World's Best Scientists 2026 revealed!

D-Index & Metrics

Social Sciences and Humanities

D-Index
45
Citations
20746
World Ranking
3734
National Ranking
1785

John R. Sirard publication distribution in Social Sciences and Humanities in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Social Sciences and Humanities in 2026. The highlighted bar marks where John R. Sirard sits on this spectrum.

44–53 publications: 28 scientists 54–63 publications: 61 scientists 64–73 publications: 161 scientists 74–83 publications: 225 scientists 84–93 publications: 301 scientists 94–103 publications: 390 scientists 104–113 publications: 406 scientists 114–123 publications: 474 scientists 124–133 publications: 453 scientists 134–143 publications: 434 scientists 144–153 publications: 407 scientists 154–163 publications: 411 scientists 164–173 publications: 391 scientists 174–183 publications: 313 scientists 184–193 publications: 319 scientists 194–203 publications: 304 scientists 204–213 publications: 285 scientists 214–223 publications: 246 scientists 224–233 publications: 213 scientists 234–243 publications: 170 scientists 244–253 publications: 167 scientists 254–263 publications: 162 scientists 264–273 publications: 138 scientists 274–283 publications: 138 scientists 284–293 publications: 113 scientists 294–303 publications: 106 scientists 304–313 publications: 95 scientists 314–323 publications: 101 scientists 324–333 publications: 81 scientists 334–343 publications: 69 scientists 344–353 publications: 56 scientists 354–363 publications: 36 scientists 364–373 publications: 42 scientists 374–383 publications: 41 scientists 384–393 publications: 44 scientists 394–403 publications: 27 scientists 404–413 publications: 30 scientists 414–423 publications: 20 scientists 424–433 publications: 29 scientists 434–443 publications: 29 scientists 444–453 publications: 25 scientists 454–463 publications: 19 scientists 464–473 publications: 21 scientists 474–483 publications: 11 scientists 484–493 publications: 17 scientists 494–503 publications: 7 scientists 504–513 publications: 6 scientists 514–523 publications: 12 scientists 524–533 publications: 10 scientists 534–543 publications: 7 scientists 544–553 publications: 6 scientists 554–563 publications: 12 scientists 564–569 publications: 8 scientists 570+ publications: 100 scientists
44 publications 570+

This scientist: 148 publications — 40th percentile

40% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 570 publications or more.

John R. Sirard D-index placement in Social Sciences and Humanities in 2026

The chart shows the D-index (discipline H-index) distribution of Social Sciences and Humanities scientists ranked by Research.com in 2026. The highlighted bar marks where John R. Sirard sits on this spectrum.

30 D-Index: 177 scientists 31 D-Index: 210 scientists 32 D-Index: 222 scientists 33 D-Index: 188 scientists 34 D-Index: 181 scientists 35 D-Index: 243 scientists 36 D-Index: 261 scientists 37 D-Index: 272 scientists 38 D-Index: 278 scientists 39 D-Index: 300 scientists 40 D-Index: 297 scientists 41 D-Index: 308 scientists 42 D-Index: 313 scientists 43 D-Index: 300 scientists 44 D-Index: 269 scientists 45 D-Index: 260 scientists 46 D-Index: 228 scientists 47 D-Index: 251 scientists 48 D-Index: 203 scientists 49 D-Index: 186 scientists 50 D-Index: 187 scientists 51 D-Index: 166 scientists 52 D-Index: 138 scientists 53 D-Index: 141 scientists 54 D-Index: 131 scientists 55 D-Index: 137 scientists 56 D-Index: 109 scientists 57 D-Index: 129 scientists 58 D-Index: 95 scientists 59 D-Index: 105 scientists 60 D-Index: 106 scientists 61 D-Index: 86 scientists 62 D-Index: 94 scientists 63 D-Index: 77 scientists 64 D-Index: 79 scientists 65 D-Index: 59 scientists 66 D-Index: 68 scientists 67 D-Index: 51 scientists 68 D-Index: 49 scientists 69 D-Index: 40 scientists 70 D-Index: 43 scientists 71 D-Index: 40 scientists 72 D-Index: 50 scientists 73 D-Index: 46 scientists 74 D-Index: 43 scientists 75 D-Index: 45 scientists 76 D-Index: 45 scientists 77 D-Index: 30 scientists 78 D-Index: 25 scientists 79 D-Index: 31 scientists 80 D-Index: 29 scientists 81 D-Index: 18 scientists 82 D-Index: 21 scientists 83 D-Index: 26 scientists 84 D-Index: 15 scientists 85 D-Index: 15 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 12 scientists 89 D-Index: 7 scientists 90 D-Index: 19 scientists 91 D-Index: 20 scientists 92 D-Index: 13 scientists 93 D-Index: 9 scientists 94 D-Index: 13 scientists 95 D-Index: 8 scientists 96 D-Index: 7 scientists 97 D-Index: 6 scientists 98 D-Index: 6 scientists 99 D-Index: 6 scientists 100+ D-Index: 97 scientists
30 D-Index 100+

This scientist: 45 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 100 D-Index or more.

Overview

John R. Sirard is affiliated with the University of Massachusetts Amherst in the United States. Their research primarily falls within the broad field of Medicine, with a significant focus on Physiology and Public Health, Environmental and Occupational Health, as well as Complementary and Alternative Medicine. Additional subfields include Experimental and Cognitive Psychology and General Health Professions.

Sirard's work covers several main topics, notably Physical Activity and Health, Obesity, Physical Activity, Diet, and Cardiovascular and Exercise Physiology. Other topics addressed include Sports Performance and Training, Sleep and Related Disorders, Health and Lifestyle Studies, and Behavioral Health and Interventions.

The scientist has authored multiple papers published in various academic venues. Frequent publication platforms include Medicine & Science in Sports & Exercise, Journal for the Measurement of Physical Behaviour, Journal of Adolescent and Young Adult Oncology, UNC Libraries, and American Journal of Health Behavior.

Key recent papers include:

  • "Sleep is Inversely Associated with Sedentary Time among Youth with Obesity" (2020, American Journal of Health Behavior)
  • "Sleep Measurement Using Wrist-Worn Accelerometer Data Compared with Polysomnography" (2022, Sensors)
  • "Association of the time of day of peak physical activity with cardiovascular mortality: Findings from the UK Biobank study" (2023, Chronobiology International)
  • "A Novel Video-Based Direct Observation System for Assessing Physical Activity and Sedentary Behavior in Children and Young Adults" (2020, Journal for the Measurement of Physical Behaviour)
  • "Expert Consensus on Physical Activity Use for Young Adult Cancer Survivors' Biopsychosocial Health: A Modified Delphi Study" (2021, Journal of Adolescent and Young Adult Oncology)

Sirard has collaborated frequently with a number of coauthors. These include Robert T. Marcotte, John Staudenmayer, Melanna F. Cox, Greg J. Petrucci, and Nicholas Remillard.

Best Publications

  • Calibration of the Computer Science and Applications, Inc. accelerometer.

    Patty S. Freedson;Edward Melanson;John Sirard

  • Using Pedometers to Increase Physical Activity and Improve Health: A Systematic Review

    Dena M. Bravata;Crystal Smith-Spangler;Vandana Sundaram;Allison L. Gienger

  • Age and gender differences in objectively measured physical activity in youth.

    Stewart G. Trost;Russell R. Pate;James F. Sallis;Patty S. Freedson

  • Physical Activity Assessment in Children and Adolescents

    John R. Sirard;Russell R. Pate

  • Longitudinal and Secular Trends in Physical Activity and Sedentary Behavior During Adolescence

    Melissa C. Nelson;Dianne Neumark-Stzainer;Peter J. Hannan;John R. Sirard

  • Compliance with physical activity guidelines: prevalence in a population of children and youth.

    Russell R. Pate;Patty S. Freedson;James F. Sallis;Wendell C. Taylor

  • Physical activity in overweight and nonoverweight preschool children.

    Stewart G. Trost;John R. Sirard;Marsha Dowda;Karin A. Pfeiffer

  • Calibration and Evaluation of an Objective Measure of Physical Activity in Preschool Children

    John R. Sirard;Stewart G. Trost;Karin A. Pfeiffer;Marsha Dowda

  • Influences of preschool policies and practices on children's physical activity.

    Marsha Dowda;Russell R. Pate;Stewart G. Trost;M. Joāo C. A. Almeida

  • Validation of a 3-Day Physical Activity Recall Instrument in Female Youth

    Russell R. Pate;Rebecca Ross;Marsha Dowda;Stewart G. Trost

  • Walking and Bicycling to School: A Review:

    John R. Sirard;Megan E. Slater

  • Physical activity and active commuting to elementary school.

    John R. Sirard;William F. Riner;Kerry L. McIver;Russell R. Pate

  • Motivational factors associated with sports program participation in middle school students.

    John R. Sirard;Karin A. Pfeiffer;Russell R. Pate

  • Using Pedometers to Increase Physical Activity and Improve Health

    Dena M. Bravata;Crystal Smith-Spangler;Vandana Sundaram;Allison L. Gienger

  • Preventing childhood obesity: a solution-oriented research paradigm.

    Thomas N. Robinson;John R. Sirard

  • CALIBRATION OF THE COMPUTER SCIENCE AND APPLICATIONS, INC. (CSA) ACCELEROMETER 256

    P. S. Freedson;J. Sirard;E. Debold;R. Pate

  • Physical activity in overweight and non-overweight pre-school children

    S. G. Trost;J. R. Sirard;M. Dowda;R. R. Pate

  • The effects of increasing outdoor play time on physical activity in Latino preschool children

    Sofiya Alhassan;John R. Sirard;Thomas N. Robinson

  • Field evaluation of the Computer Science and Applications, Inc. physical activity monitor.

    John R. Sirard;Edward L. Melanson;Li Li;Patty S. Freedson

  • The relative influence of demographic, individual, social, and environmental factors on physical activity among boys and girls

    Carrie D. Patnode;Leslie A. Lytle;Darin J. Erickson;John R. Sirard

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

    Catrine Tudor-Locke;Elroy J. Aguiar;Ho Han;Ho Han;Scott W. Ducharme

Frequent Co-Authors

Russell R. Pate
Russell R. Pate University of South Carolina
Patty S. Freedson
Patty S. Freedson University of Massachusetts Amherst
Marsha Dowda
Marsha Dowda University of South Carolina
Stewart G. Trost
Stewart G. Trost University of Queensland
Leslie A. Lytle
Leslie A. Lytle University of North Carolina at Chapel Hill
James F. Sallis
James F. Sallis University of California, San Diego
Karin A. Pfeiffer
Karin A. Pfeiffer Michigan State University
Arthur Weltman
Arthur Weltman University of Virginia
Jayne A. Fulkerson
Jayne A. Fulkerson University of Minnesota
Mary Story
Mary Story Duke University

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