Stop whatever you are doing right now. Sitting, or standing, or even lying down, tune into your breathing in this moment. Sense how the breath is moving through your body. Notice the rise and the fall of your shoulders, chest, belly. Feel the flow of air through the nostrils and the throat, in and out.
As you do this, you may notice areas of tension, in your muscles and in your mind. Allow the holding to dissolve as you stay with your breathing. Stay with the rhythm, the way you watch the ocean waves at the beach. Notice how they are not the same -- some are shorter, some longer. Sometimes the pause between breaths feels big, other times there's not much of a pause at all.
Tune into your ribs now. Feel them expanding up and out on the in-breath and releasing back in and down on the out-breath. Can you sense your ribs as a 3-dimensional structure? We call it the rib cage, but that's much too confining. (In German, the word "brustkorb" translates as "rib basket," which is much sweeter.) Breathing in, take in what you need, sense the full expansion, all around. Breathing out, experience the movement back in, subtly letting go of everything that is unnecessary.
Our breath is our most intimate connection with the environment around us. Don't hold back, restrict, or constrict your breathing. Allow your ribs to move freely and with lightness and ease. How does this change your experience of the moment?