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Promoting training adaptations through nutritional interventions
, 2005
"... Training and nutrition are highly interrelated in that optimal adaptation to the demands of repeated training sessions typically requires a diet that can sustain muscle energy reserves. As nutrient stores (i.e. muscle and liver glycogen) play a predominant role in the performance of prolonged, inten ..."
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Training and nutrition are highly interrelated in that optimal adaptation to the demands of repeated training sessions typically requires a diet that can sustain muscle energy reserves. As nutrient stores (i.e. muscle and liver glycogen) play a predominant role in the performance of prolonged, intense, intermittent exercise typical of the patterns of soccer match-play, and in the replenishment of energy reserves for subsequent training sessions, the extent to which acutely altering substrate availability might modify the training impulse has been a key research area among exercise physiologists and sport nutritionists for several decades. Although the major perturbations to cellular homeostasis and muscle substrate stores occur during exercise, the activation of several major signalling pathways important for chronic training adaptations take place during the first few hours of recovery, returning to baseline values within 24 h after exercise. This has led to the paradigm that many chronic training adaptations are generated by the cumulative effects of the transient events that occur during recovery from each (acute) exercise bout. Evidence is accumulating that nutrient supplementation can serve as a potent modulator of many of the acute responses to both endurance and resistance training. In this article, we review the molecular and cellular events that occur in skeletal muscle during exercise and subsequent recovery, and the potential for nutrient supplementation (e.g. carbohydrate, fat, protein) to affect many of the adaptive responses to training.
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, 2016
"... Minimal whey protein with carbohydrate stimulates muscle protein synthesis following resistance exercise in trained young men ..."
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Minimal whey protein with carbohydrate stimulates muscle protein synthesis following resistance exercise in trained young men
Role of Protein and Hydrolysates Before Exercise
"... Adaptations to exercise training are determined by the response of metabolic and molecular mechanisms that determine changes in proteins. The type, intensity, and duration of exercise, as well as nutrition, determine these responses. The importance of protein, in the form of intact proteins, hydroly ..."
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Adaptations to exercise training are determined by the response of metabolic and molecular mechanisms that determine changes in proteins. The type, intensity, and duration of exercise, as well as nutrition, determine these responses. The importance of protein, in the form of intact proteins, hydrolysates, or free amino acids, for exercise adaptations is widely recognized. Exercise along with protein intake results in accumulation of proteins that influence training adaptations. The total amount of protein necessary to optimize adaptations is less important than the type of protein, timing of protein intake, and the other nutrients ingested concurrently with the protein. Acute metabolic studies offer an important tool to study the responses of protein balance to various exercise and nutritional interven-tions. Recent studies suggest that ingestion of free amino acids plus carbohydrates before exercise results in a superior anabolic response to exercise than if ingested after exercise. However, the difference between pre- and postexercise ingestion of intact proteins is not apparent. Thus, the anabolic response to exercise plus protein ingestion seems to be determined by the interaction of timing of nutrient intake
Effects of Protein Supplementation on Muscular Performance and Resting Hormonal Changes in Collegiate Athletic
"... Abstract Objective: The effect of protein supplementation on athletic performance and hormonal changes was examined in 32 experienced collegiate strength/power athletes participating in a 12-week resistance training program. Method: Subjects were randomly assigned to either a protein supplement (PR ..."
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Abstract Objective: The effect of protein supplementation on athletic performance and hormonal changes was examined in 32 experienced collegiate strength/power athletes participating in a 12-week resistance training program. Method: Subjects were randomly assigned to either a protein supplement (PR; n = 22) or a placebo (PL; n = 10) group. During each testing session subjects were assessed for strength (one repetition maximum bench press and squat), power (Wingate anaerobic power test) and body composition. Resting blood samples were analyzed at weeks 0 (PRE), 6 (MID) and 12 (POST) for total testosterone, cortisol, growth hormone, and IGF-1. Result: There was seen no difference in energy intake between PR and PL (3034 ± 209 kcal and 3130 ± 266 kcal, respectively), but a significant difference in daily protein intake was seen between PR (2.00 g·kg body mass[BM]-1·d-1) and PL (1.24 g·kgBM-1·d-1). A greater change (p < 0.05) in the 1-RM squat was seen in PR (23.5 ± 13.6 kg) compared to PL (9.1 ± 11.9 kg). No other significant strength or power differences were seen between the groups. Cortisol concentrations were Sheibani, SH ( ) sh.sheybany@gmail.com significantly lower at MID for PL and this difference was significantly different than PR. No significant changes were noted in resting growth hormone or IGF-1 concentrations in either group. Conclusion: Although protein supplementation appeared to augment lower body strength development, similar upper body strength, anaerobic power and lean tissue changes do not provide clear evidence supporting the efficacy of a 12-week protein supplementation period in experienced resistance trained athletes.
1 EFFECTS OF SUPPLEMENT-TIMING AND RESISTANCE EXERCISE ON SKELETAL MUSCLE HYPERTROPHY
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Key Words: ergogenic aids, sports supplements, protein DIETARY PROTEIN AND PROTEIN SUPPLEMENTS
, 2005
"... This is the third in a series of six articles to discuss the major classes of dietary supplements (vitamins; minerals; amino acids; herbs or botanicals; metabolites, constituents/extracts, or combinations). The major focus is on efficacy of such dietary supplements to enhance exercise or sport perfo ..."
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This is the third in a series of six articles to discuss the major classes of dietary supplements (vitamins; minerals; amino acids; herbs or botanicals; metabolites, constituents/extracts, or combinations). The major focus is on efficacy of such dietary supplements to enhance exercise or sport performance. Journal of the
Copyright @ 2006 by the American College of Sports Medicine. Unauthorized reproduction of this article is prohibited. Effects of Supplement Timing and Resistance Exercise on Skeletal Muscle Hypertrophy
"... CRIBB, P. J., and A. HAYES. Effects of Supplement Timing and Resistance Exercise on Skeletal Muscle Hypertrophy. Med. Sci. ..."
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CRIBB, P. J., and A. HAYES. Effects of Supplement Timing and Resistance Exercise on Skeletal Muscle Hypertrophy. Med. Sci.
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"... Effects of protein supplementation on muscular performance and resting hormonal changes in college football players ..."
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Effects of protein supplementation on muscular performance and resting hormonal changes in college football players
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"... 6Improving muscle mass: response of muscle metabolism to exercise, nutrition and anabolic agents ..."
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6Improving muscle mass: response of muscle metabolism to exercise, nutrition and anabolic agents