Chill out: Lake St Clair, Tasmania. It takes a certain strength of character to go swimming in Tasmania's chilly waters, nowhere more so than Lake St Clair, Australia's deepest lake. Carved out by glaciers millions of years ago, the lake sinks down to a depth of 200 metres.
Fitness (CTL) Fitness (CTL) is an exponentially weighted average of your last 42 days of training stress scores (TSS) and reflects the training you have done over the last 3 months. However, the workouts you did 15 days ago will impact your Fitness more than the workouts you did 6 weeks ago.
BTLS,PHTLS. All cover mechanisms and risk factors and injury assessment and treatment with the main differences being, who is being trained to do what. Also, if memory serves, BTLS tests a single team leader who directs a group of capable team-mates who do nothing without direction, PHTLS on the other hand tests as a team and all members are active.