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Monday
May212012

How A Bike Fit Can Address Aches And Pains

Photos provided by Victor Wang StudiosNo matter the distance you ride, you should be comfortable on your bike. If you experience pain in your neck, back, or knees - or have saddle sores or numbness - your bicycle probably doesn't fit you properly.

The 3 key areas that an experienced and qualified bike fitter will address during a fitting are feet, seat, and hands - the areas where the rider makes contact with the bike. There are a number of issues that will affect the physical relationship of rider and bike. For example, your body may be asymmetric (one leg or arm slightly longer or shorter than the other), and even the slightest imbalance can lead to pain. While it used to be true that addressing these asymmetries meant a bit of trial and error, the properly outfitted modern fit-studio has the tools (like Retul, 360 degree viewing, wedges, shims, and 2D and 3D video with motion capture), and most importantly, the experience to address the most common issues with more precision providing greater long-term results. Finally, in addition to addressing any pain or discomfort, a bike fitting will also improve your pedaling efficiency and aerodynamics, actually making you faster.

Let’s first talk about proper vs. improper positioning of the feet, seat, and hands, and how this may cause pain or discomfort for the rider.

Feet                                                                                                                            

In general, cleats should be positioned for a neutral foot. The cleat should be under the ball of the foot, and oriented so that your toe and heel point forward and in-line with the frame. The position of your cleat can have a direct effect on knee alignment, and if there is any pain in the knee a fitter should be consulted to have your positions assessed.

Shoes should be snug, but not tight. They should fit like a sock, conforming to the foot shape while able to expand a little without constriction. The arch should match your natural arch and prevent your foot from rolling inward. This fit can be achieved with insoles, inserts, or arch supports.

Pedals should be of a width (stance) that allows the foot to rest directly on top of the pedal and be fully supported. 

Saddle                                                                                    

Your bike seat should be level to support your full body weight and allow you to move around on the seat when necessary. Too much upward tilt can result in pressure points. Too much downward tilt can make you slide forward while riding and put extra pressure on your arms, hands, and knees, which can lead to injury. To adjust the seat height, wear your biking shoes and riding shorts and place your heels on the pedals. As you pedal backwards, your knees should fully extend in the down position. If your hips rock side to side the seat is too high. When you move your foot into the proper pedaling position, with the balls of your feet over the pedal, you should have a slight bend in your knees.

You can also adjust the seat forward and backward (fore and aft position). With your feet on the pedals so that the crank arms are parallel with the ground, the neutral position will put your forward knee (patella tendon) directly over the pedal axle (often referred to as KOPS).

Keep in mind that issues like saddle sores can be alleviated through proper positioning, but may also be an issue with the saddle shape, clothing or another issue. These can and should be addressed in a fitting session.

Handlebars 

The location of your handlebars can cause multiple issues. Handlebars may be too high, low, close, or far away. If so, you can have pain, strain, soreness, excessive tightness (or all of the above) in the neck, shoulder, back, and hands.

Unlike a saddle, there is no hard and fast “rule” that tells you where to set the handlebars up, as too many variables are employed in the final location. Variables like frame geometry, usages, style of bike, experience of rider, flexibility, components, and so on all play a part in the final handlebar location. The one constant is that the handlebar’s position should be properly set up relative to the saddle, and this must be addressed first no matter which bike we are talking about.

A generic rule of thumb to cover multiple bike styles and handlebar configurations is that a proper reach (distance to the handlebar from the seat) allows you to comfortably use all the positions the handlebars provide, and to comfortably bend your elbows while riding. To properly support your upper body, the handlebars must also be the proper width for your shoulders and placed at an appropriate height. Too high and you will increase lower back issues, too low and neck/shoulder issues will arise. For all bikes, handlebars come in a variety of shapes and sizes, and a good bike fitter will have multiple varieties to test in order to determine your appropriate shape.

Now let’s talk about some common aches and pains that cyclists have, and how these may be addressed by a bike fit or technique.

Knee pain is most commonly associated with saddle position. A saddle that is too high or low, too far forward or back, can cause issues. Improper bike shoe or cleat position can also cause knee pain. 

  • A seat that is too high will cause hip rocking and pain in the back of the knee. 
  • A seat that is too low or too far forward may cause pain in the front of the knee. 
  • Improper foot position on the pedal (or improper cleat alignment) can cause pain on the inside or outside of your knees.

Individual anatomy may also result in knee pain. Cyclists with slight differences in leg length may have knee pain because the seat height is only adjusted for one side. Shoe inserts, wedges, shims or orthotics can address this problem. Another common cause of knee pain is using too high a gear (mashing). Reducing the gear and increasing the cadence will reduce the stress on the knee.

Neck pain is usually the result of riding a bike that is too long, or having handlebars that are too low. Check for signs like high shoulders, straight (not bent) elbows and craning of the neck. Handlebar width also plays a big role. Bars that are too wide will cause pressure in the upper back between the shoulder blades, while bars that are too narrow or extended will cause forward rounding of the shoulders. Tight hamstring and hip flexor muscles may cause neck pain by forcing your spine to round or arch, as well as cause a hyper-extended neck. Improper saddle position can create these problems as well.

Foot pain or numbness is most commonly addressed by proper footwear. Issues such as hot foot, numbness and arch pain can be addressed through cleat positioning, insoles, orthotics, shoe tightness (width or over clamping), and pedal choice. Pedaling technique and gear choice also play a role in foot pressure.

Hand pain or numbness can be alleviated or lessened by wearing padded cycling gloves. Riding with your elbows slightly bent, not straight or locked, is always a key. Bent elbows act as shock absorbers and help absorb the bumps in the road, they also serve to relax the shoulders and neck area. Changing hand positions frequently on the handlebars can also reduce pressure and pain. Finally, check your component positioning. Brake and shift levers should be positioned in comfortable alignment of your wrists, with the proper reach to work the controls.

Understanding that the pain described above is not normal and can be addressed with a proper bike fit is the first step in getting faster on the bike. The old adage of “no pain, no gain” does not apply in the context of bike fit and cycling. Address issues like numbness and pain and you’ll be motivated to ride further - your performances will reflect your hard work!

Philip Casanta (USAC Level II Coach) is the lead bike fitter at Hypercat Racing, based in Ventura, CA. Phil has been helping athletes optimize their bike fits for over 20 years. Phil works extensively with triathlon, time trial, road, mountain and cyclocross athletes. Retul and F.I.S.T certified, Phil’s expertise combines experience with art and science to produce the optimal fit for athletes based on their individual needs, biomechanics and athletic pursuits. Learn more at www.hypercat.com.

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