TY - JOUR
T1 - Pedometer-determined step count guidelines for classifying walking intensity in a young ostensibly healthy population
AU - Tudor-Locke, Catrine
AU - Sisson, Susan B.
AU - Collova, Tracy
AU - Lee, Sarah M.
AU - Swan, Pamela
PY - 2005/12
Y1 - 2005/12
N2 - Purpose: (a) To establish pedometer steps/min intensity categories (i.e., light, moderate, hard, very hard) for adults under controlled conditions, and (b) use these cut-points to ascertain the number of steps expected in 30 minutes of moderate intensity activity. Methods: 25 men and 25 women, ages 18-39 years, performed 6-min exercise bouts at 3 treadmill speeds (4.8, 6.4, and 9.7 km/hr). Yamax SW-200 pedometers indicated steps, and steady-state V̇O2 was recorded. METs were calculated by dividing steady-state V̇O2 by 3.5 ml·kg-1 ·min-1. Linear regression was used to quantify the relationships between steps/min and METs across all speeds. Ten participants (5 M, 5 F) were randomly selected from the original 50 and constituted a holdout sample for cross-validation purposes (i.e, comparing actual and predicted METs; paired t-test). Results: The regression equation for males was: METs = -7.065 + (0.105*steps/min) r2 = 0.803. For females it was: METs = -8.805 + (0.110 * steps/min) r2 = 0.830. Cross-validation was confirmed. Conclusions: Pedometer cut-points corresponding to minimal moderate intensity walking were 96 steps/min in men and 107 steps/min in women, or roughly 100 steps/min for both. This translates to approximately 3,000 steps in 30 min of moderate-intensity ambulatory activity for both genders.
AB - Purpose: (a) To establish pedometer steps/min intensity categories (i.e., light, moderate, hard, very hard) for adults under controlled conditions, and (b) use these cut-points to ascertain the number of steps expected in 30 minutes of moderate intensity activity. Methods: 25 men and 25 women, ages 18-39 years, performed 6-min exercise bouts at 3 treadmill speeds (4.8, 6.4, and 9.7 km/hr). Yamax SW-200 pedometers indicated steps, and steady-state V̇O2 was recorded. METs were calculated by dividing steady-state V̇O2 by 3.5 ml·kg-1 ·min-1. Linear regression was used to quantify the relationships between steps/min and METs across all speeds. Ten participants (5 M, 5 F) were randomly selected from the original 50 and constituted a holdout sample for cross-validation purposes (i.e, comparing actual and predicted METs; paired t-test). Results: The regression equation for males was: METs = -7.065 + (0.105*steps/min) r2 = 0.803. For females it was: METs = -8.805 + (0.110 * steps/min) r2 = 0.830. Cross-validation was confirmed. Conclusions: Pedometer cut-points corresponding to minimal moderate intensity walking were 96 steps/min in men and 107 steps/min in women, or roughly 100 steps/min for both. This translates to approximately 3,000 steps in 30 min of moderate-intensity ambulatory activity for both genders.
KW - Exercise
KW - Motion sensor
KW - Outcome assessment
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U2 - 10.1139/h05-147
DO - 10.1139/h05-147
M3 - Article
C2 - 16485518
AN - SCOPUS:33644868448
SN - 1066-7814
VL - 30
SP - 666
EP - 676
JO - Canadian Journal of Applied Physiology
JF - Canadian Journal of Applied Physiology
IS - 6
ER -