Academic journal article Research Quarterly for Exercise and Sport

Heart Rate Responses and Estimated Energy Expenditure during Backpacking

Academic journal article Research Quarterly for Exercise and Sport

Heart Rate Responses and Estimated Energy Expenditure during Backpacking

Article excerpt

Dale DeVoe, Colorado State University

The physiological demand associated with backpacking should be assessed in order to anticipate its effects and properly plan for excursions. Whereas many recreational activities last only a few hours, backpacking usually involves longer amounts of time. The purpose of this study was to evaluate heart rate (HR) responses and estimate energy expenditure (EE) during a 7-day backpacking trip. The participant for this case study was a 42-year-old man who was an experienced backpacker with acclimatization to an altitude of 1,500 m. Prior to the hiking trip, the participant underwent a maximal stress test in order to establish a basis for calculating the relative HR (HRmax = 183 b.[min.sup.-1]) and oxygen consumption responses ([VO.sub.2]max = 54.47 ml.[kg.sup.-1].[min.sup.-1]). The selected route was 122.4 km of trails in the Grand Canyon National Park in Arizona. During the backpacking expedition, the participant's was measured every minute using Polar Vantage XL monitors. The participant's energy expenditure was calculated from [O.sub.2] consumption and [CO.sub.2] production, recorded every 20s and measured with an Aerosport KB1-C Metabolic Analysis System. A HR-[VO.sub.2] regression was developed for backpacking while the participant hiked for three 30-mm test sessions on the selected trails. …

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