Michael,
About the relaxation, I didn't give him any really specific instructions, but just described what I feel and do during a static. You sort of have to go for it on a "feeling level".
When I close my eyes I settle down inside, finding a quiet calmness, enjoyable, sometimes blissful. But the essence of it is that it's quiet and one has a feeling of sinking inside, of peace.
Try to locate that "zone" or place or feeling inside and just let it lead you deeper into more quietness. Don't try to push away thoughts that come as that will raise your level of mental activity and consequently your metabolism will also rise, burning more O2. So if thoughts, distractions or contractions (that ugly word
) come up and have a tendency to take you away from that state, don't fight them but just gently get back to that feeling. Softly drift back. Don't worry about how many times you have to get back, contractions may throw you way off. Just always gently drift back. In time the quietness will predominate and the contractions will be somewhere in the distance.
At first contractions will probably overshadow the quietness but with practice one should be able to experience the contractions while not losing that quietness, as if the two states could coexist simultaneously.
The point is that the quietness or peace or being in the "zone" is a more direct experience of our own inner awareness, and that is not limited by anything, being unbounded in nature. In theory contractions should not eclipse this experience but in actuality being a subtle and delicate perception it gets knocked around a bit because the nervous system has to be trained to experience it more directly and permanently - at least for the majority of us.
And this is one more interesting benefit of freediving: By diving into the depths, whether static or dynamics or constant, we also end up diving into our inner nature as the result of a search for more quietness and therefore less consumption of O2. If focused in this way, freediving is a very powerful spiritual technology, where "spirituality" is defined as the experience of our deeper levels of awareness or perception.
regards,
Adrian