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A comparison between laddermill and treadmill maximal oxygen consumption

M A Montoliu1, V Gonzalez, B Rodriguez

  • 1Instituto Nacional de Silicosis Fisiología Respiratoria (Unidad de Ergonomía), Oviedo, Spain.

European Journal of Applied Physiology and Occupational Physiology
|January 1, 1997
PubMed
Summary

Treadmill running elicits higher maximal oxygen consumption (VO2max) than laddermill climbing in fitter individuals. Treadmill VO2max may overestimate exercise capacity for jobs involving ladder climbing.

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Area of Science:

  • Exercise Physiology
  • Occupational Health

Background:

  • Maximal oxygen consumption (VO2max) assesses work capacity.
  • Treadmill running is common for VO2max testing due to large muscle engagement.
  • Laddermill climbing is hypothesized to yield higher VO2max due to greater muscle recruitment (arms and legs).

Purpose of the Study:

  • To compare VO2max elicited by laddermill climbing versus treadmill running.
  • To investigate if laddermill climbing yields a higher VO2max than treadmill running.

Main Methods:

  • Progressive maximal exercise tests to exhaustion were conducted on 44 active coal miners.
  • Tests were performed on a laddermill (75° slant, 25 cm rung separation) and a treadmill (5% gradient).
  • Maximal oxygen consumption (VO2max) and maximal heart rate (f(cmax)) were measured.

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Main Results:

  • Treadmill running resulted in a significantly higher mean VO2max (2.98 L/min) compared to laddermill climbing (2.83 L/min).
  • Maximal heart rates were similar between the two exercise modalities.
  • The difference in VO2max between the two tests was negatively related to relative VO2max and body mass.

Conclusions:

  • Treadmill running elicits a higher VO2max than laddermill climbing in active coal miners.
  • For fitter individuals or those with higher body mass, laddermill exercise may not be sufficiently intense to reach maximal capacity.
  • Treadmill VO2max may overestimate exercise capacity for tasks involving ladder climbing.