Does anyone know the effects of giving blood or plasma on the body's ability to recuperate/build muscle/avoid fatigue and sickness? I have yet to find any info on this aside from possible weakness (4?) weeks after donating blood, but I'm curious how this physically effects muscle tissue, hormones, ect. I can't imagine the body can perform the tasks demanded by a body builder as well with less blood and /or plasma.
Any info would be greatly appreciated.