Amputees in Endurance Sports: Prosthetic Technology, Common Challenges, and a Step-by-Step Training Approach

Preface: Amputation Is Not the End of Sport

Amputation is a major event that fundamentally changes daily life and how the body is used, but with advances in prosthetic technology and sports medicine, more and more amputees are regaining the ability to ride, run, and participate in endurance sports—some even reaching remarkably high competitive levels. This path is not easy; it requires addressing prosthetic fitting, skin care, psychological adjustment, and gradual physical rebuilding, but these challenges all have systematic knowledge to draw upon.

This article will begin with the basic evolutionary context of prosthetic technology, explain the common practical challenges amputees face when engaging in endurance sports, and provide a step-by-step training framework. It must be emphasized that every amputee’s amputation site (upper/lower limb), amputation level (e.g., below-knee, above-knee, hip disarticulation), residual limb condition, and comorbidities (such as diabetes or peripheral vascular disease) are different. What this article provides is a general knowledge framework. Actual prosthetic fitting, training intensity, and exercise prescriptions must be evaluated and adjusted jointly by the amputee together with a professional team including rehabilitation physicians, physical therapists, and prosthetists—this content alone should not be used for self-directed practice.

I. The Evolution of Prosthetic Technology: From Functional Replacement to Sport-Specific Design

1. Directions of Basic Structural Evolution

The development of modern prosthetics has been advancing in several directions:

• Material lightweighting: From the heavier materials of earlier eras to the widespread use of high-strength, lightweight materials such as carbon fiber, significantly reducing the extra burden on amputees during prolonged wear and activity.
• Refinement of socket fitting technology: The socket is the core component connecting the residual limb to the prosthesis, directly affecting wearing comfort and force transmission efficiency. Advances in vacuum-assisted suspension systems, silicone liners, and other technologies have markedly improved the fit and stability between the socket and the residual limb, while also helping to reduce friction and slippage during wear.
• Intelligent joint mechanisms: Lower-limb prostheses (especially the knee joints used by above-knee amputees) have evolved from purely mechanical structures to intelligent knee joints with sensing and adjustment capabilities, which can adjust damping in real time based on the user’s gait and terrain changes, improving stability and naturalness during walking and exercise.
• Divergence of sport-specific prostheses: General daily-use prostheses and those designed specifically for sports such as running or cycling have clearly diverged in design philosophy. For example, the well-known “blade” running prostheses (sport-specific elastic feet), through their special elastic materials and shapes, provide energy storage and release during the ground-contact and propulsion phases of running, similar to the human Achilles tendon. These are devices specifically designed for running and have different design goals from daily walking prostheses.

2. Specific Demands of Cycling on Prostheses

Because cycling primarily involves force output through the circular motion of pedaling, the interface design between the prosthesis and the pedal or clipless pedal system is critical for amputees. Some amputee cyclists use specially designed pedal adapter interfaces, or knee and ankle joint settings on their prostheses that have been adjusted for the cycling motion, allowing smoother and more cycling-specific force transmission rather than simply using their daily walking prosthesis configuration to push pedals. Upper-limb amputees who choose to continue road cycling may need customized adjustments to the brake lever and shifter interfaces to ensure that braking and shifting can be performed safely and reliably with one hand or a prosthetic hand.

II. Common Practical Challenges

1. Skin Friction and Residual Limb Fit Issues

This is one of the most common challenges amputees face when participating in sports, and one that requires long-term attention. Continuous friction and compression between the residual limb and the socket, combined with the moist environment caused by sweating during exercise, can easily lead to skin breakdown, blisters, or even more serious skin infections. Common countermeasures include:

• Choosing appropriate residual limb socks or liners: Using moisture-wicking materials to reduce friction and heat buildup, and adjusting sock thickness according to the day’s residual limb swelling to maintain socket fit.
• Carefully checking skin condition before and after exercise: Developing the habit of inspecting the residual limb skin after each workout to detect redness, chafing, or other warning signs early, preventing minor issues from becoming major problems that require stopping exercise or even medical treatment.
• Residual limb volume changes over time and with physical condition: Factors such as hot weather, hydration status, and even different times of day can cause changes in residual limb swelling, which in turn affects socket fit. This is why many amputees keep socks of different thicknesses on hand.
• Exercise intensity and duration should increase gradually to allow the skin an adaptation period: Suddenly extending workout duration or raising intensity sharply increases the total friction load on the skin and residual limb. Progressing gradually to give tissues time to adapt is a key principle for reducing the incidence of skin problems.

2. Residual Limb Volume Changes and Prosthetic Refitting

Residual limb volume is not static. Especially in the first one to two years after amputation surgery, the residual limb continues to go through a process of deswelling and stabilization, and the prosthetic socket may need to be adjusted or remade accordingly. Even after reaching a relatively stable phase, exercise can cause periodic volume changes due to increased muscle mass, shifts in fluid distribution, and other factors. This means prosthetic fit needs to be regularly checked and adjusted by a professional prosthetist rather than being a one-time fitting that lasts forever. If you notice obvious loosening of the prosthesis, increased friction, or unusual pain while riding or running, you should return for adjustment rather than forcing yourself to continue using an ill-fitting prosthesis.

3. Energy Expenditure and Compensatory Load

Using a prosthesis to walk or run typically requires more energy to perform the same movements compared to a sound lower limb. This also means that amputees may need to be more conservative and build in more margin when it comes to pacing and fueling strategies in endurance sports compared to able-bodied athletes. Additionally, because a prosthesis cannot fully replicate the joint range of motion and sensory feedback of a sound limb, other parts of the body (such as the contralateral limb, lower back, and core muscles) often experience increased compensatory load. Over time, attention should be paid to whether these compensatory areas show signs of overuse soreness or injury. Appropriate strength training and stretching can help distribute these extra loads.

4. Psychological Adjustment and Rebuilding Athletic Identity

For many amputees, returning to the sports arena is not just a physical challenge—it also involves psychological readjustment, including redefining one’s body image, dealing with doubts about “can I still exercise like I used to,” and facing the gaze of others when exercising in public with a prosthesis. It is generally believed that connecting with peers who have had similar experiences, engaging with sports communities, or gradually building a new athletic identity with the support of professional psychological care can positively help maintain long-term exercise habits. However, this too varies from person to person, and there is no need to compare your pace of adjustment with others.

III. A Step-by-Step Training Approach

1. Professional Assessment Before Training Is the First Step

Before beginning any regular endurance exercise program, it is recommended that a team consisting of a rehabilitation physician, physical therapist, and prosthetist conduct a comprehensive assessment of the individual’s amputation site, residual limb condition, and comorbidity risks (for example, amputees with vascular disease need special attention to peripheral circulation status) to confirm suitable exercise types, initial intensity, and any contraindications to watch for.

2. Suggested Progressive Training Framework (For Reference Only—Adjust According to Individual Circumstances)

• Phase 1: Prosthetic adaptation and basic functional training. The focus is on confirming prosthetic fit and wearing comfort, and building a foundation through low-intensity functional movements (such as balance training and short-distance walking), without rushing into formal endurance training.
• Phase 2: Short-duration, low-intensity exercise attempts. Begin with short exercise sessions that can be stopped voluntarily (such as short flat rides or walks), closely monitoring skin condition and residual limb response. The goal of this phase is to confirm the body’s initial tolerance for exercise, not to chase distance or speed.
• Phase 3: Gradually extending exercise duration and distance. Only when the skin and residual limb are adapting well should you consider gradually increasing exercise time and beginning to establish a regular training frequency.
• Phase 4: Adding intensity variation and sport-specific technique training. Once baseline endurance and prosthetic familiarity have reached a certain level, consider adding training elements with intensity variation such as intervals and climbing, and decide based on personal goals whether to move toward specific events or competitive development.

The core principle of this framework is “better to be conservative than aggressive,” because once skin or residual limb problems occur, they often require pausing exercise to allow tissues to recover, which ultimately slows overall training progress.

4. The Relationship Between Amputation Level and Sport Selection

The site and level of amputation (the height of the amputation) directly affect the complexity of prosthetic design, the degree of energy expenditure, and the suitable types of sports. This is important background knowledge for understanding exercise prescriptions for amputees:

• Transtibial amputation: The knee joint is preserved, and the prosthesis mainly replaces the function of the lower leg and foot. Generally speaking, amputees who retain the knee joint experience a relatively smaller increase in energy expenditure during walking and exercise compared with transfemoral amputees, because the body retains full proprioception and control of the knee joint. This is also why many transtibial amputees are able to return to cycling and running relatively smoothly.
• Transfemoral amputation: Because the knee joint must also be replaced by a mechanical or microprocessor-controlled knee module in the prosthesis, the complexity of control and energy expenditure increases significantly. Walking and running require a longer learning and adaptation period, and sport selection may require more careful discussion of progressive strategies with the professional team.
• Upper-limb amputation (including various levels of the forearm and upper arm): The main impact on cycling lies in the need to adjust the control interfaces (brakes, shifting). The direct impact on running is relatively smaller, but it may still affect body balance and arm-swing rhythm while running, requiring a period of time to readapt to the running movement pattern.
• Bilateral amputation: Whether involving both lower limbs or both upper limbs, because there is no intact side to rely on for compensatory advantage, training planning usually requires a more conservative approach and closer supervision by the professional team, and the importance of individualized assessment is even higher.

There is no absolute ranking of “which amputation level is more suitable for sports.” The key is to understand the specific challenges posed by one’s own amputation level and to prepare for those challenges, rather than measuring all amputees’ athletic potential with a single standard.

5. Competitive Classification Systems and the Concept of Classification in Official Events

As with other disability sports, if amputee athletes aim to compete, the international disability sports system (including the cycling and athletics events under the Paralympic Games) has established detailed classification systems based on different amputation sites and levels of function. This ensures that athletes with similar levels of function compete within the same category, so that competition results better reflect athletes’ training and competitive ability rather than being purely limited by differences in the degree of impairment.

The existence of this classification system also demonstrates that the competitive arena for amputee athletes is a mature system with clear rules and long-term development, rather than a marginal activity attached to able-bodied sporting events. For recreational exercisers whose primary goals are health and quality of life, there is no need to study the details of classification rules from the outset. However, understanding that this system exists helps build the correct awareness that “amputees can also pursue high-level performance in sports.”

6. Phantom Limb Pain and Pain Recognition During Exercise

Many amputees experience “phantom limb sensation” or “phantom limb pain” after surgery—that is, the phenomenon of still feeling sensation or even pain in a limb that no longer exists. This is a common neurophysiological response after amputation, not a psychological effect or malingering. The significance of this phenomenon for exercise is that amputees need to learn to distinguish between “phantom limb pain” and “actual physiological pain caused by exercise posture, poor prosthetic fit, or overuse.” These two conditions require different approaches, and confusing them may delay proper treatment of prosthetic fitting issues or training load problems that genuinely need to be addressed.

It is generally recommended that if the nature, location, or triggering factors of the pain are clearly different from one’s usual pattern of phantom limb pain, or if the pain is accompanied by the aforementioned abnormal skin and circulatory signs, one should prioritize seeking medical evaluation to rule out prosthetic fitting problems or other physiological causes, rather than directly attributing it to phantom limb pain and ignoring it.

7. Considerations for the Differences Between Cycling and Running

It is worth noting that this table provides general relative comparisons. In practice, which sport is more suitable for a specific individual must still be assessed by the professional team based on the amputation site, residual limb condition, and overall health status. One should not rule out a sport solely based on impact level.

8. Medical Warning Signs Checklist

If the following situations occur when amputees participate in endurance sports, they should seek medical attention or consult a rehabilitation physician or prosthetist as soon as possible. It is not recommended to continue exercising based on one’s own judgment:

• Redness, skin breakdown, or blisters on the residual limb skin that persist without healing, or the presence of discharge, odor, or other signs of infection.
• Clearly worsening pain, abnormal pressure sensation when wearing the prosthesis, or unexplained swelling at the end of the residual limb.
• A significant increase in skin temperature or discoloration of the residual limb skin after exercise, which may be related to circulatory conditions or infection. Patients whose amputation was caused by vascular disease need to pay particular attention.
• Unexplained systemic symptoms such as dizziness, chest tightness, palpitations, or abnormal shortness of breath.
• Persistent and progressively worsening soreness in the contralateral intact limb or the lower back, which may be a warning sign of excessive compensatory loading and requires adjustment of training content or interface settings.

This article provides a general knowledge framework and training principles and cannot replace individualized medical assessment. The physical conditions, comorbidities, and recovery progress of amputees vary greatly. Any adjustment to an exercise plan should be carried out in close coordination with the professional medical team. Do not ignore the body’s warning signals in an attempt to accelerate progress.

9. Safety and Environmental Reminders

• Choose environments with flat road surfaces and low traffic volume for initial training to reduce the risk of falls or collisions due to unfamiliarity with prosthetic control.
• Taiwan’s hot and humid summer climate poses an additional challenge for amputees wearing a socket for prolonged exercise. Heat and humidity can exacerbate skin problems. It is advisable to pay attention to the timing of exercise sessions, maintain adequate hydration, and shorten the duration of individual sessions until acclimated to the climate.
• Carry spare sock liners or simple adjustment tools to accommodate changes in fit caused by residual limb volume fluctuation during exercise.
• If planning to participate in official events or long-distance challenges, it is recommended to discuss with the prosthetist in advance the prolonged wear time, climate, and terrain factors that may be encountered on race day, and prepare accordingly, rather than discovering at the event that the interface is unsuitable.

Conclusion and Action Checklist

Advances in prosthetic technology mean that amputation no longer equates to being cut off from endurance sports. However, this path must be built on the assistance of a professional team, progressive training planning, and keen awareness of one’s own body signals. Amputees who wish to return to or begin endurance sports can refer to the following steps:

1. First, work with a team consisting of a rehabilitation physician, physical therapist, and prosthetist to conduct a comprehensive assessment of one’s physical condition and suitable sport types.
2. Based on one’s goals (cycling or running), understand the corresponding prosthetic interface requirements and discuss the possibility of customized adjustments with the prosthetist.
3. Adopt a progressive training framework, starting with short duration and low intensity, and prioritize confirming the tolerance of the skin and residual limb.
4. Develop the habit of checking the residual limb skin before and after exercise to detect and address friction, skin breakdown, and other signs early.
5. Pay attention to the medical warning signs listed in this article. Any abnormality should be discussed with the professional medical team first. Do not ignore the body’s signals out of a desire to make rapid progress.

10. Advice for Family and Friends

Family, friends, and riding companions also play an important role in an amputee’s journey back into sport. The following points may help those supporting an amputee provide encouragement in a more appropriate way:

• Respect the individual’s pace; do not compare progress: Every amputee’s recovery timeline and psychological adjustment speed are different. Avoid comparing them to other amputees who “recovered faster.” Such comparisons often create pressure rather than encouragement, and can easily make the individual feel their recovery is “not good enough,” which undermines long-term motivation to stay active.
• Ask rather than assume what help is needed: For example, whether assistance is needed on hills or when getting on and off a bike—it is best to directly ask the individual about their needs and preferences rather than intervening based on your own judgment. This also respects their autonomy.
• Use language correctly; put the person before the disability: In everyday language, it is recommended to use “amputee” rather than terms that carry stigma or overemphasize the impairment. Treat the person as a whole individual rather than labeling them by their physical condition.
• When planning outings, check the accessibility of the route in advance: For example, whether rest stops are convenient for adjusting a prosthetic limb, or whether the route has suitable spots for mid-ride breaks and checking the residual limb. Planning these details in advance helps amputee companions participate in group activities with greater peace of mind.

Rediscovering the freedom of cycling or running is a journey that requires patience and professional support, but more and more people have walked this path and found their own rhythm. Whether the final choice is a leisurely cruise along a riverside bike path or a more challenging long-distance event, being able to once again feel the wind, the sweat, and the rhythm of breathing in your own way is already an achievement worth celebrating.

Related Reading

• Mobility and Flexibility Training: Maintaining Health and Efficiency for Endurance Athletes
• Cross-Training Between Running and Cycling: How to Do Both Without Injury
• Injury Prevention in Cross-Training: The Science of Multi-Sport Training to Reduce Overuse Injuries
• Joint Angle Analysis of Downhill Running Technique in Trail Running: A Quantitative Study of Knee Joint Stress