Thank You very much for your kind replies.
Yes, I am aware that I have to practice more exercise. I have started to go to the swimming pool. Only 10 minutes the 1st day but I hope to progress gradually.
Normally I do not fall sleep when practicing lying meditation. And when I practice walking meditation I accumulate so much energy that I am not able to sleep when I go to bed. So I am recently trying to avoid any kind of meditation before going to sleep, only in the morning. As you say, Matheesha, I fall sleep of boredom, but something rings the bell at exactly 2:00 every morning
Now it’s Monday, 13:00, And I’m fresh as a rose!
I just start to feel some dullness late in the evening, and completely wasted (and eventually with migraines) from Friday to Sunday.
Santa100, your point is right: there is no need for a clarifying Sutta; the own story of the Buddha shows us the Middle Way, far from self-mortification.
As I don't know if I am going to die tomorrow, in 10 years, or in 40 years (now I am 45), I need to maintain a compromise with my job in order to survive, therefore I must take good care of my health. If I were a monk that could be a different story, because then I should keep a compromise only with Vinaya regulations. Less sleep = more meditation