Physiology of wheelchair racing with a spinal cord injury
Capacity is reduced across metabolic, cardiorespiratory, neuromuscular and thermoregulatory systems, but aerobic/anaerobic power does not map onto racing performance as cleanly as in able-bodied sport
Key Findings
Athletes with an SCI have unique changes in metabolic, cardiorespiratory, neuromuscular and thermoregulatory systems that reduce overall physiological capacity relative to able-bodied athletes and to athletes with other impairments. The review covers the ISMGF classification, the methods used to characterise anaerobic and aerobic fitness, the physiological studies of racing performance, heat-regulation risks and special conditions.
Limited research links sprint or distance racing performance to anaerobic and aerobic fitness. Descriptive profiles reflect the athletes' training and events, but the association between physiological profile and real or simulated racing performance is unclear — the assumption that high aerobic and anaerobic power strongly correlate with endurance and sprint racing performance, respectively, is not necessarily true in this population.
Thermoregulation is impaired (autonomic and somatic disruption of skin blood flow and sweating below the lesion), so hyperthermia risk in distance racing is higher; athletes should follow the heat-stress precautions recommended for able-bodied athletes.
"Boosting" — voluntarily inducing autonomic dysreflexia — improved simulated marathon performance time by 10% in elite racers with quadriplegia through increased oxygen utilisation, but it is dangerous and banned by the IPC.
Anti-gravity suits (lower-body positive pressure) raise peak oxygen uptake, cardiac output and stroke volume; abdominal binders do not; neither has been shown to change racing performance.
From the review body (full text; not checked against the abstract): peak VO2 declines with higher lesion level (paraplegia > tetraplegia), high lesions blunt cardiac sympathetic drive (lower peak heart rate, stroke volume and cardiac output), hand-rim propulsion has low gross mechanical efficiency, and the shoulder is the main overuse site.
Practical Application
This review says SCI reduces capacity across every system, yet published profiles do not tie aerobic or anaerobic power cleanly to wheelchair racing results — so calibrate zones and targets to the athlete's own tested values and race trends, never to able-bodied norms or to a lab number alone.
Treat heat as a primary risk in distance events: follow able-bodied heat-stress precautions as a floor and add cooling (REF-634).
Higher-lesion athletes: respect a blunted cardiovascular and thermoregulatory response (review body) — use within-athlete trends rather than HR-based prescription; never facilitate boosting (REF-636). Propulsion technique/economy and shoulder care are the base's own practice priorities, not findings of this abstract.
Limitations
Narrative review dated 2002 (equipment and classification have moved on); SCI-focused; the abstract gives one performance number (boosting, +10%) and no VO2 or efficiency values — use the individual's own testing.
How this entry was checked and changed
Why this level
regraded 2026-09-27 from B: narrative review without systematic method (rubric C+)
Content correction 2026-09-27
Title/lead "upper-body aerobic capacity is the ceiling" -> the abstract says the physiology–performance association is unclear and the aerobic/anaerobic-power assumption is "not necessarily true" in this population; rewritten.
"Gross mechanical efficiency <~10%" removed (not in the abstract); lesion-level, cardiac and shoulder statements labelled as review body.
Added the abstract's own content: boosting +10% (banned), anti-gravity suits vs abdominal binders, heat-stress guidance. Level B -> C+ per the 2026-09-26 rubric (narrative review).