To make a point, please allow me to share with you a few details about what I remember learning about tree growth, muscle growth, bone strength and bone repair after a break.
You have probably seen small trees planted at new landscaping projects with guy wires holding them upright. Trees that cannot sway in the wind grow up weak. The wind causes microfractures to occur in tree cellular structure. The resulting healing fills in the damaged areas making trees stronger.
The same goes for muscles and bones. Muscles that bear weight get tiny little tears in the muscle fibers. The body fills in these damaged areas resulting in building muscle mass. So, those bodybuilders with the big muscles have gone through a lot of tearing and filling in. Bone density increases when microfractures occur as bones are subjected to stressors, such as weightlifting. The little microfractures fill in with strong bone.
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