Ok. Here is the start of a series of studies of the main 7 chakras.
The Base chakra, the 'Muladahara', is located on the Perinium, it's 'petals' face outwards. As you would guess, this chakra corrseponds to the earth, - it's otherwise known as the Root chakra. It is a very physical chakra, and is thus employed in grounding exercises. The psychological lesson of this chakra is self acceptance, in order that we may be truly rooted, - acceptance of the physical nature of our beings. It corresponds to our insticts and survival, as well as very much our 'child within'. This means that play is an excellent therapy for the base chakra.
As this chakra is about matter and the physical world, we need to learn to embrace this. Spiritual teachings can make us shy of the physical world, causing problems with this chakra. To me, the most obvious exercise for the base chakra is sex. I also enjoy exercising this chakra when walking, imagining it as a lovely red ball that I move around as I walk.
This is very much the chakra for those who enjoy the elements. Play with water, with sand, build a fire, eat heartily. Enjoy your physical life! These will help you more than any single meditation. The living is the meditation. For a more relaxed exercise, sit cross legged. Feel the chakra connecting to the ground, reaching deep within the earth. Here are your roots. You are a physical being !
You make like to research correspondences with the chakras and the endocrine system.