Boa noite a todos!
Segue 3 artigos científicos sobre suplementação de leite achocolatado e melhora da performance física. Muito interessante o tema. Boa leitura.
J Strength Cond Res. 2011 May;25(5):1210-24.
Postexercise carbohydrate-protein supplementation improves subsequent exercise performance and intracellular signaling for protein synthesis.
Ferguson-Stegall L, McCleave EL, Ding Z, Doerner PG 3rd, Wang B, Liao YH, Kammer L, Liu Y, Hwang J, Dessard BM, Ivy JL.
Source
Exercise Physiology and Metabolism Laboratory, Department of Kinesiology, University of Texas at Austin, Austin, Texas, USA.
Abstract
Postexercise carbohydrate-protein (CHO + PRO) supplementation has been proposed to improve recovery and subsequent endurance performance compared to CHO supplementation. This study compared the effects of a CHO + PRO supplement in the form of chocolate milk (CM), isocaloric CHO, and placebo (PLA) on recovery and subsequent exercise performance. Ten cyclists performed 3 trials, cycling 1.5 hours at 70% VO₂max plus 10 minutes of intervals. They ingested supplements immediately postexercise and 2 hours into a 4-hour recovery. Biopsies were performed at recovery minutes 0, 45, and 240 (R0, R45, REnd). Postrecovery, subjects performed a 40-km time trial (TT). The TT time was faster in CM than in CHO and in PLA (79.43 ± 2.11 vs. 85.74 ± 3.44 and 86.92 ± 3.28 minutes, p ≤ 0.05). Muscle glycogen resynthesis was higher in CM and in CHO than in PLA (23.58 and 30.58 vs. 7.05 μmol·g⁻¹ wet weight, p ≤ 0.05). The mammalian target of rapamycin phosphorylation was greater at R45 in CM than in CHO or in PLA (174.4 ± 36.3 vs. 131.3 ± 28.1 and 73.7 ± 7.8% standard, p ≤ 0.05) and at REnd in CM than in PLA (94.5 ± 9.9 vs. 69.1 ± 3.8%, p ≤ 0.05). rpS6 phosphorylation was greater in CM than in PLA at R45 (41.0 ± 8.3 vs. 15.3 ± 2.9%, p ≤ 0.05) and REnd (16.8 ± 2.8 vs. 8.4 ± 1.9%, p ≤ 0.05). FOXO3A phosphorylation was greater at R45 in CM and in CHO than in PLA (84.7 ± 6.7 and 85.4 ± 4.7 vs. 69.2 ± 5.5%, p ≤ 0.05). These results indicate that postexercise CM supplementation can improve subsequent exercise performance and provide a greater intracellular signaling stimulus for PRO synthesis compared to CHO and placebo.
PMID: 21522069 [PubMed - indexed for MEDLINE]
Med Sci Sports Exerc. 2011 Sep 7. [Epub ahead of print]
Chocolate Milk & Endurance Exercise Recovery: Protein Balance, Glycogen & Performance.
Lunn WR, Pasiakos SM, Colletto MR, Karfonta KE, Carbone JW, Anderson JM, Rodriguez NR.
Source
1Exercise Science Department, Southern Connecticut State University, New Haven, CT, Departments of 2Nutritional Sciences and 3Kinesiology, University of Connecticut, Storrs, CT, and 4School of Health Sciences, Eastern Michigan University, Ypsilanti, MI.
Abstract
PURPOSE: This study examined effects of fat-free chocolate milk consumption on kinetic and cellular markers of protein turnover, muscle glycogen, and performance during recovery from endurance exercise. METHODS:Male runners participated in 2 trials separated by 1 wk and consumed either fat-free chocolate milk (MILK) or a non-nitrogenous, isocaloric, carbohydrate control beverage (CON) after a 45-min run at 65% of VO2peak. Postexercise muscle protein fractional synthetic rate (FSR) and whole body protein turnover were determined during 3 h of recovery using muscle biopsies and primed, constant infusions of L-[ring-H5]phenylalanine and L-[1-C]leucine, respectively. Phosphorylation of translational signaling proteins and activity of proteolytic molecules were determined using Western blotting and enzymatic activity assays. Muscle glycogen was quantified and treadmill time to exhaustion (TTE) was determined following the recovery period. RESULTS: Consuming MILK postexercise resulted in higher mixed muscle FSR with lower whole body proteolysis and synthesis compared to CON ((p ≤ 0.05). Phosphorylation of eIF4E-BP1 and FOXO3a was higher for MILK (p<0.01), whereas Akt phosphorylation was lower during recovery regardless of dietary treatment (p<0.05). Enzymatic activity assays indicated lower caspase-3 activity during recovery for MILK (p<0.01) and higher 26S proteasome activity for CON (p<0.01). Muscle glycogen was not affected by either dietary treatment; however, TTE was greater for MILK than CON (p<0.05). CONCLUSION: The effects of consumption of fat-free chocolate milk following endurance exercise on FSR, signaling molecules of skeletal muscle protein turnover, leucine kinetics, and performance measures suggest unique benefits of milk compared to a carbohydrate only beverage.
J Nutr Metab. 2011;2011:623182. Epub 2011 Jun 9.
Aerobic exercise training adaptations are increased by postexercise carbohydrate-protein supplementation.
Ferguson-Stegall L, McCleave E, Ding Z, Doerner Iii PG, Liu Y, Wang B, Healy M, Kleinert M, Dessard B, Lassiter DG, Kammer L, Ivy JL.
Source
Exercise Physiology and Metabolism Laboratory, Department of Kinesiology and Health Education, University of Texas at Austin, Austin, TX 78712, USA.
Abstract
Carbohydrate-protein supplementation has been found to increase the rate of training adaptation when provided postresistance exercise. The present study compared the effects of a carbohydrate and protein supplement in the form of chocolate milk (CM), isocaloric carbohydrate (CHO), and placebo on training adaptations occurring over 4.5 weeks of aerobic exercise training. Thirty-two untrained subjects cycled 60 min/d, 5 d/wk for 4.5 wks at 75-80% of maximal oxygen consumption (VO(2) max). Supplements were ingested immediately and 1 h after each exercise session. VO(2) max and body composition were assessed before the start and end of training. VO(2) max improvements were significantly greater in CM than CHO and placebo. Greater improvements in body composition, represented by a calculated lean and fat mass differential for whole body and trunk, were found in the CM group compared to CHO. We conclude supplementing with CM postexercise improves aerobic power and body composition more effectively than CHO alone.
Nenhum comentário:
Postar um comentário