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      Walking cadence (steps/min) and intensity in 21–40 year olds: CADENCE-adults

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          Abstract

          Background

          Previous studies have reported that walking cadence (steps/min) is associated with absolutely-defined intensity (metabolic equivalents; METs), such that cadence-based thresholds could serve as reasonable proxy values for ambulatory intensities.

          Purpose

          To establish definitive heuristic (i.e., evidence-based, practical, rounded) thresholds linking cadence with absolutely-defined moderate (3 METs) and vigorous (6 METs) intensity.

          Methods

          In this laboratory-based cross-sectional study, 76 healthy adults (10 men and 10 women representing each 5-year age-group category between 21 and 40 years, BMI = 24.8 ± 3.4 kg/m 2) performed a series of 5-min treadmill bouts separated by 2-min rests. Bouts began at 0.5 mph and increased in 0.5 mph increments until participants: 1) chose to run, 2) achieved 75% of their predicted maximum heart rate, or 3) reported a Borg rating of perceived exertion > 13. Cadence was hand-tallied, and intensity (METs) was measured using a portable indirect calorimeter. Optimal cadence thresholds for moderate and vigorous ambulatory intensities were identified using a segmented regression model with random coefficients, as well as Receiver Operating Characteristic (ROC) models. Positive predictive values (PPV) of candidate heuristic thresholds were assessed to determine final heuristic values.

          Results

          Optimal cadence thresholds for 3 METs and 6 METs were 102 and 129 steps/min, respectively, using the regression model, and 96 and 120 steps/min, respectively, using ROC models. Heuristic values were set at 100 steps/min (PPV of 91.4%), and 130 steps/min (PPV of 70.7%), respectively.

          Conclusions

          Cadence thresholds of 100 and 130 steps/min can serve as reasonable heuristic thresholds representative of absolutely-defined moderate and vigorous ambulatory intensity, respectively, in 21–40 year olds. These values represent useful proxy values for recommending and modulating the intensity of ambulatory behavior and/or as measurement thresholds for processing accelerometer data.

          Trial registration

          Clinicaltrials.gov ( NCT02650258).

          Electronic supplementary material

          The online version of this article (10.1186/s12966-019-0769-6) contains supplementary material, which is available to authorized users.

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          Most cited references39

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          Index for rating diagnostic tests

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            American College of Sports Medicine position stand. Quantity and quality of exercise for developing and maintaining cardiorespiratory, musculoskeletal, and neuromotor fitness in apparently healthy adults: guidance for prescribing exercise.

            The purpose of this Position Stand is to provide guidance to professionals who counsel and prescribe individualized exercise to apparently healthy adults of all ages. These recommendations also may apply to adults with certain chronic diseases or disabilities, when appropriately evaluated and advised by a health professional. This document supersedes the 1998 American College of Sports Medicine (ACSM) Position Stand, "The Recommended Quantity and Quality of Exercise for Developing and Maintaining Cardiorespiratory and Muscular Fitness, and Flexibility in Healthy Adults." The scientific evidence demonstrating the beneficial effects of exercise is indisputable, and the benefits of exercise far outweigh the risks in most adults. A program of regular exercise that includes cardiorespiratory, resistance, flexibility, and neuromotor exercise training beyond activities of daily living to improve and maintain physical fitness and health is essential for most adults. The ACSM recommends that most adults engage in moderate-intensity cardiorespiratory exercise training for ≥30 min·d on ≥5 d·wk for a total of ≥150 min·wk, vigorous-intensity cardiorespiratory exercise training for ≥20 min·d on ≥3 d·wk (≥75 min·wk), or a combination of moderate- and vigorous-intensity exercise to achieve a total energy expenditure of ≥500-1000 MET·min·wk. On 2-3 d·wk, adults should also perform resistance exercises for each of the major muscle groups, and neuromotor exercise involving balance, agility, and coordination. Crucial to maintaining joint range of movement, completing a series of flexibility exercises for each the major muscle-tendon groups (a total of 60 s per exercise) on ≥2 d·wk is recommended. The exercise program should be modified according to an individual's habitual physical activity, physical function, health status, exercise responses, and stated goals. Adults who are unable or unwilling to meet the exercise targets outlined here still can benefit from engaging in amounts of exercise less than recommended. In addition to exercising regularly, there are health benefits in concurrently reducing total time engaged in sedentary pursuits and also by interspersing frequent, short bouts of standing and physical activity between periods of sedentary activity, even in physically active adults. Behaviorally based exercise interventions, the use of behavior change strategies, supervision by an experienced fitness instructor, and exercise that is pleasant and enjoyable can improve adoption and adherence to prescribed exercise programs. Educating adults about and screening for signs and symptoms of CHD and gradual progression of exercise intensity and volume may reduce the risks of exercise. Consultations with a medical professional and diagnostic exercise testing for CHD are useful when clinically indicated but are not recommended for universal screening to enhance the safety of exercise.
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              2011 Compendium of Physical Activities: a second update of codes and MET values.

              The Compendium of Physical Activities was developed to enhance the comparability of results across studies using self-report physical activity (PA) and is used to quantify the energy cost of a wide variety of PA. We provide the second update of the Compendium, called the 2011 Compendium. The 2011 Compendium retains the previous coding scheme to identify the major category headings and specific PA by their rate of energy expenditure in MET. Modifications in the 2011 Compendium include cataloging measured MET values and their source references, when available; addition of new codes and specific activities; an update of the Compendium tracking guide that links information in the 1993, 2000, and 2011 compendia versions; and the creation of a Web site to facilitate easy access and downloading of Compendium documents. Measured MET values were obtained from a systematic search of databases using defined key words. The 2011 Compendium contains 821 codes for specific activities. Two hundred seventeen new codes were added, 68% (561/821) of which have measured MET values. Approximately half (317/604) of the codes from the 2000 Compendium were modified to improve the definitions and/or to consolidate specific activities and to update estimated MET values where measured values did not exist. Updated MET values accounted for 73% of all code changes. The Compendium is used globally to quantify the energy cost of PA in adults for surveillance activities, research studies, and, in clinical settings, to write PA recommendations and to assess energy expenditure in individuals. The 2011 Compendium is an update of a system for quantifying the energy cost of adult human PA and is a living document that is moving in the direction of being 100% evidence based.
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                Author and article information

                Contributors
                +1 413 577 4702 , ctudorlocke@umass.edu
                eaguiar@umass.edu
                hohan@okstate.edu
                sducharm@umass.edu
                john.schuna@oregonstate.edu
                tvbarrei@syr.edu
                ccmoore@umass.edu
                mbusa@umass.edu
                jlim@tamusa.edu
                sirard@kin.umass.edu
                schipkin@kin.umass.edu
                jstauden@math.umass.edu
                Journal
                Int J Behav Nutr Phys Act
                Int J Behav Nutr Phys Act
                The International Journal of Behavioral Nutrition and Physical Activity
                BioMed Central (London )
                1479-5868
                17 January 2019
                17 January 2019
                2019
                : 16
                : 8
                Affiliations
                [1 ]ISNI 0000 0001 2184 9220, GRID grid.266683.f, Department of Kinesiology, , University of Massachusetts Amherst, ; 160A Totman Building, 30 Eastman Lane, Amherst, MA 01003 USA
                [2 ]ISNI 0000 0001 0721 7331, GRID grid.65519.3e, School of Community Health Sciences, Counseling and Counseling Psychology, , Oklahoma State University, ; Stillwater, OK 74078 USA
                [3 ]ISNI 0000 0001 2112 1969, GRID grid.4391.f, School of Biological and Population Health Sciences, , Oregon State University, ; Corvallis, OR 97331 USA
                [4 ]ISNI 0000 0001 2189 1568, GRID grid.264484.8, School of Education, , Syracuse University, ; Syracuse, New York 13244 USA
                [5 ]ISNI 0000 0001 2184 9220, GRID grid.266683.f, Institute for Applied Life Sciences, , University of Massachusetts Amherst, ; Amherst, MA 01003 USA
                [6 ]ISNI 0000 0001 0180 5693, GRID grid.469272.c, Department of Counseling, Health and Kinesiology, , Texas A&M University - San Antonio, ; San Antonio, TX 78224 USA
                [7 ]ISNI 0000 0001 2184 9220, GRID grid.266683.f, Department of Mathematics and Statistics, , University of Massachusetts Amherst, ; Amherst, MA 01003 USA
                Author information
                http://orcid.org/0000-0003-4342-5909
                Article
                769
                10.1186/s12966-019-0769-6
                6337834
                30654810
                5e1026a6-db96-4390-9371-2ebc6d55ed1b
                © The Author(s). 2019

                Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

                History
                : 30 May 2018
                : 4 January 2019
                Funding
                Funded by: National Institute on Aging (US)
                Award ID: 5R01AG049024
                Award Recipient :
                Categories
                Research
                Custom metadata
                © The Author(s) 2019

                Nutrition & Dietetics
                physical activity,pedometer,accelerometer,exercise
                Nutrition & Dietetics
                physical activity, pedometer, accelerometer, exercise

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