Adults with cerebral palsy classified at Gross Motor Function Classification System (GMFCS III–V) levels have severely impaired motor function and are often unable to participate in conventional exercise. This limitation contributes to symptoms including fatigue, pain, constipation, and sleep disturbance, all of which can reduce quality of life. Spasticity, low muscle mass and cognitive challenges commonly seen in this group make standard exercise challenging or impractical, creating a need for tailored activity modalities. The study aimed to determine whether supervised assisted cycling is feasible in non-ambulant adults with cerebral palsy and whether it may produce exploratory improvements in key symptoms and cycling performance.
The investigation used a within-participant design consisting of a 10-week control period followed by a 10-week exercise period of supervised assisted cycling. Assessments were completed at three time points: baseline, after the control period, and after the exercise intervention. The protocol focused on determining feasibility (attendance and tolerability), documenting physiological response during exercise, and measuring potential effects on symptoms and physical performance.
Fourteen adults with cerebral palsy who were classified GMFCS III–V took part in the study and completed both the control and exercise periods. The source reports the sample size and classification but does not provide additional demographic details, such as age distribution, sex breakdown, or comorbidities, beyond what is stated in the abstract.
The supervised exercise intervention consisted of assisted cycling sessions scheduled three times per week, each session lasting 20 minutes, for a total intervention duration of 10 weeks. The assisted cycling modality was selected to enable lower-limb cycling motion and cardiovascular engagement in participants unable to perform conventional independent cycling or ambulatory exercise. The exact device, assistance settings, and session structure are not detailed in the abstract.
Key symptom domains were assessed, including fatigue, pain, constipation, and sleep disturbance. Functional and performance measures included the Gross Motor Function Measure-88 (GMFM-88) and a timed 1-km cycle test, which recorded completion time, power output and cadence. Feasibility outcomes included session attendance and physiological response during sessions, such as heart rate change.
Median attendance during the 10-week assisted cycling period was 24/30 sessions, reflecting reasonable adherence among participants living in residential care. During exercise sessions, participants showed a cardiovascular response: median heart rate increased by 25.5 beats per minute, indicating that assisted cycling elicited a measurable physiological workload in this population.
At the group level, the study did not detect significant changes across the measured outcomes following the assisted cycling intervention. Despite the absence of group-level effects, the authors report exploratory individual-level improvements in several areas: some participants experienced reductions in pain, improvements in constipation, and increases in cycling power output during the timed 1-km test. The abstract does not provide participant-level data or quantify the magnitude of these individual changes.
Two participants experienced moderate adverse events that affected activities of daily living. The abstract states these events but does not report further detail on their nature, timing, management, or resolution. Overall, the intervention was described as generally well tolerated by the cohort.
The combination of acceptable median attendance, a measurable heart rate response, and generally good tolerability supports the feasibility of supervised assisted cycling for non-ambulant adults with cerebral palsy in a residential care context. The lack of group-level effects suggests that uniform protocols may not produce consistent benefits across a heterogeneous population with GMFCS III–V. Observed individual improvements indicate potential for benefit when interventions are tailored to participant needs or when responders are identified and targeted.
Assisted cycling is feasible and generally tolerated by non-ambulant adults with cerebral palsy. While this exploratory study did not find group-level improvements in symptoms or function, individual participants demonstrated improvements in pain, constipation, and cycling power output. Two moderate adverse events were reported, underscoring the need for careful monitoring. These findings support additional research into tailored exercise strategies, larger controlled trials, and detailed reporting on safety and responder characteristics to clarify who may benefit most from assisted cycling within this population.