Seriously, part of the reason you're probably not tired is because you simply have not done enough physical exertion.
Seriously, part of the reason you're probably not tired is because you simply have not done enough physical exertion.
But then again, I'm fairly active at work (have to go up and down stairs between my office and the lab dozens of times a day, standing lab work, walking out to the warehouse to get parts, etc. which actually adds up to quite a lot, even if it's not very strenuous) so maybe if I just sat at a desk all day it would be a lot worse.
having kids basically just makes life impossible and painful.
Buying a kettle bell or stationary bike and doing HIIT can wear you out in <20 minutes.
On weekends I ski moguls for 6+ hours in the winter and hike 12ish miles in the summer.
The only time I feel a lack of energy is when I _stop_ regularly working out. You can be very efficient and get the same effect doing 20 minutes of HIIT. When the weather is marginal or I just don't have time that is what I do.