Purpose: a) Compare the predictive potential of speed and CSAhip (Computer Science Applications accelerometer positioned on the hip) for level terrain walking METs (1 MET = VO2 of 3.5 mL·kg -1·min-1) and energy expenditure (kcal·min-1); b) cross-validate previously published CSA hip- and speed-based MET and energy expenditure prediction equations; c) measure self-paced walking speed, exercise intensity (METs) and energy expenditure in the middle aged population. Methods: Seventy-two 35- to 45-yr-old volunteers walked around a level, paved quadrangle at what they perceived to be a moderate pace. Oxygen consumption was measured using the criterion Douglas bag technique. Speed, CSAhip, heart rate, and Borg rating of perceived exertion were also monitored. Results: Speed explained 10% more variance of walking METs than CSAhip. Speed and mass explained 8% more variance of walking energy expenditure (kcal·min-1) than CSAhip and mass. The best previously published regression equations predict our walking METs and energy expenditures within 95% prediction limits of ± 0.7 METs (8) and ± 1.0 kcal·min-1 (23), respectively. Women paced themselves at a significantly higher mean speed (5.5 km·h-1) and intensity (4.1 METs) than their male counterparts (5.2 km·h-1 and 3.8 METs). Both genders expended ∼0.75 kcal·kg-1 for every kilometer of level terrain walked. Conclusion: Speed-based MET and energy expenditure predictions during level terrain walking were more accurate than those utilizing CSAhip.
|Number of pages||8|
|Journal||Medicine and Science in Sports and Exercise|
|Publication status||Published - 1 Jul 2005|
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation