Resistance Training can be accessed through different modalities
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The (non)Futility of Resistance
Resistance training is the affecting of a static weighted object with (a) muscular force to elicit a positional change in that object and a corresponding positive muscular response.
Air
The air element. It is the lightest of the four tangible elements. According the the KJV Bible, John 3:8 - The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth.
Fire
The fire element is symbolic of energy, transformation and directness. Fire is a destructive force. Yet, it can be controlled, directed and channeled.
Water
The water element is symbolic of fluidity of movement, depth of emotion, existence within cycles.
Earth
The earth element is symbolic of stability, consistency and constancy.
Discussion of the elements . . .
The elements are important for the existence of 3D reality.
Pursuance – To be healthy . . .
One can elect to be the personal envoy of their own health.
The Journey – Internal Purification
Yoga and alchemy are practices of transformation. Through them, one endeavors to dissolve the ego self and to go beyond the mundane centered nature imbued therein.
Simple Bending Back
There is a train of thought in some yoga circles that using props in this pose must adhere to certain strict guidelines. Placing a block between the knees provides a different kinesthetic stimulation to the body.
Ab-Sutra Wellness and Fitness 