Yes, they can keep you on the bench.
<u>The moment when I felt confident about a decision made by me:</u>
It was during my 12th standard, I was about to decide if I have pursued Engineering or Medicine. Many of my relatives suggested me to go for Medicine, as they thought it is the only profession where you could make more money and be successful.
My passion is to become an engineer. I was too confident and thus opted for Engineering, though my parents were unhappy with the decision. But as soon as they saw my progress in studies, as well as my project, works they understood me very well and supported a lot. At last, after my graduation, I was happy that I had gone through all the negatives and got a good job.
I believe the answer is: Eat a well-balanced diet to increase energy and immunity
Even though physical activities improve both our energy and immunity in the long run, they are not as significant as maintaining well balanced diet in your life.
You need to make sure that you get your nutrients from various source of non-processed food in order to fulfill both your macronutrients and micronutrients.