Extremely similar to various meditation methods & breathing exercises, w/ every one just as valid. If you're trying to keep things completely non-spiritual in any way shape or form, and aren't keen on the more metaphysical concepts of chakras etc something stripped down and basic like this I'm sure would still be highly beneficial.
If you're looking to add some music that's equally non-spiritual, have a look at anything from the Baroque Classical Period as it's said to be composed in a tempo closely matched to our heart rate, that's calming and focusing for our brains, making it good for relaxing as well as preparing to study.
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No
for supporting trump. Because doing so is deplorable.