1969-1976 Chairman, Research Committee, Sports and P.E. Authority, Ministry of Education and Culture, Israel
1970-1972 Chairman, Track and Field Technical Committee, Israel Sports Federation
1972 National Representative, International Council for Sports and Physical Education (I.C.S.P.E. -C.I.E.P.S.), Munich
1973 Member, Board of Directors, School of Physiotherapy,Kupat Cholim and Wingate Institute
1974-1978 Member, Board of Directors, the Wingate Institute
1975 Chairman, Israel Prize Referee Panel (Physical Culture)
1975-1981 Member, Board of Trustees, The Wingate Institute for Physical Education and Sport
1975-1976 Member, “Montreal Games” Committee, Israel Sports Federation
1976-1981 Member, Sports Medicine Committee, Sports and P.E. Authority, Ministry of Education and Culture, Israel
1976 National Representative, Research Committee of the International Council for Sports and Physical Education (I.C.S.P.E. – C.I.E.P.S.), Quebec City
1977-1981 Member, Board of Trustees, The Physical Education Teacher’s College at the Wingate Institute
1978-1979 Chairman, Accreditation Committee on Therapeutic Gymnastics (appointed by Secretary General, Ministry of Health, Israel)
1979-1980 Liaison, American Academy of Pediatrics, Committee on Pediatric Aspects of Physical Fitness, Recreation and Sports (representing American College of Sports Medicine)
1981 Chairman, Committee for Planning a Fitness Test in the Israeli School System (Ministry of Education and Culture)
1981 President, Israel Medical Games (Sports Committee)
1983-1985 Member, Task Force on Sports Medicine, McMaster University
1984-1992 President, International Council on Physical Fitness Research
1985-1990 Liaison, American Academy of Pediatrics, Committee on Sports Medicine (representing the Canadian Pediatric Society)
1985-1987 Chairman, American Medical Association Panel on Participation of the Pre-adolescent in Sports
1985-2005 Member, International Advisory Committee, The Howard and Mary Edith Cosell Center for Physical Education, Leisure and Recreation, Hebrew University, Jerusalem, Israel
1986-1987 President-Elect, Canadian Association of Sports Sciences
1987-1988 President, Canadian Association of Sports Sciences
1988-1990 Board Member, Canadian Fitness & Lifestyle Research Institute
1988-1989 Executive and Board Member, Sports Medicine Council of Canada
1988-1989 Past-President, Canadian Association of Sports Sciences
1989-2005 Board Member, American College of Sports Medicine
1990-2005 Consultant, American Academy of Pediatrics, Committee on Sport Medicine and Fitness
1992-2005 Board Member, Gatorade Sports Science Institute, Sports Medicine Board
1992-1994 Vice President, American College of Sport Medicine
1994-1996 Chairman, Ad Hoc Committee on Pediatric Exercise. American College of Sports Medicine
1994-2005 Board member, North American Society for Pediatric Exercise Medicine
1996-2005 Chairman, International Relations Committee American College of Sports Medicine
1996-2005 Member, External Advisory Committee Center for Prevention Research in Native Americans, University of Oklahoma
1997-2005 Member, Advisory Board, Sports Select
2000-2003 Chair, The Foundation for Active Healthy Kids
2000-2005 Member, Children & Youth Advisory Committee, Canadian Society for Exercise Physiology
2001-2005 Member, Editorial Board, Current Sports Medicine Reports
2001-2005 Consultant, Advisory Committee on Healthy Active Living for Children and Youth, Canadian Pediatric Society
2001-2005 Board Member, Obesity Canada
2001-2005 Member, Hamilton Community Foundation
2001-2005 Member, Task Force on ACSM’s National & International Alliances
2002-2005 Member, Panel on Dietary Reference Intakes for Electrolyes and Water – National Academy of Sciences, Washington, D.C.
2002-2005 AAP Representative for National Athletic Trainers’ Association Task Force on Exertional Heat Illness
2002-2005 Secretary, Obesity Canada
2003 Member, Advisory Board of Human Movement Journal