Based on the linked source; automatically prepared and checked against the original report.
Protocol and participants
The Infinity Test was designed for manual wheelchair users with chronic paraplegia. Participants propelled their own wheelchairs synchronously for three minutes, while researchers counted laps and measured breath-by-breath oxygen consumption with a portable metabolimeter. Seventeen participants completed both the field protocol and a laboratory arm-crank graded exercise test in the development cohort. An independent group of 11 completed the field test for external validation.
Validation findings
The field estimate did not differ significantly from laboratory VO₂peak, with a mean bias of 25 mL·min−1 and an intraclass correlation coefficient of 0.89. The model, based on laps per minute, explained 61% of development-cohort variance, with a standard error of estimate of 517 mL·min−1. External validation produced R² of 0.70 and a mean absolute error of 322 mL·min−1, or 14.8% of the cohort mean.
Practical scope
Researchers reported no fixed or proportional bias and said the protocol was well tolerated, taking less than five minutes including setup. They characterized it as feasible and ecologically valid, while proposing that its simplicity, personal-wheelchair format and open-source digital toolkit could support use in rehabilitation, performance and community settings. The record summarizes an abstract and does not establish treatment recommendations.
