Leaders prevent excessive pressure on both themselves and them members of their team. Set realistic goals for yourself and your team. You should be able to see the end in mind the means of achieving it.
If an unrealistic task is given, realize it and break it down to a realistic, seeable, achievable goal. Expectations set the motivation of the group. Excessive pressure on members serves no purpose and often kills initiative and creativity at all levels.
We are more often frightened than hurt; our troubles spring more often from fancy than reality.