Braunsperger, A.* ; Bauer, M.* ; Brahim, C.B.* ; Seep, L.* ; Tischer, D.* ; Peitzsch, M.* ; Hasenauer, J. ; Figueroa, S.H.* ; Worthmann, A.* ; Heeren, J.* ; Dyar, K.A. ; Koehler, K.* ; Soriano-Arroquia, A.* ; Schönfelder, M.* ; Wackerhage, H.*
     
 
    
        
Effects of time-of-day on the noradrenaline, adrenaline, cortisol and blood lipidome response to an ice bath.
    
    
        
    
    
        
        Sci. Rep. 15:1263 (2025)
    
    
    
		
		
			
				While the effect of time-of-day (morning versus evening) on hormones, lipids and lipolysis has been studied in relation to meals and exercise, there are no studies that have investigated the effects of time-of-day on ice bath induced hormone and lipidome responses. In this crossover-designed study, a group of six women and six men, 26 ± 5 years old, 176 ± 7 cm tall, weighing 75 ± 10 kg, and a BMI of 23 ± 2 kg/m2 had an ice bath (8-12 °C for 5 min) both in the morning and evening on separate days. Absence from intense physical exercise, nutrient intake and meal order was standardized in the 24 h prior the ice baths to account for confounders such as diet or exercise. We collected venous blood samples before and after (5 min and 30 min) the ice baths to measure hormones (noradrenaline, adrenaline, and cortisol) and lipid levels in plasma via liquid chromatography mass spectrometry shotgun lipidomics. We found that ice baths in the morning increase plasma fatty acids more than in the evening. Overall plasma lipid composition significantly differed in-between the morning and evening, and only in the morning ice bathing is accompanied by significantly increased plasma fatty acids from 5.1 ± 2.2% to 6.0 ± 2.4% (P = 0.029) 5 min after and to 6.3 ± 3.1% (P = 0.008) 30 min after. Noradrenaline was not affected by time-of-day and increased significantly immediately after the ice baths in the morning by 127 ± 2% (pre: 395 ± 158 pg/ml, post 5 min: 896 ± 562 pg/ml, P = 0.025) and in the evening by 144 ± 2% (pre: 385 ± 146 pg/ml, post 5 min: 937 ± 547 pg/ml, P = 0.015). Cortisol was generally higher in the morning than in the evening (pre: 179 ± 108 pg/ml versus 91 ± 59 pg/ml, P = 0.013; post 5 min: 222 ± 96 pg/ml versus 101 ± 52 pg/ml, P = 0.001; post 30 min: 190 ± 96 pg/ml versus 98 ± 54 pg/ml, P = 0.009). There was no difference in the hormonal and lipidome response to an ice bath between women and men. The main finding of the study was that noradrenaline, adrenaline, cortisol and plasma lipidome responses are similar after an ice bath in the morning and evening. However, ice baths in the morning increase plasma fatty acids more than in the evening.
			
			
				
			
		 
		
			
				
					
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
    
        Typ der Hochschulschrift
        
    
 
    
        Herausgeber
        
    
    
        Schlagwörter
        Circadian Rhythm ; Cold Exposure ; Ice Bath ; Lipid Metabolism ; Lipolysis ; Noradrenaline; Brown Adipose-tissue; Salivary Cortisol; Circadian-rhythms; Water Immersion; Growth-hormone; Fat; Lipolysis; Muscle; Cold; Plasma
    
 
    
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        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2025
    
 
    
        Prepublished im Jahr 
        0
    
 
    
        HGF-Berichtsjahr
        2025
    
 
    
    
        ISSN (print) / ISBN
        2045-2322
    
 
    
        e-ISSN
        2045-2322
    
 
    
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	    Band: 15,  
	    Heft: 1,  
	    Seiten: ,  
	    Artikelnummer: 1263 
	    Supplement: ,  
	
    
 
  
        
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            Verlag
            Nature Publishing Group
        
 
        
            Verlagsort
            London
        
 
	
        
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        Peer reviewed
    
 
     
    
        POF Topic(s)
        30205 - Bioengineering and Digital Health
30201 - Metabolic Health
    
 
    
        Forschungsfeld(er)
        Enabling and Novel Technologies
Helmholtz Diabetes Center
    
 
    
        PSP-Element(e)
        G-553800-001
G-502594-001
    
 
    
        Förderungen
        Technische Universitt Mnchen (1025)
DFG (BATenergy)
    
 
    
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        Erfassungsdatum
        2025-03-19