PMID- 29214461 OWN - NLM STAT- MEDLINE DCOM- 20180803 LR - 20181113 IS - 1439-6327 (Electronic) IS - 1439-6319 (Linking) VI - 118 IP - 2 DP - 2018 Feb TI - Co-ingestion of protein or a protein hydrolysate with carbohydrate enhances anabolic signaling, but not glycogen resynthesis, following recovery from prolonged aerobic exercise in trained cyclists. PG - 349-359 LID - 10.1007/s00421-017-3775-x [doi] AB - PURPOSE: The effect of carbohydrate (CHO), or CHO supplemented with either sodium caseinate protein (CHO-C) or a sodium caseinate protein hydrolysate (CHO-H) on the recovery of skeletal muscle glycogen and anabolic signaling following prolonged aerobic exercise was determined in trained male cyclists [n = 11, mean +/- SEM age 28.8 +/- 2.3 years; body mass (BM) 75.0 +/- 2.3 kg; VO(2peak) 61.3 +/- 1.6 ml kg(-1) min(-1)]. METHODS: On three separate occasions, participants cycled for 2 h at ~ 70% VO(2peak) followed by a 4-h recovery period. Isoenergetic drinks were consumed at + 0 and + 2 h of recovery containing either (1) CHO (1.2 g kg (-1) BM), (2) CHO-C, or (3) CHO-H (1.04 and 0.16 g kg(-1) BM, respectively) in a randomized, double-blind, cross-over design. Muscle biopsies from the vastus lateralis were taken prior to commencement of each trial, and at + 0 and + 4 h of recovery for determination of skeletal muscle glycogen, and intracellular signaling associated with protein synthesis. RESULTS: Despite an augmented insulin response following CHO-H ingestion, there was no significant difference in skeletal muscle glycogen resynthesis following recovery between trials. CHO-C and CHO-H co-ingestion significantly increased phospho-mTOR Ser(2448) and 4EBP1 Thr(37/46) versus CHO, with CHO-H displaying the greatest change in phospho-4EBP1 Thr(37/46). Protein co-ingestion, compared to CHO alone, during recovery did not augment glycogen resynthesis. CONCLUSION: Supplementing CHO with intact sodium caseinate or an insulinotropic hydrolysate derivative augmented intracellular signaling associated with skeletal muscle protein synthesis following prolonged aerobic exercise. FAU - Cogan, Karl E AU - Cogan KE AD - Institute for Sport and Health, University College Dublin, Dublin, Ireland. AD - Food for Health Ireland, University College Dublin, Dublin, Ireland. FAU - Evans, Mark AU - Evans M AD - School of Health and Human Performance, Dublin City University, Glasnevin, Dublin 9, Ireland. FAU - Iuliano, Enzo AU - Iuliano E AD - Institute for Sport and Health, University College Dublin, Dublin, Ireland. AD - Department of Medicine and Health Sciences, University of Molise, Campobasso, Italy. FAU - Melvin, Audrey AU - Melvin A AD - Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland. FAU - Susta, Davide AU - Susta D AD - School of Health and Human Performance, Dublin City University, Glasnevin, Dublin 9, Ireland. FAU - Neff, Karl AU - Neff K AD - Diabetes Complications Research Centre, Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland. FAU - De Vito, Giuseppe AU - De Vito G AD - Institute for Sport and Health, University College Dublin, Dublin, Ireland. FAU - Egan, Brendan AU - Egan B AUID- ORCID: 0000-0001-8327-9016 AD - Institute for Sport and Health, University College Dublin, Dublin, Ireland. brendan.egan@dcu.ie. AD - Food for Health Ireland, University College Dublin, Dublin, Ireland. brendan.egan@dcu.ie. AD - School of Health and Human Performance, Dublin City University, Glasnevin, Dublin 9, Ireland. brendan.egan@dcu.ie. LA - eng GR - TC2013001/Enterprise Ireland/ PT - Journal Article PT - Randomized Controlled Trial DEP - 20171206 PL - Germany TA - Eur J Appl Physiol JT - European journal of applied physiology JID - 100954790 RN - 0 (Caseins) RN - 0 (Dietary Carbohydrates) RN - 9005-79-2 (Glycogen) SB - IM MH - Adult MH - Caseins/administration & dosage/*metabolism/pharmacology MH - Dietary Carbohydrates/administration & dosage/*metabolism/pharmacology MH - *Exercise MH - Glycogen/*biosynthesis MH - Humans MH - Male MH - Muscle Fatigue MH - Muscle, Skeletal/*drug effects/metabolism/physiology MH - *Recovery of Function MH - Signal Transduction OTO - NOTNLM OT - Cycling OT - Nutrition OT - Protein synthesis OT - Sodium caseinate OT - Supplementation EDAT- 2017/12/08 06:00 MHDA- 2018/08/04 06:00 CRDT- 2017/12/08 06:00 PHST- 2017/06/17 00:00 [received] PHST- 2017/11/29 00:00 [accepted] PHST- 2017/12/08 06:00 [pubmed] PHST- 2018/08/04 06:00 [medline] PHST- 2017/12/08 06:00 [entrez] AID - 10.1007/s00421-017-3775-x [pii] AID - 10.1007/s00421-017-3775-x [doi] PST - ppublish SO - Eur J Appl Physiol. 2018 Feb;118(2):349-359. doi: 10.1007/s00421-017-3775-x. Epub 2017 Dec 6.