The persons who train martial arts disagree with relation to the matter of the competitions. Some arts, like the boxing or the Thai boxing, give attending to the sparring -fights during training - and to taking part in competitions, yet the most common of aikido and krav maga reject the competitions. The reasons that cause these opinions are different. Many of the arts desiring to compete argue that the competitions give place to better and more efficient techniques. However, certain styles not desiring to compete claim that the rules with which people developed these competitions ruin the art and does not represent what can happen in a real situation.