The Clinical Case for Ergonomic Crutches: What the Research Says

The Crutches.com Team · 12 min read
in motion underarm crutch clinical case for ergonomics

Ask most clinicians why they prescribe a particular crutch and the honest answer is usually some version of "it's what the DME company sends." Conventional axillary crutches are the default in most US hospitals not because the literature supports them as the optimal choice, but because they're cheap, broadly available, and what most providers used during training. The choice is rarely revisited.

That status quo doesn't hold up well against the research. Decades of biomechanics, occupational injury, and rehabilitation literature have documented specific patterns of harm associated with prolonged use of conventional crutches. Patterns that aren't artifacts of poor patient compliance and that show up reliably across patient populations. The ergonomic and spring-assist crutch designs that have entered the market over the last 15 years exist because the research identified problems the conventional designs do not solve.

This post summarizes the clinical case. It's written for clinicians, not as a marketing argument, but as a synthesis of where the literature actually points. It covers the three best-documented harms of conventional crutches, the energy and gait considerations that affect recovery quality, the patient-compliance question, and what the research suggests an ergonomic alternative needs to do to clear the bar. Every figure cited is linked in the Sources section at the end.

Where the Research Is Most Settled

Three areas of harm associated with prolonged conventional crutch use are well-established in the orthopedic and rehabilitation literature. None of them are controversial within the field. All three are routinely under-discussed in patient education and almost never factored into DME prescribing decisions.

1. Upper-Extremity Load and Soft-Tissue Injury

Conventional axillary and forearm crutches concentrate body weight onto small contact areas on the palm and wrist. With each step, the weight transfer from the legs through the hands generates pressures that, over hundreds of repetitions per day, produce predictable injury patterns. The problems clinicians see most often include:

  • Median nerve irritation at the wrist, the mechanism underlying carpal tunnel symptoms, in patients loading the handgrips over extended periods
  • De Quervain's tenosynovitis and other thumb-base tendinopathies, particularly in patients gripping handles tightly to compensate for under-supported axillary crutches
  • Hand and forearm bruising, blistering, and skin breakdown, especially in elderly patients or those with thin skin
  • Wrist and hand symptoms that outlast the underlying lower-extremity recovery

These outcomes are not caused by misuse. They are caused by the design, specifically the absence of any meaningful impact-absorption between the floor strike and the hand. Every step transmits a force spike directly to the upper extremity, and the magnitude is measurable. Instrumented gait analysis of Lofstrand crutch users put peak axial crutch force at roughly 45% of body weight per crutch during reciprocal gait, rising to about 57% during swing-through, with the broader literature reporting values spanning 10% to 60% of body weight (Slavens et al., Gait & Posture, 2007). Multiplied across a daily step count, that is the cumulative load the wrist and hand are absorbing.

2. Brachial Plexus and Radial Nerve Compression ("Crutch Palsy")

This one is older and arguably better documented than the wrist literature. Axillary crutches that bear weight in the armpit, even briefly, even when patients have been told not to, produce a recognized compression syndrome commonly called "crutch palsy." The structures involved are the brachial plexus and the radial nerve, with ulnar involvement also reported (StatPearls, Crutches, National Library of Medicine). It is worth being precise about this, because the syndrome is often described in patient materials as axillary nerve injury, which is not the anatomy. Symptoms include:

  • Sensory disturbance and weakness in the affected upper extremity
  • Wrist drop in more severe cases
  • Persistent numbness or paresthesias that can outlast crutch use by weeks or months
  • In rare cases, permanent neurological deficit

The published case literature makes the timeline concrete. One report describes a 56-year-old man who used poorly fitted axillary crutches for three weeks after foot surgery and presented with bilateral wrist drop and triceps weakness. He recovered fully, but nerve function did not normalize until ten weeks after presentation. The same report cites earlier work finding that improper crutch use can produce a sevenfold increase in force on the axilla (Chang and DePold Hohler, Journal of Neurology and Neurophysiology, 2012).

The clinical guidance taught in nursing schools and PT programs is universally to avoid weight-bearing in the axilla. The clinical reality, observed in any hospital floor or post-op patient population, is that patients rest in the axilla constantly. When they're tired, when they're standing in line, when they're talking to the nurse, when they think they're using the crutches correctly but lose form for 30 seconds at a time. The instruction "don't lean into the axilla" is not a reliable safeguard.

3. Shoulder, Rotator Cuff, and Cervical-Spine Loading

Less catastrophic than crutch palsy but more common: the cumulative shoulder load of conventional crutch ambulation produces measurable upper-quarter musculoskeletal complaints in long-term users. The shoulder is being asked to do something it is not anatomically optimized for, repeatedly bear and transmit body weight at the end-range of glenohumeral mechanics.

The clearest picture of where that leads comes from an adjacent population. MRI imaging of manual wheelchair users with spinal cord injury found supraspinatus tears in 84% of shoulders and acromioclavicular joint osteoarthritis in 80%, with only 2 of 51 participants showing no pathology at all. Notably, pathology was nearly as prevalent in shoulders without pain as in shoulders with it (Arnet et al., Journal of Spinal Cord Medicine, 2021). Those are wheelchair users rather than crutch users, and the exposure is longer than a typical post-op window, but the mechanism is the same and the finding that pain is a poor screening signal is directly relevant to any patient facing months of upper-limb weight bearing.

This is the load profile the spring-assist concept was developed to address. By absorbing impact at the ground-strike phase, the upper-extremity force spike is reduced.

The Energy Expenditure Problem

Crutch walking is metabolically expensive, and the figure is worth having on hand for patient counseling. A controlled comparison of mobility devices measured oxygen uptake on standard axillary crutches at 20.26 mL/kg/min against 13.14 mL/kg/min for normal walking, a 54% increase. A knee scooter came in 16% above walking and a hands-free crutch 21% above (Hackney et al., Foot & Ankle Orthopaedics, 2022). The implications are clinically meaningful for several patient populations:

  • Older patients with cardiopulmonary comorbidities are sometimes unable to ambulate the distances they need to (to the bathroom, to PT appointments, to the kitchen) on conventional crutches without dyspnea
  • Deconditioned patients have higher baseline fatigue and lower activity tolerance, leading to less ambulation and slower recovery
  • Patients with high BMI face elevated upper-body load and elevated energy demand simultaneously, with predictably worse compliance and outcomes
  • All patients accumulate fatigue across a recovery day in ways that affect later activities, including PT participation, household activities, and sleep quality

Reducing the per-step energy cost of crutch ambulation is not a luxury feature. It expands the population of patients who can actually meet the activity targets surgeons and PTs are trying to set.

Gait Deviations and the Question of Functional Recovery

Conventional crutch use produces a characteristic compensatory gait. Short stride length, asymmetric weight transfer, shoulder elevation, and trunk lean. PTs spend substantial portions of post-op rehab trying to correct it. Some of this is unavoidable on any crutch design, but the magnitude of compensation correlates with how much the crutch design fights the patient's natural gait mechanics.

The reason this matters beyond the crutch window is that gait patterns established during recovery are stubborn. Measuring 40 athletes a full year after ACL reconstruction, one study found the involved limb still showing smaller knee angles, moments, and excursions than the uninvolved limb in every subject, including those who had passed return-to-activity criteria at six months (White, Logerstedt and Snyder-Mackler, Orthopaedic Journal of Sports Medicine, 2013). That study does not isolate crutch design as a cause. It does establish that what happens in the protected phase does not simply wash out.

Two specific patterns are worth attention. First, the crutch-induced "hiking" gait, where the patient elevates the operated leg via hip-and-pelvis hike rather than knee flexion, reinforces movement patterns that have to be unwound in PT once weight-bearing is restored. Second, the asymmetric upper-body load on conventional crutches affects trunk and pelvic stability in ways that compound for patients with concurrent lumbar pathology.

The Patient Compliance Question

There's a quiet variable in every recovery outcome that doesn't show up in the typical clinical literature: patients who hate their crutches use them less. They sit when they should be moving. They skip the gentle ambulation surgeons and PTs are recommending. They take shorter routes around the house instead of the longer ones that would build conditioning. They schedule PT sessions less aggressively because the crutch part of the appointment is unpleasant.

None of this shows up in a randomized controlled trial. All of it shows up in real-world recovery quality. We should be careful about overclaiming here, because the head-to-head patient-reported-outcome literature comparing ergonomic to conventional crutches is thinner than the biomechanics literature. What we can say is that comfort and perceived effort are plausible drivers of adherence, and that adherence is the outcome variable surgeons and PTs actually care about.

What Ergonomic Crutches Have to Do to Clear the Bar

Several products have entered the ergonomic-crutch category over the last 15 years with varying levels of biomechanical justification. From the clinical literature, the design features that map to documented harm reduction are:

  • Impact absorption at the ground strike. Cuts the peak force spike transmitted to the upper extremity. The single most clinically significant feature.
  • Symmetric weight distribution across the hand and forearm. Reduces concentrated pressure on the median nerve and thumb-base tendons.
  • No axillary contact. Eliminates the crutch-palsy mechanism entirely. Forearm-supported designs are inherently safer than axillary designs for any use longer than 1 to 2 weeks, and this is the one point where clinical reference material is explicit: axillary crutches are best for short-term use, forearm crutches are better for long-term use.
  • Lower per-step energy cost. Spring-assist designs return some of the impact energy to the next step, reducing the metabolic cost of ambulation.
  • Stable, well-distributed shoulder load. Reduces the cumulative rotator cuff and cervical-spine loading associated with extended use.
  • Patient-reported comfort. The downstream variable that drives compliance, activity tolerance, and recovery quality.

The In-Motion Pro forearm crutch was developed against this list: a spring-assist lower post, molded V-shaped forearm cuffs, angled and contoured grips, 1.8 lbs per crutch, and a 350 lb weight capacity. We're not the only product in the ergonomic crutch category, and we're not claiming exclusivity on the underlying clinical case. We are claiming that the underlying clinical case is settled enough to justify revisiting the conventional-crutch default in any practice that prescribes crutches for 4+ week use windows.

Implications for Practice

None of the above is meant to suggest that conventional crutches should never be prescribed. For acute, short-duration use (a sprained ankle being sent home from the ED, a 5-day post-op window before transition off crutches), conventional axillary crutches are fast, cheap, and adequate. The clinical case for the ergonomic alternative is specifically about prolonged use. Any procedure expected to require crutches for more than 2 to 3 weeks.

That covers a substantial share of orthopedic surgical volume. Total joint replacements, ACL reconstructions, meniscal repairs, foot and ankle surgeries with hardware, Achilles repairs, and tibial plateau fractures all routinely involve crutch protocols of several weeks or longer. For these procedures, the cumulative-load and compliance considerations point clearly enough that the prescribing question deserves to be revisited at the practice or hospital level.

Three practical questions to consider:

  • Does your DME prescribing protocol distinguish between short-duration and long-duration crutch use? Most don't.
  • Does your patient education flow include guidance on what to expect from upper-extremity load, and signs to escalate (numbness, persistent wrist pain, weakness)? Most don't.
  • Have you priced the actual cost differential between conventional and ergonomic crutches, factoring in the rotator cuff, carpal tunnel, and PT-time cost of cumulative-load complications? Most haven't.

These are not marketing questions. They are operational questions that have a meaningful clinical answer if you sit down with the literature.

A Fair Concession on the Limits of the Evidence

The strongest version of this case is what we've made above. The fair concession is that the head-to-head randomized controlled trial literature comparing ergonomic to conventional crutches across procedure types is thinner than the broader biomechanics literature suggests it should be. The harms-of-conventional-crutches research is robust. The direct comparative-effectiveness research, while consistent in direction, is smaller than what would be ideal.

A second concession, on the loading data specifically: the peak-force figures above come from a pediatric population using Lofstrand crutches, which is the best-instrumented data available but not a direct read on adult post-op patients. Treat those numbers as the shape of the problem rather than a precise prediction for any individual.

That's an honest gap. We expect the comparative literature to grow over the next decade as ergonomic crutches become more common in clinical practice. In the meantime, the indirect evidence supports a coherent case that we don't think requires waiting for a definitive RCT to act on.

The Bottom Line

Conventional axillary crutches are the default in US clinical practice not because the research supports them as the best choice, but because they're cheap and familiar. The literature on cumulative upper-extremity load, nerve compression, energy expenditure, and gait compensation points consistently toward ergonomic alternatives for any procedure with a crutch protocol longer than 2 to 3 weeks.

The clinical case is not exotic. It's the same kind of cumulative-load reasoning that has driven changes in surgical positioning, OR ergonomics, occupational health, and dozens of other domains where small per-event loads compound to clinically significant outcomes over time. The interesting question is not whether the case is sound. The interesting question is why the prescribing default has been so slow to update.

Read more about the In-Motion Pro forearm crutch →

Sources

Frequently Asked Questions (Clinician-Oriented)

Are ergonomic crutches reimbursable through Medicare/Medicaid?

In most cases yes, under the same DME HCPCS codes that cover conventional crutches, specifically the forearm crutch codes (E0117 and similar). Specific reimbursement varies by region and payer. A brief check with your DME billing team will confirm coverage for your specific patient population.

What's the typical patient adjustment period?

Most patients adjust within 1 to 2 days. The gait pattern is similar enough to conventional forearm crutches that PT-supervised fitting and a brief in-clinic walk-through is usually sufficient. Patients transitioning from conventional axillary crutches typically describe the change as immediate relief in the upper body within the first session.

Are there contraindications?

Severe upper-extremity pathology (active rotator cuff tears under acute repair, severe wrist arthritis, fresh forearm fractures) may make any forearm-supported crutch unsuitable. In those cases, a knee scooter or wheelchair may be a better fit. Cognitive or balance impairments severe enough to make any crutch unsafe are also contraindications. For most ambulatory orthopedic patients, there are no specific contraindications beyond what would apply to conventional forearm crutches.

How does the cost compare to conventional crutches?

Per-unit cost is higher than conventional axillary crutches and comparable to or slightly above conventional forearm crutches. The cost differential should be weighed against the documented incidence of upper-extremity complications and the PT-time cost of unwinding gait compensation. For most surgical practices, the breakeven case is straightforward when those downstream costs are factored in.

Where can I see the underlying research?

The primary sources for every figure in this post are listed in the Sources section above. The wider biomechanics, energy expenditure, neuropathy, and patient-reported-outcome literature on crutch use is published across orthopedic, rehabilitation, occupational health, and biomechanics journals. We're happy to share a fuller reading list with any clinician who reaches out. Contact information is on the website.

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