PMID- 29535572
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20191120
IS  - 1303-2968 (Print)
IS  - 1303-2968 (Electronic)
IS  - 1303-2968 (Linking)
VI  - 17
IP  - 1
DP  - 2018 Mar
TI  - Exploring the Metabolic and Perceptual Correlates of Self-Selected Walking Speed 
      under Constrained and Un-Constrained Conditions.
PG  - 1-6
AB  - Mechanisms underpinning self-selected walking speed (SSWS) are poorly understood. 
      The present study investigated the extent to which SSWS is related to metabolism, 
      energy cost, and/or perceptual parameters during both normal and artificially 
      constrained walking. Fourteen participants with no pathology affecting gait were 
      tested under standard conditions. Subjects walked on a motorized treadmill at 
      speeds derived from their SSWS as a continuous protocol. RPE scores (CR10) and 
      expired air to calculate energy cost (J.kg(-1).m(-1)) and carbohydrate (CHO) 
      oxidation rate (J.kg(-1).min(-1)) were collected during minutes 3-4 at each 
      speed. Eight individuals were re-tested under the same conditions within one week 
      with a hip and knee-brace to immobilize their right leg. Deflection in RPE scores 
      (CR10) and CHO oxidation rate (J.kg(-1).min(-1)) were not related to SSWS (five 
      and three people had deflections in the defined range of SSWS in constrained and 
      unconstrained conditions, respectively) (p > 0.05). Constrained walking elicited 
      a higher energy cost (J.kg(-1).m(-1)) and slower SSWS (p < 0.05) versus normal 
      walking. RPE (CR10) was not significantly different between walking conditions or 
      at SSWS (p > 0.05). SSWS did not occur at a minimum energy cost (J.kg(-1).m(-1)) 
      in either condition, however, the size of the minimum energy cost to SSWS 
      disparity was the same (Froude Fr = 0.09) in both conditions (p = 0.36). 
      Perceptions of exertion can modify walking patterns and therefore SSWS and 
      metabolism/ energy cost are not directly related. Strategies which minimize 
      perceived exertion may enable faster walking in people with altered gait as our 
      findings indicate they should self-optimize to the same extent under different 
      conditions.
FAU - Godsiff, David T
AU  - Godsiff DT
AD  - Oxford Brookes University, Gipsy Lane, Headington, Oxford, UK.
FAU - Coe, Shelly
AU  - Coe S
AD  - Oxford Brookes University, Gipsy Lane, Headington, Oxford, UK.
FAU - Elsworth-Edelsten, Charlotte
AU  - Elsworth-Edelsten C
AD  - Sport and Exercise Science, School of Human & Life Sciences, Canterbury Christ 
      Church University, Canterbury, Kent, UK.
FAU - Collett, Johnny
AU  - Collett J
AD  - Oxford Brookes University, Gipsy Lane, Headington, Oxford, UK.
FAU - Howells, Ken
AU  - Howells K
AD  - Oxford Brookes University, Gipsy Lane, Headington, Oxford, UK.
FAU - Morris, Martyn
AU  - Morris M
AD  - Oxford Brookes University, Gipsy Lane, Headington, Oxford, UK.
FAU - Dawes, Helen
AU  - Dawes H
AD  - Oxford Brookes University, Gipsy Lane, Headington, Oxford, UK.
LA  - eng
PT  - Journal Article
DEP - 20180301
PL  - Turkey
TA  - J Sports Sci Med
JT  - Journal of sports science & medicine
JID - 101174629
PMC - PMC5844194
OTO - NOTNLM
OT  - Froude
OT  - Self-selected walking speed
OT  - energy cost
EDAT- 2018/03/15 06:00
MHDA- 2018/03/15 06:01
PMCR- 2018/03/01
CRDT- 2018/03/15 06:00
PHST- 2017/07/10 00:00 [received]
PHST- 2017/11/14 00:00 [accepted]
PHST- 2018/03/15 06:00 [entrez]
PHST- 2018/03/15 06:00 [pubmed]
PHST- 2018/03/15 06:01 [medline]
PHST- 2018/03/01 00:00 [pmc-release]
AID - jssm-17-01 [pii]
PST - epublish
SO  - J Sports Sci Med. 2018 Mar 1;17(1):1-6. eCollection 2018 Mar.