We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Cadence (steps/min) and relative intensity in 61 to 85-year-olds: the CADENCE-Adults study.
- Authors
McAvoy, Cayla R.; Miller, Taavy A.; Aguiar, Elroy J.; Ducharme, Scott W.; Moore, Christopher C.; Schuna Jr., John M.; Barreira, Tiago V.; Chase, Colleen J.; Gould, Zachary R.; Amalbert-Birriel, Marcos A.; Chipkin, Stuart R.; Staudenmayer, John; Tudor-Locke, Catrine; Bucko, Agnes; Mora-Gonzalez, Jose
- Abstract
Background: We previously demonstrated that a heuristic (i.e., evidence-based, rounded yet practical) cadence threshold of ≥ 100 steps/min was associated with absolutely-defined moderate intensity physical activity (i.e., ≥ 3 metabolic equivalents [METs]) in older adults 61–85 years of age. Although it was difficult to ascertain achievement of absolutely-defined vigorous (6 METs) intensity, ≥ 130 steps/min was identified as a defensible threshold for this population. However, little evidence exists regarding cadence thresholds and relatively-defined moderate intensity indicators, including ≥ 64% heart rate [HR] maximum [HRmax = 220-age], ≥ 40% HR reserve [HRR = HRmax-HRresting], and ≥ 12 Borg Scale Rating of Perceived Exertion [RPE]; or vigorous intensity indicators including ≥ 77%HRmax, ≥ 60%HRR, and ≥ 14 RPE. Purpose: To analyze the relationship between cadence and relatively-defined physical activity intensity and identify relatively-defined moderate and vigorous heuristic cadence thresholds for older adults 61–85 years of age. Methods: Ninety-seven ostensibly healthy adults (72.7 ± 6.9 years; 49.5% women) completed up to nine 5-min treadmill walking bouts beginning at 0.5 mph (0.8 km/h) and progressing by 0.5 mph speed increments (with 2-min rest between bouts). Directly-observed (and video-recorded) steps were hand-counted, HR was measured using a chest-strapped monitor, and in the final minute of each bout, participants self-reported RPE. Segmented mixed model regression and Receiver Operating Characteristic (ROC) curve analyses identified optimal cadence thresholds associated with relatively-defined moderate (≥ 64%HRmax, ≥ 40%HRR, and ≥ 12 RPE) and vigorous (≥ 77%HRmax, ≥ 60%HRR, and ≥ 14 RPE) intensities. A compromise between the two analytical methods, including Youden's Index (a sum of sensitivity and specificity), positive and negative predictive values, and overall accuracy, yielded final heuristic cadences. Results: Across all relatively-defined moderate intensity indicators, segmented regression models and ROC curve analyses identified optimal cadence thresholds ranging from 105.9 to 112.8 steps/min and 102.0-104.3 steps/min, respectively. Comparable values for vigorous intensity indicators ranged between126.1-132.1 steps/min and 106.7–116.0 steps/min, respectively. Regardless of the relatively-defined intensity indicator, the overall best heuristic cadence threshold aligned with moderate intensity was ≥ 105 steps/min. Vigorous intensity varied between ≥ 115 (greater sensitivity) or ≥ 120 (greater specificity) steps/min. Conclusions: Heuristic cadence thresholds align with relatively-defined intensity indicators and can be useful for studying and prescribing older adults' physiological response to, and/or perceived experience of, ambulatory physical activity. Trial registration: Clinicaltrials.gov NCT02650258. Registered 24 December 2015.
- Subjects
WALKING speed; EXERCISE tests; STATISTICS; CARDIOPULMONARY system; SELF-evaluation; PHYSICAL activity; EXERCISE intensity; HEART beat; RECEIVER operating characteristic curves; DATA analysis; SENSITIVITY &; specificity (Statistics); VIDEO recording; MIDDLE age; OLD age
- Publication
International Journal of Behavioral Nutrition & Physical Activity, 2023, Vol 20, Issue 1, p1
- ISSN
1479-5868
- Publication type
Article
- DOI
10.1186/s12966-023-01543-w