Signs of a weak Mars are mainly lack of energy and motivation and inability to do work. The individual may find it difficult to stand up for himself, be fearful or dominated by others. They may not know how to express anger or to see through the motivations of other people. They may be overly passive, easily controlled and may be abused, even physically.

Physically, the immune system will be weak, with low appetite, poor absorption, low body weight, weak muscles, weak liver and small intestine, or possible haemorrhoids. There may be an additional tendency towards bleeding of injuries, with slow healing or wounds or sores and possible anemia. For the male, there may be lack of sexual vitality.