed descending. The exact roundabout, if you can manage it.
Each stage should end with you feeling in control. If a stage triggers anxiety that doesn't settle, spend more time there. There's no deadline. The only bad outcome is forcing yourself into a situation that reinforces the fear rather than resolving it.
Some riders find this process takes a few weeks. Some take months. A small number benefit from a few sessions with a sports psychologist. All of this is normal.
Bone health: the problem hiding underneath
Here's where it gets really interesting for cyclists specifically. Cycling is a non-weight-bearing sport. You sit. The bike supports your weight. Your bones don't get the mechanical loading signal that triggers bone density maintenance.
Research from Dr Jordi Vilardaga and others has consistently shown that competitive cyclists — particularly those who train exclusively on the bike — have lower bone mineral density than age-matched controls. In some studies, up to 40% of male road cyclists have osteopenia (low bone density) at the hip or lumbar spine. For masters cyclists over 40, this compounds with the natural age-related decline in bone density.
A clavicle fracture from a relatively low-energy crash may be the first sign that your bones aren't as strong as you assume. If you're over 40 and you've broken a bone from a standing-height fall or low-speed crash, ask your GP for a DEXA scan. It takes ten minutes. It's non-invasive. And the result either reassures you or gives you information you need.
If bone density is low, the fix is straightforward: weight-bearing exercise 2-3 times per week alongside your cycling. Walking, running, resistance training with dumbbells and bodyweight — anything where your skeleton bears load. This isn't about replacing cycling. It's about supplementing it with what your bones actually need.
Nutrition for bone healing
Your body is building new bone. It needs the raw materials.
Calcium: 1,000-1,200mg daily. Dairy is the most bioavailable source. If you're avoiding dairy, fortified plant milks, tinned sardines with bones, and dark leafy greens (kale, broccoli, bok choy) contribute. A calcium supplement is reasonable during fracture healing if dietary intake is low.
Vitamin D: 1,000-2,000 IU daily during healing. Vitamin D is essential for calcium absorption. If you live in the UK or Ireland, you're almost certainly deficient between October and March, and possibly year-round. Get your level checked — a simple blood test — and supplement accordingly.
Protein: 1.6-2.0g per kilogram of bodyweight daily. Bone healing is protein-intensive. Collagen synthesis — the framework that mineralises into new bone — requires adequate amino acid supply. For a 75kg rider, that's 120-150g of protein per day. This is significantly more than most cyclists eat without deliberate effort.
Vitamin C: 500mg daily supports collagen synthesis. A couple of oranges and a handful of peppers covers it. Supplementation is fine.
Avoid: Excessive alcohol (suppresses osteoblast function), smoking (dramatically impairs fracture healing — if there was ever a reason to stop, this is it), and excessive caffeine (more than 4-5 cups of coffee daily may impair calcium absorption).
When to worry
Most clavicle fractures heal without complications. But some don't, and you need to know the warning signs.
Non-union. The fracture fails to heal. Persistent pain and movement at the fracture site beyond 3-4 months. Risk factors: smoking, diabetes, high initial displacement, inadequate rest in the early weeks. Treatment: surgery to plate the fracture and often add bone graft.
Malunion. The fracture heals in a shortened or angulated position. Common with displaced fractures treated conservatively. A small amount of shortening is cosmetic only. Significant shortening (more than 2cm) can alter shoulder mechanics, reduce overhead strength, and cause chronic discomfort. Treatment: corrective surgery (osteotomy and re-plating) if symptomatic.
Hardware irritation. After surgical fixation, the plate sits just under the skin. Rucksack straps, seatbelts, and bib straps can all press on it. Around 10-15% of people with clavicle plates eventually request removal, typically 12-18 months after the original surgery once the bone has fully remodelled.
Nerve damage. The brachial plexus runs just behind the clavicle. Numbness, tingling, or weakness in the arm or hand after a clavicle fracture needs immediate investigation. Most cases are neuropraxia (bruising of the nerve) and recover fully, but they need monitoring.
Thoracic outlet syndrome. Excess callus formation or malunion can narrow the space between the clavicle and the first rib, compressing the nerves and vessels that pass through. Symptoms: numbness in the hand, colour changes in the fingers, pain with overhead activity. Rare, but worth knowing about.
The bottom line
A broken collarbone is fixable. It's painful, it's disruptive, and it will test your patience in ways you didn't expect — particularly around week four when you feel fine and the turbo trainer is right there. But the bone heals. The shoulder comes back. The confidence returns.
The riders who recover well are the ones who get the right treatment decision early, respect the timeline, do the shoulder rehab properly, and don't skip the psychological recovery. The riders who struggle are the ones who rush back at week five, re-injure the site, and turn a two-month absence into a four-month one.
Get the imaging. Understand your fracture. Follow the protocol. Do the physio. And when you're finally back on the road, riding in a group, cornering at speed, and the fear has faded to the point where you've almost forgotten it was ever there — that's when you know you did it right.