DO ATHLETES NEED MORE DIETARY-PROTEIN AND AMINO-ACIDS

The current recommended daily allowance (RDA) for protein is based pri marily on data derived from subjects whose lifestyles were essentially sedentary. More recent well-designed studies that have employed eithe r the classic nitrogen balance approach or the more technically diffic ult metabolic tracer technique indicate that overall protein needs (as well as needs for some specific individual amino acids) are probably increased for those who exercise regularly. Although the roles of the additionally required dietary protein and amino acids are likely to be quite different for those who engage in endurance exercise (protein r equired as an auxiliary fuel source) as opposed to strength exercise ( amino acids required as building blocks for muscle development), it ap pears that both groups likely will benefit from diets containing more protein than the current RDA of 0.8 g . kg(-1). day(-1). Strength athl etes probably need about 1.4-1.8 g . kg(-1). day(-1) and endurance ath letes about 1.2-1.4 g . kg(-1). day(-1).