Effect of acute altitude exposure on ventilatory thresholds in recreational athletes

Schüttler, Dominik; Weckbach, Ludwig T.; Hamm, Wolfgang; Maier, Florian; Kassem, Sari; Schier, Johannes; Lackermair, Korbinian; Brunner, Stefan

doi:10.1016/j.resp.2021.103723

Cited by 4 publications

(2 citation statements)

References 25 publications

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“…We used Metalyzer 3B R3 system by Cortex Biophysik GmbH (Leipzig, Germanny) with Meta Soft Studio. The conduct of CPET was described in our previous work [17]. Briefly, Metalyzer 3B-R3 collects gas samples breath by breath.…”

Section: Methodsmentioning

confidence: 99%

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Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes

et al. 2023

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Background: Heat induces a thermoregulatory strain that impairs cardiopulmonary exercise capacity. The aim of the current study is to elucidate the effect of isolated dehydration on cardiopulmonary exercise capacity in a model of preparticipating hypohydration. Methods: Healthy recreational athletes underwent a standardised fluid deprivation test. Hypohydration was assessed by bioelectrical impedance analysis (BIA) and laboratory testing of electrolytes and retention parameters in the blood and urine. The participants underwent cardiopulmonary exercise testing (CPET) with a cycle ramp protocol. Each participant served as their own control undergoing CPET in a hypohydrated [HYH] and euhydrated [EUH] state. Results: Fluid deprivation caused a mild (2%) but significant reduction of body water (38.6 [36.6; 40.7] vs. 39.4 [37.4; 41.5] %; p < 0.01) and an increase of urine osmolality (767 [694; 839] vs. 537 [445; 629] mosm/kg; p < 0.01). Hypohydration was without alterations of electrolytes, serum osmolality or hematocrit. The oxygen uptake was significantly lower after hypohydration (−4.8%; p = 0.02 at ventilatory threshold1; −2.0%; p < 0.01 at maximum power), with a corresponding decrease of minute ventilation (−4% at ventilatory threshold1; p = 0.01, −3.3% at maximum power; p < 0.01). The power output was lower in hypohydration (−6.8%; p < 0.01 at ventilatory threshold1; −2.2%; p = 0.01 at maximum power). Conclusion: Isolated hypohydration causes impairment of workload as well as peak oxygen uptake in recreational athletes. Our findings might indicate an important role of hypohydration in the heat-induced reduction of exercise capacity.

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Section: Methodsmentioning

confidence: 99%

“…Heart rate was recorded via ECG, ventilatory threshold (VT) 1 was determined by (1) V-Slope method, (2) EqO 2 increase and (3) with RER < 1. VT2 was determined by (1) VE-Slope method, (2) decrease in PetCO 2 (3) with respiratory exchange rate (RER) > 1 [17]. There was a minimum of one week between both tests.…”

Section: Methodsmentioning

confidence: 99%

Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes

et al. 2023

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Effect of Acute Altitude Exposure on Anaerobic Threshold Assessed by a Novel Electrocardiogram-Based Method

Weis,

Schlichtiger,

Lackermair

et al. 2024

High Altitude Medicine & Biology

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An Integrated Approach to Assess the Potential of Forest Areas for Therapy Services

Dodev

Zhiyanski

Glushkova

et al. 2021

Land

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The study considers forest therapy as a tool for diversification of forest management. An up-to-date integrated approach for assessing and mapping potential of forest areas which could provide conditions for forest therapy services is developed and tested. It is based on combining data from the traditional forest inventory in Bulgaria and other open databases with methods for integrated assessment and mapping of ecosystem services: 7 criteria groups and 22 indicators are proposed, rated on a 5-point scale. Overlay analysis is applied to generate a composite assessment for each forest unit. Using spatial statistics tools, territorial hot spots with potential for forest therapy are identified. The methodology was successfully tested in a pilot case-study region, Smolyan Municipality, but it is applicable at broader scale, regardless of the type and ownership of forests. This approach could be transferred to other countries as well after adapting to their geographical, geoecological and socio-cultural specifics and database available. It is a cost-effective and informative tool to support forest owners and managers to diversify forest welfare services focusing on insufficiently used forest recreation potential.

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Effect of acute altitude exposure on ventilatory thresholds in recreational athletes

Cited by 4 publications

References 25 publications

Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes

Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes

Effect of Acute Altitude Exposure on Anaerobic Threshold Assessed by a Novel Electrocardiogram-Based Method

An Integrated Approach to Assess the Potential of Forest Areas for Therapy Services

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