Metabolic costs of load carriage with different container sizes S. J. MORRISSEY & Y. H. LIOU Six well-trained male subjects carried boxes of varying box width and weight at varying speeds on a level treadmill until steady-state heart rates were obtained. Analysis of the steady-state data for heart rate and metabolic cost led to development of highly accurate predictor models for both factors. The metabolic-cost model accounted for over 94% of the variance (R2>0·94), and the heart-rate model accounted for over 81% of the variance present (R2>0·81). Evaluation of other models for predicting physiological response to carrying loads found their predictions to differ significantly from the data of the present study. Key words: WorkLoad carriageMetabolic costModellingComparison of Selected Perceptual Variables for Backpacks with Internal and External Frames AbstractDifferences in perceptions of comfort, exertion, balance, and heart rate were investigated with two types of backpack.
Subjects were 20 male volunteers (M age = 24.3 yr., SD: 3.6, M height= 180.02 cm, SD: 8.0, and M weight = 86.46 kg, SD: 14.84). Following oral briefing and practice trials, each subject was fitted at random with either an internal- or external-frame backpack containing 18.2 kg.
eberlestock x1e backpackBy random, cross-over design, subjects completed a 30-m simulated hiking trail consisting of 16 separate obstacles designed to resemble actual off-trail hiking.
hp backpack para laptop de poliester basica hp 16Trials were conducted in a controlled environment with the walking intensity regulated by a metronome.
targus backpack cvr600Upon completion of each trial, the subjects rated the experience on perceived comfort, balance and stability, and rating of perceived exertion.
Heart rate was recorded immediately prior to and following each trial. Analysis yielded a significant difference only on rating of perceived exertion in favor of the internal-frame backpack. Under limited circumstances, these data suggest that both types of backpacks provide similar comfort and balance and stability; however, internal frames in backpacks may reduce perceived exertion during short, demanding hikes.ReferencesChooseTop of pageAbstractReferences <
Simply select your manager software from the list below and click on download. For more information or tips please see 'Downloading to a citation manager' in the Help menu. RIS (ProCite, Reference Manager)EndNoteBibTexMedlarsRefWorks Comparison of Selected Perceptual Variables for Backpacks with Internal and External Frames View permissions information for this article Send me a copy LOAD CARRIAGE AND ITS PHYSIOLOGICAL IMPACT LOAD CARRIAGE AND ITS BIOMECHANICAL IMPACT LOAD CARRIAGE AND ITS HEALTH IMPACT The female athlete triad Urinary Incontinence and Pelvic Floor Muscle Function STRATEGIES TO IMPROVE FEMALE LOAD CARRIAGE PERFORMANCE AND MINIMISE INJURIES Modification of Load Carriage Equipment to meet Female Soldier Requirements Limitations of this paper and recommendations for future work Download a PDF of this articleEffects of walking poles on lower extremity gait mechanics. Effective gait patterns for offloading the medial compartment of the knee.
Trekking poles increase physiological responses to hiking without increased perceived exertion. Acute responses to using walking poles in patients with coronary artery disease. Effects of hiking downhill using trekking poles while carrying external loads. Self-guided brisk walking training with or without poles: a randomized-controlled trial in middle-aged women. The effects of walking poles on shoulder function in breast cancer survivors. Effects of hiking pole inertia on energy and muscular costs during uphill walking. Nordic walking--is it suitable for patients with fractured vertebra? Field testing of physiological responses associated with Nordic Walking. Increasing exercise tolerance of persons limited by claudication pain using polestriding. Muscular and metabolic costs of uphill backpacking: are hiking poles beneficial? Load carriage energy expenditure with and without hiking poles during inclined walking. Nordic poles immediately improve walking distance in patients with intermittent claudication.
Nordic Walking Improves Health of Heart Failure Patients Cooper Institute: In our Nordic Walking Study, participants were monitored and evaluated in an effort to compare oxygen consumption and energy expenditure associated with regular walking (walking without poles) and Nordic walking (walking with poles). As further detailed in Table 1, Nordic walking significantly increased oxygen consumption, caloric expenditure, heart rate, and heart rate as a percentage of maximum heart rate for both men and women without significantly affecting the rate of perceived exertion by the participants. More specifically, Nordic walking resulted in approximately a 20% increase in oxygen consumption and energy expenditure compared to regular walking at the same speed. Thus, the implementation of upper body muscular work while walking increases the amount of calories burned. This finding has important health implications as an individual who employs walking with poles as opposed to regular walking into their regular fitness program will significantly increase the amount of calories burned particularly over an extended period of time.