Are there any Reformed theologians who support the practice of mindfulness (inner body awareness)? As Eastern and Western religions begin to exchange lifestyles and practices, more and more Christians are participating in mindful meditation practices such as Zazen. When I refer to "mindfulness", I mean inner body awareness. This means you are both aware of your mental and physical state, therefor you are living and rooted in the present moment. Christian psych clinics are beginning to wonder if mindful meditation should be incorporated into their practices. My question is, can mindful meditation and living be consistent with biblical teachings? Are there any reformed theologians who support this view, and how do they defend it?
Zazen, based on the definition in Wikipedia, is not a biblical practice. With biblical meditation, we ponder God's word and works to get full and true insights into this life. We might look within in order to see what our desires are, but then we interpret those desires and feelings according to the word of God. Proverbs 3:5 tells us not to lean to our own understanding; Romans 7:18 tells us that there isn't anything good in the flesh, yet Zazen and different forms of Eastern meditation (of which I am a former practitioner) tell us to look within ourselves for answers. 

Examples of biblical meditation:

Joshua 1:8


  This book of the law shall not depart out of thy mouth; but thou shalt
  meditate therein day and night, that thou mayest observe to do
  according to all that is written therein: for then thou shalt make thy
  way prosperous, and then thou shalt have good success.


Psalms 1:2


  But his delight is in the law of the LORD; and in his law doth he
  meditate day and night.


Psalms 143:5


  I remember the days of old; I meditate on all thy works; I muse on the
  work of thy hands.


1 Timothy 4:15


  Meditate upon these things; give thyself wholly to them; that thy
  profiting may appear to all.


Regarding living in the present moment, the accepted practice is to "remain in Him," to "pray always," to "walk circumspectly." In other words, live as though Christ was with you at all times. So the mindfulness of yourself is to keep your bodily desires under control and "keep yourselves in the love of God." Tow books promoting this view would be Present Perfect by Gregory A Boyd and The Practice of the Presence of God by Brother Lawrence.