Endurance athletes' one of the biggest nightmares is loosing muscle mass during and after hard training sessions, races. It doesn't make the situation easier and less complicated, if you are vegan!
If you say vegan, lots of people think on a skin and bone, unhealthy looking person. It is not true! Yes, most of vegan are very skinny and they do not carry around unnecessary muscle mass and excess fat! I am 62kg (183 cm) and my body fat is around 5%. I have enough muscle to be strong, very strong on the bike! My FTP is well over 5 watts/kg, it means I am a strong cyclist according to the papers....