Prediction of peak oxygen consumption from the ratings of perceived exertion during a graded exercise test and ramp exercise test in able-bodied participants and paraplegic persons.

摘要

OBJECTIVE: To assess the accuracy of predicting peak oxygen consumption (Vo(2)peak) from a graded exercise test (GXT) and a ramp exercise test during arm exercise in able-bodied persons and persons with paraplegia using ratings of perceived exertion (RPEs). DESIGN: Each participant performed a GXT (started at 30W and increased by 15W every 2min) and a ramp exercise test (started at 0W and increased by 15W.min(-1)). SETTING: Universities' laboratories. PARTICIPANTS: Able-bodied men (n=13; mean +/- SD, 27.2+/-4.3y) and men with paraplegia (n=12; 31.1+/-5.7y). Six of the persons with paraplegia had flaccid paralysis as a result of poliomyelitis infection. The other 6 persons had complete spinal cord injuries with neurologic levels at and below T6. INTERVENTION: Not applicable. MAIN OUTCOME MEASURES: Prediction of Vo(2)peak by extrapolating submaximal oxygen consumption (Vo(2)) and RPE values to RPE 20 on the Borg 6 to 20 RPE scale. RESULTS: This study showed a very strong linear relationship between RPE and Vo(2) during the GXT and the ramp test for able-bodied persons (R(2)>/=.95 and R(2)>/=.96, respectively) and persons with paraplegia (R(2)>/=.96 and R(2)>/=.95, respectively). There was no significant difference between measured and predicted Vo(2)peak from RPEs before and including RPE 13, 15, and 17 during the GXT for persons with paraplegia (P>.05). For the able-bodied participants, there was no significant difference between measured and predicted Vo(2)peak from RPEs before and including RPE 15 and 17 during the ramp exercise test (P>.05). CONCLUSION: The GXT provided acceptable predictions of Vo(2)peak for persons with paraplegia, and the ramp test provided acceptable predictions of Vo(2)peak for able-bodied persons.