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.
Hereâs what we know about what it means when you make someone your Valentine. Historical records point to not one but several Christian martyrs named Valentine. The earliest reference is to a saint buried on February 14 outside of Via Flaminia, in Italy. Nothing is known about this saint besides his name. Ancient Rome was a difficult place to be a Christian.