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https://www.readbyqxmd.com/read/26048645/functional-characteristics-of-milk-protein-concentrates-and-their-modification
#1
Hankie Uluko, Lu Liu, Jia-Ping Lv, Shu-Wen Zhang
A major deterrent to the usage of milk protein concentrate (MPC), a high-protein milk product with increasing demand as a food and sports drink ingredient, has been its poor functional characteristics when compared with other milk protein products such as whey protein concentrate and sodium caseinates. This review discusses the recent research on functional properties of MPC, focusing on factors that may contribute to the poor functional characteristics before, during, and after production. Current research, methods employed, and new understanding on the causes of poor solubility of MPC at mild temperatures (about 20°C) has been presented, including loss of solubility during storage as these areas have received unprecedented attention over the past decade, and also affects other useful functional properties of MPC, such as emulsifying properties, gelation, and foaming...
May 18, 2016: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/25979566/the-effect-of-a-whey-protein-supplement-dose-on-satiety-and-food-intake-in-resistance-training-athletes
#2
RANDOMIZED CONTROLLED TRIAL
Kristen L MacKenzie-Shalders, Nuala M Byrne, Gary J Slater, Neil A King
OBJECTIVE: Many athletes perform resistance training and consume dietary protein as a strategy to promote anabolic adaptation. Due to its high satiety value, the regular addition of supplemented dietary protein could plausibly displace other key macronutrients such as carbohydrate in an athlete's diet. This effect will be influenced by the form and dose of protein. Therefore, this study assessed the impact of liquid whey protein dose manipulation on subjective sensations of appetite and food intake in a cohort of athletes...
September 2015: Appetite
https://www.readbyqxmd.com/read/25949233/a-nutrition-and-conditioning-intervention-for-natural-bodybuilding-contest-preparation-case-study
#3
Scott Lloyd Robinson, Anneliese Lambeth-Mansell, Gavin Gillibrand, Abbie Smith-Ryan, Laurent Bannock
Bodybuilding competitions are becoming increasingly popular. Competitors are judged on their aesthetic appearance and usually exhibit a high level of muscularity and symmetry and low levels of body fat. Commonly used techniques to improve physique during the preparation phase before competitions include dehydration, periods of prolonged fasting, severe caloric restriction, excessive cardiovascular exercise and inappropriate use of diuretics and anabolic steroids. In contrast, this case study documents a structured nutrition and conditioning intervention followed by a 21 year-old amateur bodybuilding competitor to improve body composition, resting and exercise fat oxidation, and muscular strength that does not involve use of any of the above mentioned methods...
2015: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/25758255/the-addition-of-beta-hydroxy-beta-methylbutyrate-and-isomaltulose-to-whey-protein-improves-recovery-from-highly-demanding-resistance-exercise
#4
William J Kraemer, David R Hooper, Tunde K Szivak, Brian R Kupchak, Courtenay Dunn-Lewis, Brett A Comstock, Shawn D Flanagan, David P Looney, Adam J Sterczala, William H DuPont, J Luke Pryor, Hiu-Ying Luk, Jesse Maladoungdock, Danielle McDermott, Jeff S Volek, Carl M Maresh
OBJECTIVE: This study evaluated whether a combination of whey protein (WP), calcium beta-hydroxy-beta-methylbutyrate (HMB), and carbohydrate exert additive effects on recovery from highly demanding resistance exercise. METHODS: Thirteen resistance-trained men (age: 22.6 ± 3.9 years; height: 175.3 ± 12.2 cm; weight: 86.2 ± 9.8 kg) completed a double-blinded, counterbalanced, within-group study. Subjects ingested EAS Recovery Protein (RP; EAS Sports Nutrition/Abbott Laboratories, Columbus, OH) or WP twice daily for 2 weeks prior to, during, and for 2 days following 3 consecutive days of intense resistance exercise...
2015: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/25757896/supplemental-protein-in-support-of-muscle-mass-and-health-advantage-whey
#5
REVIEW
Michaela C Devries, Stuart M Phillips
Skeletal muscle is an integral body tissue playing key roles in strength, performance, physical function, and metabolic regulation. It is essential for athletes to ensure that they have optimal amounts of muscle mass to ensure peak performance in their given sport. However, the role of maintaining muscle mass during weight loss and as we age is an emerging concept, having implications in chronic disease prevention, functional capacity, and quality of life. Higher-protein diets have been shown to: (1) promote gains in muscle mass, especially when paired with resistance training; (2) spare muscle mass loss during caloric restriction; and (3) attenuate the natural loss of muscle mass that accompanies aging...
March 2015: Journal of Food Science
https://www.readbyqxmd.com/read/25624248/maldi-tof-ms-for-quality-control-of-high-protein-content-sport-supplements
#6
Cristina De Ceglie, Cosima D Calvano, Carlo G Zambonin
High protein content sport nutritional supplements are found as powder products containing, as ingredients, amino acids and proteins with important nutritional values as milk, soy and egg proteins. An EU Food Supplements Directive (2002) requires that supplements should be safe, both in dosages and in purity. It is important, then, to develop rapid and sensitive methods to be employed for the quality control of these substances. In this work, we apply, for the first time, matrix-assisted laser desorption ionization-mass spectrometry as a fast, reproducible and sensitive method for the quality control of sport nutritional supplements based on proteins...
June 1, 2015: Food Chemistry
https://www.readbyqxmd.com/read/25293431/effect-of-resistance-training-on-resting-metabolic-rate-and-its-estimation-by-a-dual-energy-x-ray-absorptiometry-metabolic-map
#7
RANDOMIZED CONTROLLED TRIAL
J C Aristizabal, D J Freidenreich, B M Volk, B R Kupchak, C Saenz, C M Maresh, W J Kraemer, J S Volek
BACKGROUND/OBJECTIVES: Fat-free mass (FFM) is the major predictor of resting metabolic rate (RMR). As protein supplementation during resistance training may augment gains in FFM, we investigated the effects of resistance training combined with protein supplementation on RMR and whether RMR responses could be estimated by a dual-energy X-ray absorptiometry (DXA) metabolic map. SUBJECTS/METHODS: Healthy adults completed a whole-body periodized resistance training program consisting of 96 workouts (~9 months)...
July 2015: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/25029703/effect-of-whey-protein-hydrolysate-on-performance-and-recovery-of-top-class-orienteering-runners
#8
RANDOMIZED CONTROLLED TRIAL
Mette Hansen, Jens Bangsbo, Jørgen Jensen, Bo Martin Bibby, Klavs Madsen
This trial aimed to examine the effect of whey protein hydrolysate intake before and after exercise sessions on endurance performance and recovery in elite orienteers during a training camp. Eighteen elite orienteers participated in a randomized controlled intervention trial during a 1-week training camp (13 exercise sessions). Half of the runners (PRO-CHO) ingested a protein drink before (0.3 g kg(-1)) and a protein-carbohydrate drink after (0.3 g protein kg(-1) and 1 g carbohydrate kg(-1)) each exercise session...
April 2015: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/25014731/considerations-for-protein-intake-in-managing-weight-loss-in-athletes
#9
REVIEW
Caoileann H Murphy, Amy J Hector, Stuart M Phillips
A large body of evidence now shows that higher protein intakes (2-3 times the protein Recommended Dietary Allowance (RDA) of 0.8 g/kg/d) during periods of energy restriction can enhance fat-free mass (FFM) preservation, particularly when combined with exercise. The mechanisms underpinning the FFM-sparing effect of higher protein diets remain to be fully elucidated but may relate to the maintenance of the anabolic sensitivity of skeletal muscle to protein ingestion. From a practical point of view, athletes aiming to reduce fat mass and preserve FFM should be advised to consume protein intakes in the range of ∼1...
2015: European Journal of Sport Science
https://www.readbyqxmd.com/read/24741960/-medical-and-biological-basis-of-the-recipe-of-cultured-milk-products-containing-rehydrating-beverage-for-the-athletes
#10
A L Novokshanova, E V Ozhiganova
According to the results of the physic-chemical research the composition of new isotonic rehydrating beverage has been presented and its nutritional and energy value has been calculated. As opposed to other sport drinks of this kind, a part of water in the new product is substituted by whey. From the physic-chemical standpoint whey is a complicated dispersed system in which hydrated proteins are in the form of colloidal solution, lipids are finely emulsified lipoprotein particles, carbohydrate and mineral components are close to the composition in the whole milk...
2013: Voprosy Pitaniia
https://www.readbyqxmd.com/read/24533082/alcohol-ingestion-impairs-maximal-post-exercise-rates-of-myofibrillar-protein-synthesis-following-a-single-bout-of-concurrent-training
#11
RANDOMIZED CONTROLLED TRIAL
Evelyn B Parr, Donny M Camera, José L Areta, Louise M Burke, Stuart M Phillips, John A Hawley, Vernon G Coffey
INTRODUCTION: The culture in many team sports involves consumption of large amounts of alcohol after training/competition. The effect of such a practice on recovery processes underlying protein turnover in human skeletal muscle are unknown. We determined the effect of alcohol intake on rates of myofibrillar protein synthesis (MPS) following strenuous exercise with carbohydrate (CHO) or protein ingestion. METHODS: In a randomized cross-over design, 8 physically active males completed three experimental trials comprising resistance exercise (8×5 reps leg extension, 80% 1 repetition maximum) followed by continuous (30 min, 63% peak power output (PPO)) and high intensity interval (10×30 s, 110% PPO) cycling...
2014: PloS One
https://www.readbyqxmd.com/read/24482589/protein-which-is-best
#12
REVIEW
Jay R Hoffman, Michael J Falvo
Protein intake that exceeds the recommended daily allowance is widely accepted for both endurance and power athletes. However, considering the variety of proteins that are available much less is known concerning the benefits of consuming one protein versus another. The purpose of this paper is to identify and analyze key factors in order to make responsible recommendations to both the general and athletic populations. Evaluation of a protein is fundamental in determining its appropriateness in the human diet...
September 2004: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/23765352/role-of-dietary-protein-in-post-exercise-muscle-reconditioning
#13
Luc J C van Loon
Dietary protein ingestion after exercise stimulates muscle protein synthesis, inhibits protein breakdown and, as such, stimulates net muscle protein accretion following resistance as well as endurance type exercise. Protein ingestion during and/or immediately after exercise has been suggested to facilitate the skeletal muscle adaptive response to each exercise session, resulting in more effective muscle reconditioning. A few basic guidelines can be defined with regard to the preferred type and amount of dietary protein and the timing by which protein should be ingested...
2013: Nestlé Nutrition Institute Workshop Series
https://www.readbyqxmd.com/read/23487491/effects-of-multi-ingredient-supplementation-on-resistance-training-in-young-males
#14
Mark Et Willems, Chris W Sallis, Jonathan A Haskell
Muscle strength and fatigue resistance increases with resistance training. Resistance training adaptations can be enhanced with single-ingredient or dual-ingredient supplementation but less is known about resistance training adaptations by multi-ingredient supplementation. We examined the effects of a commercial multi-ingredient supplement on resistance training adaptations for training-specific and non-training-specific tasks in young males. Male participants (n = 16, age 21±2 years, body mass 74.5±5.9 kg, body height 177±5 cm) had at least 1 year experience with resistance training exercises...
June 2012: Journal of Human Kinetics
https://www.readbyqxmd.com/read/23134234/carbohydrate-protein-coingestion-improves-multiple-sprint-running-performance
#15
RANDOMIZED CONTROLLED TRIAL
Jamie Highton, Craig Twist, Kevin Lamb, Ceri Nicholas
Acute carbohydrate-protein ingestion has been shown to improve steady-state endurance performance. This study compared the effects of carbohydrate and carbohydrate-protein ingestion on self-regulated simulated multiple-sprint sport performance. Nine participants completed two trials of a modified Loughborough Intermittent Shuttle Test involving 4 x 15 min blocks of regulated exercise followed by 2 x 15 min blocks of self-regulated exercise. Participants consumed 2.5 ml · kg(-1) of an 8% carbohydrate (CHO trial) or 6% carbohydrate plus 2% whey protein beverage (CHO-P trial) every 15 minutes...
2013: Journal of Sports Sciences
https://www.readbyqxmd.com/read/23127543/a-soy-whey-and-caseinate-blend-extends-postprandial-skeletal-muscle-protein-synthesis-in-rats
#16
D N Butteiger, M Cope, P Liu, R Mukherjea, E Volpi, B B Rasmussen, E S Krul
BACKGROUND & AIMS: Blends of dairy and soy protein are used in commercial sports nutrition products; however, no studies have systematically compared blends to isolated protein sources and their effects on muscle protein synthesis (MPS). Dairy whey protein (WP), soy protein isolate (SP), and two blends (Blend 1 and Blend 2) consisting of ratios of 50:25:25 and 25:50:25 for whey:caseinate:soy, respectively, were evaluated for their ability to affect MPS. METHODS: Male Sprague-Dawley rats were trained to eat 3 meals/day: a 4 g meal at 0700-0720 hours followed by ad lib feeding at 1300-1400 hours and 1800-1900 hours...
August 2013: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/23075562/milk-protein-and-the-restoration-of-fluid-balance-after-exercise
#17
REVIEW
Lewis James
Sweat is produced during exercise to help dissipate some of the extra heat produced due to an increase in metabolic rate. Inadequate drink ingestion during exercise means athletes finish exercise hypohydrated and when the time between exercise bouts is short, effective rehydration strategies will be necessary to prevent subsequent performance impairment. For complete rehydration, drink volume must be sufficient to replace sweat losses as well as the additional water losses during recovery. Once a sufficient volume of drink is ingested it is the drink composition that dictates the rehydration success of the drink...
2012: Medicine and Sport Science
https://www.readbyqxmd.com/read/23075559/impact-of-milk-consumption-and-resistance-training-on-body-composition-of-female-athletes
#18
REVIEW
Andrea R Josse, Stuart M Phillips
Resistance exercise (RE) preceding the provision of high-quality dairy protein supports muscle anabolism. Milk contains bioactive components, including two high-quality protein fractions, calcium and vitamin D, each of which has been shown modulate body composition (increasing lean mass and decreasing fat mass) under energy balance and hypoenergetic conditions. These dairy nutrients are also essential for skeletal health. Acutely, no study of RE and milk/whey consumption has been undertaken exclusively in female athletes, let alone women, nevertheless, studies with both men and women show increased lean mass accretion following milk/whey compared to soy/placebo...
2012: Medicine and Sport Science
https://www.readbyqxmd.com/read/22806076/whey-protein-before-and-during-resistance-exercise-has-no-effect-on-muscle-mass-and-strength-in-untrained-young-adults
#19
RANDOMIZED CONTROLLED TRIAL
Krissy D Weisgarber, Darren G Candow, Emelie S M Vogt
PURPOSE: To determine the effects of whey protein before and during resistance exercise (RE) on body composition and strength in young adults. METHODS: Participants were randomized to ingest whey protein (PRO; 0.3 g/kg protein; n = 9, 24.58 ± 1.8 yr, 88.3 ± 17.1 kg, 172.5 ± 8.0 cm) or placebo (PLA; 0.2 g/kg cornstarch maltodextrin + 0.1 g/kg sucrose; n = 8, 23.6 ± 4.4 yr, 82.6 ± 16.1 kg, 169.4 ± 9.2 cm) during RE (3 sets of 6-10 repetitions for 9 whole-body exercises), which was performed 4 d/wk for 8 wk...
December 2012: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/22301837/dietary-protein-to-support-muscle-hypertrophy
#20
Luc J C van Loon, Martin J Gibala
Intact protein, protein hydrolysates, and free amino acids are popular ingredients in contemporary sports nutrition, and have been suggested to augment post-exercise recovery. Protein and/or amino acid ingestion stimulates skeletal muscle protein synthesis, inhibits protein breakdown and, as such, stimulates muscle protein accretion following resistance and endurance type exercise. This has been suggested to lead to a greater adaptive response to each successive exercise bout, resulting in more effective muscle reconditioning...
2011: Nestlé Nutrition Institute Workshop Series
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