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Different dietary proteins affect whole body protein anabolism and accretion and therefore, have the potential to influence results obtained from resistance training. This study examined the effects of supplementation with two proteins, hydrolyzed whey isolate (WI) and casein (C), on strength, body composition, and plasma glutamine levels during a 10 wk, supervised resistance training program. In a double-blind protocol, 13 male, recreational bodybuilders supplemented their normal diet with either WI or C (1.5 gm/kg body wt/d) for the duration of the program. Strength was assessed by 1-RM in three exercises (barbell bench press, squat, and cable pull-down). Body composition was assessed by dual energy X-ray absorptiometry. Plasma glutamine levels were determined by the enzymatic method with spectrophotometric detection. All assessments occurred in the week before and the week following 10 wk of training. Plasma glutamine levels did not change in either supplement group following the intervention. The WI group achieved a significantly greater gain (P < 0.01) in lean mass than the C group (5.0 ± 0.3 vs. 0.8 ± 0.4 kg for WI and C, respectively) and a significant (P < 0.05) change in fat mass (-1.5 ± 0.5 kg) compared to the C group (+0.2 ± 0.3 kg). The WI group also achieved significantly greater (P < 0.05) improvements in strength compared to the C group in each assessment of strength. When the strength changes were expressed relative to body weight, the WI group still achieved significantly greater (P < 0.05) improvements in strength compared to the C group. [ABSTRACT FROM AUTHOR]

The article discusses the study conducted regarding the impact of caffeine and ephedra on the maximal strength and power of the resistance-trained athletes. The study aims to investigate the effects of the ingesting caffeine or the combination of caffeine and ephedra as the International Olympic Committee allowed the athletes to use both substances. The result shows that both supplementations cannot enhanced muscle strength and anaerobic exercise performances.

The article presents a discussion on the effects of protein-carbohydrate supplements containing creatine monohydrate on resistance training. It provides a comparison between the effects of creatine-protein-carbohydrate supplements and supplements containing similar amounts of nitrogen and energy on body composition and muscle fiber hypertrophy. The experiment included resistance-trained male subjects who were put into a supervised ten-week resistance program and used either protein only, protein-carbohydrate, or creatine-protein-carbohydrate supplements. Results of the experiment showed that subjects using creatine-protein-carbohydrate supplements had more strength and muscle fiber hypertrophy.

The article presents a study on the effects of whey isolate, creatine and resistance training on muscle hypertrophy. The purpose of the study was to examine the effects of two popular supplements such as whey protein (WP) and creatine monohydrate (CrM) on body composition, muscle strength, fiber-specific hypertrophy and contractile protein accrual during training. The hypertrophy responses within the groups varied. These differences in skeletal muscle morphology may have important implications for various populations.

The article reports on the effects of supplement timing and resistance exercise on skeletal muscle hypertrophy. The aim of this research is to determine the effects of supplement timing compared with supplementation in the period not close to the workout on muscle-fiber hypertrophy, strength, and body composition during a 10-week RE program. In proceeding with the study, resistance-trained males were matched for strength and positioned into two groups, the PRE-POST group consumed a supplement containing protein/creatine/glucose, while the MOR-EVE group consumed the same in the morning and late evening.