ah ok non avevo capito se parlavi di CHO o PRO.
1.5/1.7 è il dosaggio consigliato e ormai considerato standard negli sport di endurance.
non è certo il limite massimo che l'organismo può assimilare, che se esistesse non sarebbe certo indicato così preciso da orologiai svizzeri, proprio 1.5, al limite ci sarebbe un range, da x a y
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2) Protein intakes of 1.4 – 2.0 g/kg/day for physically active individuals is not only safe, but may improve the training adaptations to exercise training.
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Safety of protein intakes higher than RDA
It is often erroneously reported by popular media that a chronically high protein intake is unhealthy and may result in unnecessary metabolic strain on the kidneys leading to impaired renal function. Another concern that is often cited is that high protein diets increase the excretion of calcium thereby increasing the risk for osteoporosis. Both of these concerns are unfounded as there is no substantive evidence that protein intakes in the ranges suggested above will have adverse effects in healthy, exercising individuals.
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It is the position of the International Society of Sports Nutrition that exercising individuals need approximately 1.4 to 2.0 grams of protein per kilogram of bodyweight per day. The amount is dependent upon the mode and intensity of the exercise, the quality of the protein ingested, and the status of the energy and carbohydrate intake of the individual. Concerns that protein intake within this range is unhealthy are unfounded in healthy, exercising individuals.
FONTE:
International Society of Sports Nutrition position stand: protein
and exercise