The effects of caloric restriction on the travel and manipulation components of human motion

  • Shelby J. Harris
  • Josef Brožek
  • Karl U. Smith


Electronic techniques of motion analysis have been used to evaluate the effects of a restricted diet on travel and manipulation components of motion. 13 subjects were tested at regular intervals during the 3 phases of the experiment: (a) a 21-day control period, (b) a 24-day period of maintenance on a 1000 calorie, all-carbohydrate diet, and (c) a 21-day recovery period. 2 conditions of pacing were employed: a 10-minute period of continuous performance at a “normal” or “comfortable” pace, and a 2-minute period of continuous performance at a “maximum” pace. The results of the study may be summarized as follows:
  1. 1.

    Travel times increase significantly during food restriction under both conditions of pacing.

  2. 2.

    No significant change in manipulation times attributable to food restriction is evident under either condition of pacing.

  3. 3.

    A significant work decrement is apparent only in manipulation movevements under maximum pacing.

  4. 4.

    Work decrements do not change significantly as a function of nutritional deficit for either motion component.



Travel Time Caloric Restriction Food Restriction Human Motion Control Period 
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Copyright information

© Springer-Verlag 1958

Authors and Affiliations

  • Shelby J. Harris
    • 1
    • 2
    • 3
  • Josef Brožek
    • 1
    • 2
  • Karl U. Smith
    • 1
    • 2
  1. 1.Laboratory of Physiological HygieneUniversity of MinnesotaMinneapolis 14
  2. 2.Department of PsychologyUniversity of WisconsinMadison
  3. 3.Department of PsychologyLehigh UniversityBethlehemUSA

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