Surprisingly the answer to your question is quite involved. I will answer it from a freedivers point of view. First of all, holding your breath has different effects depending on what circumstances you do it under. When you exercise normally your breath will increase as a response to the increased levels of CO2 in your blood.
February 14 is celebrated as St. Valentine's Day in various Christian denominations; it has, for example, the rank of 'commemoration' in the calendar of saints in the Anglican Communion. In addition, the feast day of Saint Valentine is also given in the calendar of saints of the Lutheran Church.
Take a look at the Valentineâs Day sections of major Department stores such as Isetan, Marui, or Mitsukoshi, and experience the Valentineâs Day in Japanese style. What is more unique in Japan is that there exists a âWhite Dayâ which takes place on March 14th, exactly one month after Valentineâs Day. On White Day men are supposed to give return gifts to women who gifted them chocolates on Valentineâs Day. More often the color of the chocolate is white because of the name of the day.