Golf swing fundamentals are to be found in the three segments of a proper golf swing which are the backswing, the downswing and thirdly the impact and follow through.
The backswing is one of the important golf swing fundamentals because every shot begins here. If the backswing falls short, so will the resulting hit. At this stage, focus should be placed equally on body rotation and club and arm extension.
Moving to the downswing as another golf swing fundamental, this movement actually starts in the legs and the hips, rather than the arm. There should be a clear transfer of body weight from back to front with the knees, thighs and hips all beginning to move forward. This should be the correct movement in every proper golf swing.
The impact and follow through are the golf swing fundamentals that complete the entire swing. At impact the body weight should be on the outside of the forward heel and the inside of the rear foot.
The entire awkward movement of the golf swing is unnatural to the body and this is why the body resists and it becomes very difficult to develop all the smooth movements that go into the proper golf swing fundamentals.
Even endless practice may not be as effective in developing your body muscles in such a way that the golf swing fundamentals come as natural as possible. This is where exercise comes in to play a key role. Many golfers have successfully used golf-specific exercises and conditioning to improve their golf swing fundamentals.