Mental fitness is a state of mind which helps a person perform to the best of his or her ability.
The right attitude is a state of mind which helps a person perform to the best of his or her ability.
We all know the classic prescription for success in endurance running - a solid aerobic base through mileage, plus speed training, hill work, flexibilty, strength conditioning and a nutritionally sound diet.
It is common for runners to enjoy good form when they have had a prolonged period free from injury or illness.