Not for a beginner’s mind.
If you can sense and feel prana(prana, not muscles) during and after practice, know what too look for then you’re prob. not or no longer termed a beginner any more. It takes time but it comes like everything in yoga with PRACTICE. There is not getting away from that word. It will always haunt you if you don’t understand it’s improtance. Everything revolves around practice. Understanding yoga, how practice intersects life and so on.
Pranayam is appropriate for everyone ( within and as part of a full balanced practice & lifestyle)especially the basic stuff. Just start off with the basics,[B] pace[/B] yourself meaning don’t go too fast- that is potentially the biggest mistake you can make- jumpin ahead when the nadis are not sufficently purified enough to take the prane- the volatge of the currents, but don’t worry too muchh, be fearless and be sure to incorporate your pranayama within a full practice. So you reaaly want to get some meditation in there however elemental , so you’ve got some witness consciousness to observe in detahced way teh effects of prana. One way to commit yourself to practice is to aim to do it at least once every day and commit to that rain or shine.
If you want to make real prgress in yoga there is little point in half-measures i think.Effectiveness can indeed be dramatically reduced.
Being able to focus mentally etc for extended periods is something a beginner has had little training in and is not used to…If you can do this you should be able to do pranayama but just start off with basics.Consider this as an analogy.Imagine rock-climbing with ropes and equipment and not knowing how to use it, tie secure knots etc or having learned.Best get a bit of practice in there beforehand.That is like anything in life. You just avoid frying up the crcuits internally before you’ve even left the starting blocks. You will be fine if you observe common sense precautions ad observe thee self-pacing principle.
The asans just allow you to see comofrtably although they do have other benefits like they do themselves free up the energetic pathways, focus and calm down the mind and offer all-round purification generally.They effectively suuport the other limbs much the way a brick supports a bridge( i.e made out of other bricks;withou the other bricks well… you’ve just got a brick).
Many just do asanas and it often gets called yoga and it what people just do but they are less likely to make as much inraods and sttrides, effectively their practice is less effective without the rick & varied toolset available if you are inclined to use it- all those other tools- diet, philosophy etc.
I would say go for it but don’t strive for results , that is where th meditation comes in. Let the results come without force and so on. You need to empty your mind of nonsense before you begin -try some light gentle asan before hand and/or savasana.