Fatigue Induced by Overground Wheelchair Propulsion in Persons With a Spinal Cord Injury: Upper Limb Saving or Straining?

The figure 8 protocol (fatigue intervention) requires the participants to propel three times as many laps as possible for four minutes each with their wheelchair. The protocol has been developed and used previously. Every bout of four minutes is separated by 90 seconds of rest. Each lap consists of a right and left turn and two complete stops after half a lap. Measurements during the protocol include the Rate of Perceived Exertion (RPE) scale, heart rate, and propulsion kinetics.