Takk til definition for linken til denne svært interessante avhandlingen.
Fant et interessant kapittel der som basert på gjennomgang av en rekke tidligere forsøk konkluderte med en del anbefalte verdier for daglig proteininntak. Til slutt følger en diskusjon rundt temaet hvorfor så mange kroppsbyggere og styrkeløftere ofte inntar mer protein enn disse anbefalte nivåene.
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5 Recommended protein intakes for physically active individuals
Taken together the weight of the existing evidence strongly indicates that daily protein needs are increased as a result of either regular strength-speed or endurance training. Table 6 presents a summary of the recommended daily protein intakes for physically active individuals.
Table 6. Recommended Protein Intakes (g kg body mass-1 day-1) for
Physically Active Individuals
Strength-trained, maintenance 1.2-1.4
Strength-trained, gain muscle mass 1.6-1.8
Endurance-trained 1.2.-1.4
Weight-restricted 1.4-1.8
Data from Williams 1999. The values presented represent a synthesis of those recommended by leading researchers involved in protein metabolism and exercise. Teenagers should add 10% to the calculated values.
However, the testimonials of athletes who believe that their success
depends on consumption of large amounts of protein and energy, and the
examples of Japanese sumo wrestlers and Olympic weight lifters, suggest
that further laboratory investigations are necessary before the question of protein need in those attempting to increase lean mass is settled.
Several possibilities might explain this apparent contradiction. Obviously,
the athletes could be incorrect, i.e., they may have been influenced by a
powerful placebo effect. Alternatively, some other constituent(s) in highprotein foods might, in combination with surplus supply of amino acids, be responsible for a muscle-building effect. Several candidates are possible including creatine, a nitrogen compound found in meat and fish that has been studied recently (see 11.3. Effects of nutritional supplements designed to promote lean tissue accretion).
Finally, although associated with a variety of adverse health effects, some
compounds (i.e. anabolic steroids) are know to be anabolic and it is possible that the high-protein intakes consumed by some strength athletes are only advantageous when combined with these agents (Lemon 2001).
