It may be difficult to build a tower at once. Though to build one over two years is a realistic objective.
Building increased fitness each and every day by a modest amount of exercise is a simple process.
You don’t have the time to go to the gym/workout/exercise/whatever-else? I have found that, if I replace the time spent thinking about this with action, I can actually do a modest amount of exercise . The effect of the exercise rapidly accumulates over a number of days.
Why make the investment in exercise? The return on the investment is quicker recovery time if injured, and better ability to deal with the stresses of life.
The stomach muscles are responsible for many body movements and by doing at least ten sit-ups per day I enable the tower to grow daily.
After getting up in the morning I’ve only nine more left to do.