Following link is of some interest
for freedivers able to read a little bit of French...
http://www.freediverscafe.com/divecoach_exercices.php?topic=FDC_RATE
For those who don't, but are nevertheless able to decipher a little bit, I am ready to translate and to give some more explanations :wave ...
http://www.freediverscafe.com/divecoach_exercices.php?topic=FDC_RATE
For those who don't, but are nevertheless able to decipher a little bit, I am ready to translate and to give some more explanations :wave ...