爱达荷州立大学中国学生学者联谊会

Chinese Association of Idaho State University (CAISU)

However, as the response lasts for two days, Bohe` J., in a dose-response study published in Journal of Physiology, 2003, recommended that repeated supplementation with three to six grams of high quality protein during the 48 hours after a workout can optimize the protein synthetic response without topping out the protein synthetic enzyme systems. Combining protein supplements with adequate carbohydrate (35g of sucrose with every 6g of protein) is also helpful. The carbohydrate acts as fuel for the muscle fibers sparing the protein for growth.Research into the response of untrained strength athletes has come up with surprising results. The demand for proteins increases in both the trained and the untrained states. However, the relative protein requirement of an untrained athlete per kg per day often exceeds the trained counterpart.

The initial phase of resistance training is exemplified by rapid growth and hypertrophy of skeletal muscles, before it hits the plateau. Another factor is the relative inefficiency of the protein synthetic machinery in the untrained state. Well-formulated protein supplements are thus necessary to sustain even the early phases of resistance training.This is not to say that the protein requirements of the trained strength athlete are comparable to the sedentary population. By the time the maintenance phase of resistance training is reached, the lean body mass would have expanded exponentially. The total quantity of proteins that are broken down and reformed during protein turnover in a trained strength athlete is still many times higher than normal levels.

Philips SM, in his review on Protein Requirements in Strength Athletes, states that this requirement may be as high as 1.5 times baseline levels.The hunt then is for a high quality protein diet that would supply all the essential amino acids required. Considering the various biochemical principles discussed, this protein supplementation should be rapidly absorbable so that amino acids delivery can be accurately timed to the post-workout period. Rapid absorption would also enable multiple doses of the protein supplement to be taken during this period. The protein supplement also needs to be in small quantities (3 to 6g) to prevent saturating protein synthesis pathways and to minimize protein waste through excretion.

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