Buckley JG, Jones SF, Birch KM. Oxygen consumption during ambulation: comparison of using a prosthesis fitted with and without a tele-torsion device. Arch Phys Med Rehabil 2002;83:576-81. Objective: To determine the energy expenditure and subjective comfort rating of walking in transtibial amputee patients using their prosthesis fitted either with or without a tele-torsion device (TT Pylon). Design: Randomized, before-after trial. Setting: Gait laboratory. Participants: Six men, moderately active, with unilateral transtibial amputation (mean age, 39.5 [plusmn] 9.9y). Intervention: Subjects walked on a motorized treadmill using their prosthesis fitted either with (ProsWith) or without (ProsWithout) a TT Pylon. Trials were repeated with subjects walking at speeds 100%, 130%, and 160% of their [ldquo ]normal[rdquo ] pace. Main Outcome Measures: The energy expended (VO 2 ) and subjective comfort rating during each walking trial. Results: VO 2 during walking with the prosthesis fitted with the TT Pylon was 5.4% and 9.1% lower than when using the prosthesis without the TT Pylon, at the speeds 130% and 160% of normal, respectively. Findings at the speed 160% greater than normal were significant (P [lt ] .05). Two of the subjects perceived no difference in prosthetic comfort between ProsWith and ProsWithout. The other 4 subjects preferred the TT Pylon at all speeds. Conclusion: Use of a TT Pylon can significantly reduce the energy expenditure of walking at speeds above normal. [copy ] 2002 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation