Everyone has a different interest level in exercise and a different point at which they get bored with their routine. Some people can jog on the same route, at the same speed, by themselves for 20 years, while others need to vary their route or speed or find a jogging partner to remain interested. This is true with any exercise program. Elite athletes often train 2 or more hours per day and often have problems with both physical and mental fatigue. Cross-training is one solution.
Athletes mix in different types of exercise, keeping their muscles and minds fresh.
For instance, they might jog and weight train their legs and stomach on Monday, Wednesday, and Friday and swim and weight train their upper body on Tuesday, Thursday, Saturday, taking Sunday off. You might consider varying your exercise routine in a similar manner to help with your fatigue. If you are tired and worn out throughout the day, and not just when you exercise, then a medical problem may be responsible for your tiredness and a visit to the doctor would be important. Always consult your own doctor about any opinions or recommendations with respect to your symptoms or medical condition. Beth Israel Deaconess Medical Center .