CoachingAnswer

HOW TO PREVENT LOWER BACK PAIN WHEN CYCLING?

By Anthony WalshRoadman CyclingUpdated 10 July 2026

ANSWER

Lower back pain during cycling is caused by excessive lumbar flexion from a reach that is too long, a saddle that is too high, or a core too weak to stabilise the pelvis under load. Research by Burnett et al. found that 58% of competitive cyclists report lower back pain, with trunk flexion angle and ride duration as the strongest predictors. Shortening reach by 10-20 mm, reducing saddle height by 5-10 mm if the pelvis rocks at the bottom of the pedal stroke, and performing targeted core stability work three times per week prevents onset in most riders.

KEY TAKEAWAYS

Excessive reach and saddle height force the lumbar spine into sustained flexion, the primary mechanical cause of cycling back pain.
58% of competitive cyclists report lower back pain — it is common but not inevitable.
Core stability work three times per week reduces back pain incidence significantly.
A professional bike fit that addresses stack, reach, and saddle setback resolves positioning-related pain in most cases.

WHO THIS IS FOR

IS THIS YOU?

The rider with post-ride stiffness

Your back feels fine on the bike but stiffens up within an hour of finishing, especially after rides over 90 minutes.

The desk-bound cyclist

You sit at a desk all day and your hip flexors are tight, making it harder to hold a comfortable position on the bike.

The masters rider

You are over 40 and your back tolerates less than it used to, especially on long or intense rides.

THE ROADMAN VIEW

Lower back pain is the second most common complaint we hear after saddle discomfort. The pattern is almost always the same: a rider copies a position they saw on a pro bike, ends up with too much reach and too little stack, and their lumbar spine takes the punishment. Your back is not meant to be a structural beam holding your torso in a flat aero position for four hours.

The fix is usually straightforward. Raise the bars 10-20 mm or shorten the stem by one size. Most amateur riders have no business riding with a 140 mm drop from saddle to bars — that requires exceptional hamstring flexibility and core strength that takes years to develop.

Then address the core. Not crunches — stabilisation work. Dead bugs, pallof presses, side planks, bird dogs. Your core is what holds your pelvis still while your legs produce power. When the core fatigues, the pelvis rocks, the lumbar spine absorbs the movement, and pain follows. Three sessions per week, 15 minutes each, solves it for most riders within six to eight weeks.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Dr Angus BurnettSpinal biomechanics researcher, Murdoch University
A study of competitive cyclists found that 58% reported lower back pain. Trunk flexion angle and ride duration were the strongest predictors. Riders with greater lumbar flexion relative to their available range showed higher pain incidence, suggesting that position should be set within each individual's flexibility limits rather than to an arbitrary aerodynamic target.
Phil BurtFormer Head of Physiotherapy, British Cycling
The majority of cycling-related lower back pain resolves with three interventions: reducing reach to keep lumbar flexion within the rider's comfortable range, building core stability to maintain pelvic control under fatigue, and managing training load so that long rides increase gradually rather than in sudden jumps.

PRACTICAL APPLICATION

DO THIS WEEK

Test your reach with a plumb line
In your riding position, drop a plumb line from the tip of your nose. It should fall roughly over or just behind the centre of the handlebars. If it falls well ahead, your reach is too long. A shorter stem or raising the bars will reduce lumbar flexion.
Check for pelvic rocking at the bottom of the pedal stroke
Have someone film you from behind while riding on a trainer. If your hips drop side to side at the bottom of each pedal stroke, your saddle is too high. Lower it by 3-5 mm and recheck.
Add 15 minutes of core stability work three times per week
Dead bugs (3 x 10 each side), side planks (3 x 30 seconds each side), pallof presses (3 x 10 each side), and bird dogs (3 x 10 each side). No sit-ups — they train flexion, which is the problem, not the solution.
Increase long ride duration by no more than 15% per week
Your spinal stabilisers fatigue over duration. If your longest ride last month was 90 minutes, do not jump to three hours. Build up over four to six weeks so the muscles around your spine can adapt to the loading.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKESlamming the stem to copy a professional position.
FIXProfessional riders have years of progressive adaptation, elite flexibility, and hours of daily core work supporting their position. Set your position for your body, not theirs.
MISTAKEStretching the hamstrings without strengthening the core.
FIXTight hamstrings pull the pelvis into posterior tilt, but stretching alone does not fix the root cause. Combine hamstring mobility with core stability and hip flexor stretching for a balanced approach.
MISTAKEIgnoring bike fit and blaming 'a bad back'.
FIXMost cycling-related back pain is mechanical — caused by position. A professional bike fit is the single most effective intervention and resolves the problem for the majority of riders.

FAQ

FREQUENTLY ASKED QUESTIONS

Is cycling bad for your back?

No. Cycling is a low-impact activity that, with a correct position, places less spinal load than running or contact sports. Back pain from cycling is almost always a position or conditioning issue, not an inherent consequence of the activity.

Should I ride through lower back pain?

Mild stiffness that resolves within an hour of finishing is usually muscular fatigue and safe to ride through. Sharp pain, pain that worsens during the ride, or pain that radiates into the legs warrants stopping and seeing a physiotherapist before resuming.

Do core exercises really help cycling back pain?

Yes. Research consistently shows that core stabilisation programmes reduce lower back pain incidence in cyclists. The core holds the pelvis stable while the legs produce force — when it fatigues, the lumbar spine takes over as a stabiliser, which it is not designed to do.

How long does it take for back pain to resolve after a bike fit?

Most riders notice improvement within two to four weeks if the fit addresses the mechanical cause. Complete resolution typically takes six to eight weeks as muscles adapt to the new position.

Does a shorter stem help with back pain?

A shorter stem reduces reach, which reduces lumbar flexion. Going 10-20 mm shorter is often enough to bring the spine within a comfortable range without compromising handling significantly.

Should I use a more upright riding position?

A more upright position reduces spinal flexion and is appropriate if your flexibility or core strength does not support a lower position. Performance loss from a slightly higher front end is minimal for most amateur riders and vastly outweighed by being able to ride pain-free.