It is true that it is difficult to decide where to draw the line between legitimate and illegitimate performance enhancement. However we should continue to draw a line nonetheless. This line should be drawn at protecting athletes from harmful drugs and preserving the spirit of fair play and unaided competition between human beings in their peak of natural fitness.  The special diet and sport training equipment, which may seem very hard and exeptional, have been designed based on serious scientific research proved and tested to fit with long-term training of athletes. Hard practice to achieve the best performance with help of these professional methods is completely a different from taking steroids and growth hormones for immediate result.