Muscle Mass 24

Every day I mark, with a thick black marker, my work.  An "X" indicates a rest-day, so March had only two, a month I swam 125.6 kilometres.

Since January I have gained six-kilograms and, when I mentioned it to Coach he asked if my trousers still fit - they do - so it is mostly upper-body muscle.  To put it another way, 1kg equals 900ml of muscle mass (1,100ml of fat) so I have added 5.4 litres of muscle volume in six months.  The question, then, really, are my shirts, which still fit.