What are the two main factors affecting an athlete's ability to recover from training?

sleep, mental fatigue/stress levels, nutrition, hydration, frequency and type of training loads, alcohol intake and methods of warm up pre exercise and cool down post exercise.

Explanation:

answer; polycythemia is the correct answer;

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.