Dal proteins

I used to be in gym and do workouts in my earlier phase of life.

I have an experimental mindset inside me and observed closely the effect of proteins. 

If you are not into increasing bulk of muscles or unlikely to injure your muscles then dal(pulses) are good enough.  They are helpful in muscles maintenance.  But not in injuries or increasing size. Soybeans are much better here. 

Most vegetarians in India consume milk and milk of course is great in muscle building.  But they have fat.

Food choice of course is a matter of so many factors.  My point here is to highlight significance of dal. And they are fine for average workers.