ORCID Profile
0000-0001-6027-1732
Current Organisation
University of North Carolina at Chapel Hill
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Publisher: Elsevier BV
Date: 10-2018
DOI: 10.1016/J.GAITPOST.2018.09.006
Abstract: Step length and cadence (i.e., step frequency or steps/minute) maintain an invariant proportion across a range of walking speeds, known as the walk ratio (WR = step length/cadence). While step length is a difficult parameter to manipulate, cadence is readily modifiable using rhythmic auditory cuing (RAC e.g., synchronizing step timing to a metronome or music tempo). The purpose of this study was to determine the effects of RAC-guided cadences on enacted cadence, step length, WR, and gait speed during overground walking. Sixteen healthy young adults repeatedly crossed a GAITRite electronic walkway while attempting to synchronize step timing to RAC-guided (metronome) tempos of 80 to 140 beats per minute. Mean absolute percent error (MAPE) was used to compare RAC tempos to enacted cadence. Repeated-measures analyses of variance were performed to test for the effects of RAC on cadence, step length, WR, and gait speed. Moreover, simple linear regressions were used to determine the precise stepwise relationship between RAC conditions and each variable. Participants successfully matched their cadence to RAC beats (MAPE < 1.1%). Cadence increased proportionally to RAC (linear regression slope = 1.02), while step length also increased but at a slower rate (slope = 0.40). These dissimilar slopes resulted in a modified WR that systematically decreased with increasing cadence, although ultimately gait speed increased with increasing cadence (slope = 1.41). This relationship indicates that every 10 steps/minute incremental increase in cadence corresponded with a 14 cm/s increase in gait speed. Gait speed appears to increase in a predictable manner when cadence is guided by RAC during overground walking irrespective of apparent changes to the WR.
Publisher: Public Library of Science (PLoS)
Date: 02-08-2019
Publisher: Wiley
Date: 29-11-2022
DOI: 10.1111/SMS.14274
Abstract: Walking cadence (steps/min) has emerged as a valid proxy of physical activity intensity, with consensus across numerous laboratory‐based treadmill studies that ≥100 steps/min approximates absolutely defined moderate intensity (≥3 metabolic equivalents METs). We recently reported that this cadence threshold had a classification accuracy of 73.3% for identifying moderate intensity during preferred pace overground walking in young adults. The purpose of this study was to evaluate and compare the performance of a cadence threshold of ≥100 steps/min for correctly classifying moderate intensity during overground walking in middle‐ and older‐aged adults. Participants ( N = 174, 48.3% female, 41–85 years of age) completed laboratory‐based cross‐sectional study involving an indoor 5‐min overground walking trial at their preferred pace. Steps were manually counted and converted to cadence (total steps/5 min). Intensity was measured using indirect calorimetry and expressed as METs. Classification accuracy (sensitivity, specificity, accuracy) of a cadence threshold of ≥100 steps/min to identify in iduals walking at ≥3 METs was calculated. The ≥100 steps/min threshold demonstrated accuracy of 74.7% for classifying moderate intensity. When comparing middle‐ vs. older‐aged adults, similar accuracy (73.4% vs. 75.8%, respectively) and specificity (33.3% vs. 34.5%) were observed. Sensitivity was high, but was lower for middle‐ vs. older‐aged adults (85.2% vs. 93.9%, respectively). A cadence threshold of ≥100 steps/min accurately identified moderate‐intensity overground walking. Furthermore, accuracy was similar when comparing middle‐ and older‐aged adults. These findings extend our previous analysis in younger adults and confirm the appropriateness of applying this cadence threshold across the adult lifespan.
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 10-2018
Publisher: Springer Science and Business Media LLC
Date: 17-01-2019
Publisher: Informa UK Limited
Date: 29-11-2019
Publisher: Informa UK Limited
Date: 30-12-2020
Location: United States of America
Location: United States of America
No related grants have been discovered for Christopher Moore.