Trial reportEuropean journal of applied physiology2016
Ventilatory responses to prolonged exercise with heavy load carriage.
Trial report in European journal of applied physiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
14 citing papers in PubMed, 34 citations in OpenAlex.
- Inspiratory muscle training improves exercise capacity with thoracic load carriage.Physiological reports · 2018Trial
- The impact of thoracic load carriage up to 45 kg on the cardiopulmonary response to exercise.European journal of applied physiology · 2016Trial
- Characterizing the respiratory muscle strength of male British Army infantry recruits.Physiological reports · 2026Article
- Rehabilitating Soldiers for Load Carriage Tasks: An International Perspective.International journal of environmental research and public health · 2025Review
- Performance with an additional load: formula-based predictions for controlling the load intensity when carrying backpacks.BMC sports science, medicine & rehabilitation · 2025Article
- Thoracic load carriage impairs the acute physiological response to hypoxia in healthy males.Physiological reports · 2025Article
- The test-retest reliability of physiological and perceptual responses during treadmill load carriage.European journal of applied physiology · 2024Article
- Load carriage physiology in normoxia and hypoxia.European journal of applied physiology · 2024Article
- Prolonged exercise shifts ventilatory parameters at the moderate-to-heavy intensity transition.European journal of applied physiology · 2024Article
- Physiological impact of load carriage exercise: Current understanding and future research directions.Physiological reports · 2022Review
- The Effects of Chest Wall Loading on Perceptions of Fatigue, Exercise Performance, Pulmonary Function, and Muscle Perfusion.Sports (Basel, Switzerland) · 2020Article
- Ventilatory responses in males and females during graded exercise with and without thoracic load carriage.European journal of applied physiology · 2019Article
- Respiratory Effects of Thoracic Load Carriage Exercise and Inspiratory Muscle Training as a Strategy to Optimize Respiratory Muscle Performance with Load Carriage.Springer science reviews · 2017Article
- The effects of heavy load carriage on physiological responses to graded exercise.European journal of applied physiology · 2016Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThe purpose of this experiment was to study breathing pattern and operating lung volume during 45 min of exercise with a heavy backpack (25 kg) and examine the effect of this exercise on respiratory muscle strength.
methodsFifteen males completed randomly ordered graded exercise tests on a treadmill with and without a correctly sized and fitted 25 kg pack. Subsequently, each subject completed, in random order, on separate days, 45 min of treadmill walking with and without the pack. Oxygen demand was matched between conditions (loaded: 3.01 ± 0.11 and unloaded 3.02 ± 0.11 L min(-1)).
resultsWith load, breathing frequency (f B) and minute ventilation increased by 21.7 and 15.1 % (P < 0.05), respectively, while tidal volume (V T) and end-inspiratory lung volume (EILV) were reduced by 6.3 and 6.4% (P < 0.05), respectively, compared to unloaded. Following loaded exercise, maximal inspiratory pressure decreased by 6.7% (P < 0.05) with no change in maximal expiratory pressure. No changes in maximal inspiratory or expiratory pressures were observed following unloaded exercise. Despite equivalent oxygen demand, perceived exercise stress and breathing discomfort was higher (P < 0.05) in the loaded condition.
conclusionsThe mechanical disadvantage placed on the respiratory system during exercise with a heavy pack led to compensatory changes in breathing pattern and EILV, and a reduction in maximal inspiratory pressure post-exercise. We suggest that in an attempt to minimize the work of breathing, subjects adopted a shallow and frequent breathing pattern. However, this pattern increased deadspace and minute ventilation, which likely contributed to altered perceptions of exercise stress and breathing discomfort.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.