Endurance training: How exhausting must it be?

Regular endurance training does us good, protects the cardiovascular system, makes us fitter. However, it is not for everyone the right thing to drive the body to its limits. Is it also more relaxed?What jogging, walking, swimming, cycling and cardio workouts have in common? They train our endurance. That pays off - not only because the sports unit provides a free head after a strenuous day or gives us momentum in the morning. "Regular endurance…