A Comparison of Caloric Expenditure for Walking versus Running Onemile

1
A Comparison of Caloric Expenditure for Walking
versus Running One-mile

• Michelle B., Will C., Saima D.,
• Nolan G., Jill H., Sara P.

2
Literature Review

• Reported data
• B Braun Umass Amherst 2002
• Walking 20 miles will utilize the same amount of
  calories as running 20 miles as long as distance
  is equal
  
• PS Freedson Umass Amherst 2002
• Walking a mile is comparable to running a mile
  with regards to caloric expenditure and without
  correcting for intensity
  

3
Review cont.

• Conflicting data with reported data
• Powers and Howley (McGraw-Hill 2001)
• Published data running a mile will burn 2X the
  amount of calories in comparison to walking a
  mile when controlling for body size (kcal/kg)
  
• Umass Amherst Campus View (questionnaire date
  2002)
  
• N60, 6 groups (subsample n10)
• Umass Professor kcal run 1 milewalk 1 mile
• Umass Undergrads kcal for walk 1 mile ?run 1 mile

4
Current Beliefs (cont.)
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Hypothesis

• Running a measured mile will expend more kcal
  than walking a measured mile

6
Experimental Design

• Approval via Dr. Braun and Human Subjects
  Committee
  
• Verbal Consent from all participants
• Participants (N4)
• college-aged students
• 3 hr fasting period prior to all testing
  procedure
  
• no strenuous exercise within 24hr
• maintain daily routine
• no caffeine or supplements within 24hr

7
Experimental Design cont.

• Record height (in) and weight (lb) for each
  testing session
  
• Calibrate metabolic cart
• Fit subjects with
• HR monitor
• Headpiece and Hans-Rudolph mouthpiece
• Keep mouthpeice in for warm-up, mile walked/run
  and 20s after completion
  

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Pilot Study

• Pre-determine TM speeds via HR
• Walking speed 40 Age predicted HRmax
• Running speed 60 Age predicted HRmax
• Randomized Trial
• Walk a mile then rest for 1 hr
• Run a mile

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Results of Pilot Study

• TM speeds cannot be based on HR
• Causes biomechanical inefficiency, may effect
  results
  
• HR may fluctuate
• e.g. hydration, nervousness of testing
• Data collection time block inadequate
• time block of 3 hr per subject not feasible

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Experimental Protocol Revised

• 2 Separate days of data collection
• randomized
• following same pre-testing protocol (e.g. no
  caffeine)
  
• Intensity control
• Use of Borg scale
• Walking3 (moderate intensity)
• Running6 (strong intensity)
• 5 min warm-up to establish intensity

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Results

• N3 (one subject did not complete protocol)

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Results (cont.)

• Differences in caloric expenditure for 1 mile
  varied between subjects
  
• Relative to body wt (kg) there is a difference

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Discussion

• Hypothesis WAS supported
• Difference in caloric expenditure for walking and
  running one measured mile
  
• Differences in relative caloric expenditure
  (kcal/kg) for walking and running one measured
  mile
  
• Comparing with previous literature
• Does not support PS Freedson nor B Braun
• Differences in relative kcal expenditure does not
  support Powers Howley (2001)
  
• Supports Umass Undergrads questionnaire results

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Limitations Future Studies

• Small sample size
• Short distance
• Lack of control for training status
• trained endurance runner had lowest difference in
  kcal
  
• others were untrained

• Larger Sample Size
• Longer distance
• Control for training status
• Test for gender differences

15
Acknowledgements

• Rebecca Hasson
• Exercise Physiology Lab
• Questionnaire participants (you know who you
  are)
  
• Dave Pober
• Dr B. Braun