PMID- 37892449 OWN - NLM STAT- MEDLINE DCOM- 20231030 LR - 20231030 IS - 2072-6643 (Electronic) IS - 2072-6643 (Linking) VI - 15 IP - 20 DP - 2023 Oct 16 TI - Isolate Whey Protein Promotes Fluid Balance and Endurance Capacity Better Than Isolate Casein and Carbohydrate-Electrolyte Solution in a Warm, Humid Environment. LID - 10.3390/nu15204374 [doi] LID - 4374 AB - Protein ingestion is known to enhance post-exercise hydration. Whether the type of protein (i.e., whey, casein) can alter this response is unknown. Accordingly, this study aimed to compare the effects of the addition of milk-derived whey isolate or casein protein to carbohydrate-electrolyte (CE) drinks on post-exercise rehydration and endurance capacity. Thirty male soldiers (age: 24 +/- 2.1 y; VO(2max): 49.3 +/- 4.7 mL/kg/min) were recruited. Upon losing ~2.2% of body mass by running in warm and humid conditions (32.3 degrees C, 76% relative humidity [RH]), participants ingested either a CE solution (66 g/L carbohydrate [CHO]), or CE plus isolate whey protein (CEW, 44 g/L CHO, 22 g/L isolate whey), or CE plus isolate casein protein (CEC, 44 g/L CHO, 22 g/L isolate casein) beverage in a volume equal to 150% of body mass loss. At the end of the 3 h rehydration period, a positive fluid balance was higher with CEW (0.22 L) compared to CEC (0.19 L) and CE (0.12 L). Overall mean fluid retention was higher in CEW (80.35%) compared with the CE (76.67%) and CEC trials (78.65%). The time of the endurance capacity test [Cooper 2.4 km (1.5 miles) run test] was significantly higher in CEC (14.25 +/- 1.58 min) and CE [(12.90 +/- 1.01 min; (p = 0.035)] than in CEW [(11.40 +/- 1.41 min); (p = 0.001)]. The findings of this study indicate that the inclusion of isolate whey protein in a CE solution yields superior outcomes in terms of rehydration and enhanced endurance capacity, as compared to consuming the CE solution alone or in conjunction with isolate casein protein. FAU - Gholizadeh, Mahdi AU - Gholizadeh M AUID- ORCID: 0000-0001-5398-2683 AD - Exercise Physiology Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran 1435916471, Iran. FAU - Shakibaee, Abolfazl AU - Shakibaee A AD - Exercise Physiology Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran 1435916471, Iran. FAU - Bagheri, Reza AU - Bagheri R AUID- ORCID: 0000-0003-1433-2906 AD - Department of Exercise Physiology, University of Isfahan, Isfahan 81746-73441, Iran. FAU - Camera, Donny M AU - Camera DM AD - Department of Health and Biostatistics, Swinburne University, Melbourne, VIC 3122, Australia. FAU - Shirvani, Hossein AU - Shirvani H AD - Exercise Physiology Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran 1435916471, Iran. FAU - Dutheil, Frederic AU - Dutheil F AUID- ORCID: 0000-0002-1468-6029 AD - Physiological and Psychosocial Stress, CNRS UMR 6024, LaPSCo, University Clermont Auvergne, Witty Fit, 63000 Clermont-Ferrand, France. AD - Preventive and Occupational Medicine, University Hospital of Clermont-Ferrand (CHU), 63000 Clermont-Ferrand, France. LA - eng PT - Journal Article DEP - 20231016 PL - Switzerland TA - Nutrients JT - Nutrients JID - 101521595 RN - 0 (Whey Proteins) RN - 0 (Caseins) RN - 0 (Dietary Carbohydrates) RN - 0 (Electrolytes) SB - IM MH - Male MH - Humans MH - Young Adult MH - Adult MH - Whey Proteins MH - *Caseins MH - *Dietary Carbohydrates/pharmacology MH - Exercise/physiology MH - Water-Electrolyte Balance MH - Electrolytes MH - Physical Endurance PMC - PMC10610234 OTO - NOTNLM OT - fluid retention OT - net fluid balance OT - rehydration COIS- The authors declare no conflict of interest. EDAT- 2023/10/28 11:46 MHDA- 2023/10/30 06:46 PMCR- 2023/10/16 CRDT- 2023/10/28 01:04 PHST- 2023/09/19 00:00 [received] PHST- 2023/10/11 00:00 [revised] PHST- 2023/10/14 00:00 [accepted] PHST- 2023/10/30 06:46 [medline] PHST- 2023/10/28 11:46 [pubmed] PHST- 2023/10/28 01:04 [entrez] PHST- 2023/10/16 00:00 [pmc-release] AID - nu15204374 [pii] AID - nutrients-15-04374 [pii] AID - 10.3390/nu15204374 [doi] PST - epublish SO - Nutrients. 2023 Oct 16;15(20):4374. doi: 10.3390/nu15204374.