Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes
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...
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MDPI AG
2023-07-01
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| Series: | Nutrients |
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| Online Access: | https://www.mdpi.com/2072-6643/15/15/3333 |
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| author | Anna Strüven Stefan Brunner Georges Weis Christopher Stremmel Daniel Teupser Jenny Schlichtiger Korbinian Lackermair |
| author_facet | Anna Strüven Stefan Brunner Georges Weis Christopher Stremmel Daniel Teupser Jenny Schlichtiger Korbinian Lackermair |
| author_sort | Anna Strüven |
| collection | DOAJ |
| description | 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] %; <i>p</i> < 0.01) and an increase of urine osmolality (767 [694; 839] vs. 537 [445; 629] mosm/kg; <i>p</i> < 0.01). Hypohydration was without alterations of electrolytes, serum osmolality or hematocrit. The oxygen uptake was significantly lower after hypohydration (−4.8%; <i>p</i> = 0.02 at ventilatory threshold1; −2.0%; <i>p</i> < 0.01 at maximum power), with a corresponding decrease of minute ventilation (−4% at ventilatory threshold1; <i>p</i> = 0.01, −3.3% at maximum power; <i>p</i> < 0.01). The power output was lower in hypohydration (−6.8%; <i>p</i> < 0.01 at ventilatory threshold1; −2.2%; <i>p</i> = 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. |
| first_indexed | 2024-03-11T00:20:04Z |
| format | Article |
| id | doaj.art-f6516626f47d423f8bff969751466e26 |
| institution | Directory Open Access Journal |
| issn | 2072-6643 |
| language | English |
| last_indexed | 2024-03-11T00:20:04Z |
| publishDate | 2023-07-01 |
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| series | Nutrients |
| spelling | doaj.art-f6516626f47d423f8bff969751466e262023-11-18T23:23:09ZengMDPI AGNutrients2072-66432023-07-011515333310.3390/nu15153333Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational AthletesAnna Strüven0Stefan Brunner1Georges Weis2Christopher Stremmel3Daniel Teupser4Jenny Schlichtiger5Korbinian Lackermair6Department of Medicine I, University Hospital Munich, Ludwig Maximilian University, Marchioninistr. 15, 81377 Munich, GermanyDepartment of Medicine I, University Hospital Munich, Ludwig Maximilian University, Marchioninistr. 15, 81377 Munich, GermanyDepartment of Medicine I, University Hospital Munich, Ludwig Maximilian University, Marchioninistr. 15, 81377 Munich, GermanyDepartment of Medicine I, University Hospital Munich, Ludwig Maximilian University, Marchioninistr. 15, 81377 Munich, GermanyInstitute of Laboratory Medicine, University Hospital Ludwig Maximilian University, Marchioninistr. 15, 81377 Munich, GermanyDepartment of Medicine I, University Hospital Munich, Ludwig Maximilian University, Marchioninistr. 15, 81377 Munich, GermanyDepartment of Medicine I, University Hospital Munich, Ludwig Maximilian University, Marchioninistr. 15, 81377 Munich, GermanyBackground: 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] %; <i>p</i> < 0.01) and an increase of urine osmolality (767 [694; 839] vs. 537 [445; 629] mosm/kg; <i>p</i> < 0.01). Hypohydration was without alterations of electrolytes, serum osmolality or hematocrit. The oxygen uptake was significantly lower after hypohydration (−4.8%; <i>p</i> = 0.02 at ventilatory threshold1; −2.0%; <i>p</i> < 0.01 at maximum power), with a corresponding decrease of minute ventilation (−4% at ventilatory threshold1; <i>p</i> = 0.01, −3.3% at maximum power; <i>p</i> < 0.01). The power output was lower in hypohydration (−6.8%; <i>p</i> < 0.01 at ventilatory threshold1; −2.2%; <i>p</i> = 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.https://www.mdpi.com/2072-6643/15/15/3333preparticipating hypohydrationexercise capacityrecreational athletesexercisedehydrationrecreational athletes |
| spellingShingle | Anna Strüven Stefan Brunner Georges Weis Christopher Stremmel Daniel Teupser Jenny Schlichtiger Korbinian Lackermair Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes Nutrients preparticipating hypohydration exercise capacity recreational athletes exercise dehydration recreational athletes |
| title | Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes |
| title_full | Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes |
| title_fullStr | Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes |
| title_full_unstemmed | Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes |
| title_short | Impact of Preparticipating Hypohydration on Cardiopulmonary Exercise Capacity in Ambitious Recreational Athletes |
| title_sort | impact of preparticipating hypohydration on cardiopulmonary exercise capacity in ambitious recreational athletes |
| topic | preparticipating hypohydration exercise capacity recreational athletes exercise dehydration recreational athletes |
| url | https://www.mdpi.com/2072-6643/15/15/3333 |
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