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    Physiology and Pathophysiology of Marathon Running: A narrative Review
    (Springer Nature, 2025-01-27) Braschler, Lorin; Nikolaidis, Pantelis T.; Thuany, Mabliny; Chlíbková, Daniela; Rosemann, Thomas; Weiss, Katja; Wilhelm, Matthias; Knechtle, Beat
    Marathon training and running have many beneficial effects on human health and physical fitness; however, they also pose risks. To date, no comprehensive review regarding both the benefits and risks of marathon running on different organ systems has been published.
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    The prevalence of exercise-associated hyponatremia in 24-hour ultra-mountain bikers, 24-hour ultra-runners and multi-stage ultra-mountain bikers in the Czech Republic
    (BioMed Central, 2014-02-14) Chlíbková, Daniela
    To assess the prevalence of exercise-associated hyponatremia (EAH) in two 24-hour mountain bike (MTB) (R1,R2), one 24-hour running (R3) and one multi-stage MTB (R4) races held in the Czech Republic in a cluster of four cross-sectional studies. Methods In 27 ultra-mountain bikers (ultra-MTBers), 12 ultra-runners, and 14 multi-stage MTBers, fluid intake, changes in body mass, hematocrit, plasma volume, plasma [Na+], plasma [K+], plasma osmolality, urine [Na+], urine [K+], urine specific gravity, urine osmolality, K+/Na+ ratio in urine, transtubular potassium gradient and glomerular filtration rate were measured and calculated. The use of non-steroidal anti-inflammatory drugs and symptoms of EAH were recorded using post-race questionnaires.
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    Body Composition Changes During a 24-h Winter Mountain Running Race Under Extremely Cold Conditions
    (Frontiers, 2019-05-14) Chlíbková, Daniela; Žákovská, Alena; Rosemann, Thomas; Knechtle, Beat; Bednář, Josef
    Background: To date, no study has focused on body composition characteristics and on parameters associated with skeletal muscle damage and renal function in runners participating in a 24-h winter race held under extremely cold environmental conditions (average temperature of -14.3 degrees C). Methods: Anthropometric characteristics, plasma urea (PU), plasma creatinine (Pcr), creatine kinase (CK), plasma volume (PV) and total body water (TBW) were assessed pre- and post-race in 20 finishers (14 men and 6 women). Results: In male runners, body mass (BM) (p = 0.003) and body fat (BF) (p = 0.001) decreased [-1.1 kg (-1.4%) and -1.1 kg (-13.4%), respectively]; skeletal muscle mass (SM) and TBW remained stable (p > 0.05). In female runners, BF decreased (p = 0.036) [-1.3 kg (-7.8%)] while BM, SM and TBW remained stable (p > 0.05). The change (Delta) in BM was not related to Delta BF; however, Delta BM was related to Delta SM [r = 0.58, p = 0.007] and Delta TBW (r = 0.59, p = 0.007). Delta SM correlated with Delta TBW (r = 0.51, p = 0.021). Moreover, Delta BF was negatively associated with Delta SM (r = -0.65, p = 0.002). PV (p < 0.001), CK (p < 0.001), Pcr (p = 0.004) and PU (p < 0.001) increased and creatinine clearance (CrCl) decreased (p = 0.002). The decrease in BM was negatively related to the increase in CK (r = -0.71, p < 0.001). Delta Pcr was positively related to Delta PU (r = 0.64, p = 0.002). The decrease in CrCl was negatively associated with the increase in both PU (r = -0.72, p < 0.001) and CK (r = -0.48, p = 0.032). Conclusion: The 24-h running race under extremely cold conditions led to a significant BF decrease, whereas SM and TBW remained stable in both males and females. Nevertheless, the increase in CK, Pcr and PU was related to the damage of SM with transient impaired renal function.
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    Nutrition habits in 24-hour mountain bike racers
    (SpringerPlus, 2014-12-20) Chlíbková, Daniela
    We investigated seventy-four ultra-mountain bikers (MTBers) competing in the solo category in the first descriptive field study to detail nutrition habits and the most common food before during and after the 24 hour race using questionnaires
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    Rhabdomyolysis and exercise-associated hyponatremia in ultra-bikers and ultra-runners
    (BioMed Central, 2015-06-25) Chlíbková, Daniela
    Hyponatremic ultra-athletes tended to develop exercise-induced rhabdomyolysis more frequently than normonatremic ultra-athletes. Ultra-runners tended to develop rhabdomyolysis more frequently than mountain bikers. We found no association between post-race plasma [Na+] and creatine kinase concentration in hyponatremic or normonatremic ultra-athletes.