What is spiritual changes during puberty?
Spirituality is by its very nature non-physical. Puberty is a physical change, and is therefore unrelated to spirituality.
However, the physical desires created by puberity can make it more difficult to be spiritual, since a goal of spirituality is to be free from desire. It is also more difficult to have a spiritual experience while your physical senses are stimulated.
Some spiritual traditions cite that the kundalini can only be awakened after puberty.
According to PaganPages:
"Before puberty, kundalini is primarily outside the body. As puberty commences, a two-valved energy "gate" (imaginary opening) in the "root chakra" opens, and kundalini circulates up from the earth and into the root chakra. "