1. Effects of Postexercise Protein Intake on Muscle Mass and Strength During Resistance Training: Is There an Optimal Ratio Between Fast and Slow Proteins?
- Author
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Julien Louis, Nathalie Neveux, Marina Fabre, Alexandre Durguerian, Christophe Hausswirth, Odeline Molle, Xavier Bigard, Eve Tiollier, French Institute of Sport (INSEP), Research Department, Laboratory Sport, Expertise and Performance (EA7370) (SEP (EA7370)), Institut national du sport, de l'expertise et de la performance (INSEP), Laboratoire Motricité Humaine Expertise Sport Santé (LAMHESS), Université Côte d'Azur (UCA)-Université de Toulon (UTLN)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Complexité, Innovation, Activités Motrices et Sportives (CIAMS), Université Paris-Sud - Paris 11 (UP11)-Université d'Orléans (UO), Laboratoire de Nutrition, Université Paris Descartes - Paris 5 (UPD5), Agence Française de Lutte contre le Dopage (AFLD), Agence française de lutte contre le dopage, French Institute of Sport (INSEP), Research Department, Laboratory Sport, Expertise and Performance (EA7370) ( SEP (EA7370) ), Institut national du sport, de l'expertise et de la performance ( INSEP ), Laboratoire Motricité Humaine Expertise Sport Santé ( LAMHESS ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Université de Toulon ( UTLN ), Complexité, Innovation, Activités Motrices et Sportives ( CIAMS ), Université Paris-Sud - Paris 11 ( UP11 ) -Université d'Orléans ( UO ), Université Paris Descartes - Paris 5 ( UPD5 ), Agence Française de Lutte contre le Dopage ( AFLD ), Université Nice Sophia Antipolis (... - 2019) (UNS), and Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Université de Toulon (UTLN)
- Subjects
0301 basic medicine ,Adult ,Male ,medicine.medical_specialty ,Isometric and dynamic muscle strength ,[ SDV.AEN ] Life Sciences [q-bio]/Food and Nutrition ,[SHS.SPORT.PS]Humanities and Social Sciences/Sport/Sport physiology ,Medicine (miscellaneous) ,Muscle Proteins ,Isometric exercise ,[ SHS.SPORT ] Humanities and Social Sciences/Sport ,RC1200 ,03 medical and health sciences ,Young Adult ,Double-Blind Method ,Leucine ,Casein ,Internal medicine ,Blood plasma ,Lean Body Mass ,medicine ,Ingestion ,Humans ,Orthopedics and Sports Medicine ,Muscle Strength ,Muscle, Skeletal ,chemistry.chemical_classification ,[SHS.SPORT]Humanities and Social Sciences/Sport ,030109 nutrition & dietetics ,Nutrition and Dietetics ,Chemistry ,Milk soluble protein and Casein ,[ SHS.SPORT.PS ] Humanities and Social Sciences/Sport/Sport physiology ,Caseins ,Resistance Training ,General Medicine ,Milk Proteins ,Amino acid ,Bioavailability ,Endocrinology ,Lean body mass ,Body Composition ,[SDV.AEN]Life Sciences [q-bio]/Food and Nutrition - Abstract
While effects of the two classes of proteins found in milk (i.e., soluble proteins, including whey, and casein) on muscle protein synthesis have been well investigated after a single bout of resistance exercise (RE), the combined effects of these two proteins on the muscle responses to resistance training (RT) have not yet been investigated. Therefore, the aim of this study was to examine the effects of protein supplementation varying by the ratio between milk soluble proteins (fast-digested protein) and casein (slow-digested protein) on the muscle to a 9-week RT program. In a double-blind protocol, 31 resistance-trained men, were assigned to 3 groups receiving a drink containing 20g of protein comprising either 100% of fast protein (FP(100), n = 10), 50% of fast and 50% of slow proteins (FP(50), n = 11) or 20% of fast protein and 80% of casein (FP(20), n = 10) at the end of training bouts. Body composition (DXA), and maximal strength in dynamic and isometric were analyzed before and after RT. Moreover, blood plasma aminoacidemia kinetic after RE was measured. The results showed a higher leucine bioavailability after ingestion of FP(100) and FP(50) drinks, when compared with FP(20) (p< .05). However, the RT-induced changes in lean body mass (p < .01), dynamic (p < .01), and isometric muscle strength (p < .05) increased similarly in all experimental groups. To conclude, compared with the FP(20) group, the higher rise in plasma amino acids following the ingestion of FP(100) and FP(50) did not lead to higher muscle long-term adaptations.
- Published
- 2017