I've got this thing where if I eat anything at all, within ten minutes I want to go to bed. It's overwhelming.
I've been like it since I was about 10 years old so I have learned to cope by only eating one big meal per day about half an hour before I go to bed.
Only since I retired have I needed to take a nap after lunch, but if I'm working on some kind of project I can keep going all day with no problems. I'm nearly 75.
I'm wondering if you need a multivitamin. I found out, through donating blood, that I tend to be low in iron. Medical checkups, three times a year, keeps me informed of the kind of shape I'm in.
On my morning commute, I feel energised and the only strain I feel is in my upper half as my lungs struggle to keep up with my legs.
On my way home, I get the opposite. My legs feel "sick" (like I've got the Flu). Every climb seems like hard work.
Do you breathe properly? When I first retired from construction and began having regular medical checkups, my doctor seemed concerned about my breathing, so he set me up with a diagnostic lab for tests. He also gave me some kind of inhaler, saying it would help me breathe, but I was never aware of having breathing problems. After much thinking about it, next time I went for my checkup, while waiting to see the doc I took several deep breaths and exhaled as much as I could. He puts a gadget on my finger which measures the oxygen level in my blood. Since I began to take deep breaths, I always register well with their gadget.
Think about your breathing as you ride; make sure you're getting enough oxygen. Breathing is an act of the subconscious, so it's not something we normally think about.