Citizen's well-being is often considered as nation's well-being.
I love this hook :) Very good :)
But general public health is declining these days,
Hey, this sounds a bit stereotype statement :D This may not be true with some countries, especially the developed one. So, be careful when you make generalizations!
Few claims that one among such solutions is to have more number of sports clubs.
.... How about the other side of the argument?
Others, however say that this would have little impact on public health and the other measures are required.
You need to introduce this side of the issue to the reader too... Make sure that you properly introduce the background of the issue in the introduction :)