Hello there Basalt. I might have some information you might find useful.
The protein requirement of athletes is higher than that of moderately active or sedentary people of course
. This increased need is likely to be due to increased amino acid oxidation and perhaps an increase in the rate of muscle protein synthesis to repair any muscle damage induced by prolonged exercise. The protein utilisation during exercise depends on the type, frequency, intensity and duration of exercise, the age, sex, level of training and the environmental conditions under which an exercise is performed.
Different athletes have different nutritional needs. Athletes engaged in endurance exercise require 1.2 to 1.4 g of protein per kg body weight daily as an auxiliary fuel source.
As intense muscular activity increases protein breakdown and protein use as an energy source, protein requirements are higher for body builders and other athletes engaged in strength exercise. The recommended intake increases to 1.6 to 2.0g of protein per kg body weight daily.
Here is a chart from what I gather it's fairly accurate.
Listing the type of training, then the optimal protein.
Type of training
g per kg body wt /day
Endurance athletes
1.2 – 1.4g
Endurance athletes with extreme energy expenditure
1.2 – 1.6g
Strength athletes
1.6 – 1.8g
Body Builders
1.6 – 2.0g
Hope this has been some help.
Jeremy.