title: Effect of treadmill and overground walking on function and attitudes in older adults.
abstract: OBJECTIVE
  The purpose of this study was to determine whether treadmill walking, as a mode of physical activity for older adults, was comparable with overground walking when considering 1) spatiotemporal gait characteristics (walking velocity, stride length, and stride rate) at a preferred velocity and a prescribed intensity typical of many exercise prescriptions (i.e., RPE of 13); and 2) the effects on physical function (short physical performance battery (SPPB), lateral mobility, 400-m walk) and participants' attitude towards training and level of enjoyment.
  
  
  METHODS
  Gait characteristics were measured at each participant's preferred and RPE 13 velocity during treadmill and overground walking (N=23, 74+/-4 yr). Participants were then randomized to either a treadmill or overground progressive intensity and duration walking program of 18 sessions.
  
  
  RESULTS
  Both the preferred and RPE 13 walking velocities were significantly slower on the treadmill compared with overground (t(22)=-10.87, P<0.001 and t(22)=-8.54, P<0.001, respectively), as a result of significantly shorter stride lengths and slower stride rates. After training, there were no differences between the groups for RPE 13 velocity, SPPB or lateral mobility. However, following the intervention, the overground group completed the 400-m walk faster (F(1,15)=6.06, P<0.05), had a more favorable attitude towards training, and expressed a more favorable level of enjoyment about the training program than the treadmill group (F(1,16)=7.5; P<0.05).
  
  
  CONCLUSIONS
  An overground walking program appears to offer some advantages over a treadmill walking program in older adults. Using RPE alone to regulate intensity may reduce the benefits of a treadmill walking program in older adults.
authors.affiliation: Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC 27109-7868, USA. marshap@wfu.edu
authors.forename: Anthony P
authors.initials: AP
authors.lastname: Marsh
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Katula
authors.forename: Christina F
authors.initials: CF
authors.lastname: Pacchia
authors.forename: Lara C
authors.initials: LC
authors.lastname: Johnson
authors.forename: Kenneth L
authors.initials: KL
authors.lastname: Koury
authors.forename: W Jack
authors.initials: WJ
authors.lastname: Rejeski
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001290:Attitude; D004777:Environment; D005081:Exercise Therapy; D005260:Female; D005684:Gait / Q000502:physiology; D006240:Happiness; D006801:Humans; D008297:Male; D010809:Physical Fitness / Q000502:physiology; D004856:Postural Balance / Q000502:physiology; D013997:Time Factors; D016138:Walking / Q000502:physiology* / Q000523:psychology