The effects of thoracic load carriage on maximal ambulatory work tolerance and acceptable work durations

Purpose Torso loads restrict chest-wall movement and ventilation, particularly during heavy exercise. Therefore, the differential impact of load carriage and chest-wall restriction was investigated during progressive treadmill exercise. In addition, acceptable work durations were derived across a wi...

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Veröffentlicht in:European journal of applied physiology 2016-03, Vol.116 (3), p.635-646
Hauptverfasser: Peoples, Gregory E., Lee, Daniel S., Notley, Sean R., Taylor, Nigel A.S.
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Sprache:eng
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Zusammenfassung:Purpose Torso loads restrict chest-wall movement and ventilation, particularly during heavy exercise. Therefore, the differential impact of load carriage and chest-wall restriction was investigated during progressive treadmill exercise. In addition, acceptable work durations were derived across a wide range of submaximal, loaded exercise intensities. Methods Twelve males participated in two research phases. Phase 1: Three incremental treadmill tests until exhaustion [control (clothing only), load carriage (clothing plus 22-kg vest), and clothing with chest strapping]. Phase 2: Five steady-state exercise trials (clothing plus 22-kg vest) at intensities from 30 to 80 % of peak aerobic power to determine maximal acceptable work durations. Results Maximal work tolerance [control 17.21 min (±0.93); loaded 13.44 min (±0.68); strapped 17.00 min (±0.83)] and the mass-specific peak aerobic power [control 61.61 mL kg −1  min −1 (±2.28); loaded 45.42 mL kg −1  min −1 (±1.41); strapped 59.99 mL kg −1  min −1 (±1.61)] were reduced only when loaded ( P  
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-015-3323-5