birdyman wrote:Thanks all - I am not yet at the stage where I need them so will just concentrate on actually getting fit + confident enough to tackle 3.8km, just in the case the need arises, cough cough.
Please don't just keep hammering away at poor technique until you can do it for 3.8km, though. 200m sets maximum, please, and ideally 100m sets of mixed strokes and drills. Throw some 200m sets into your sessions every 2 weeks-ish at first, then build them into more of your session. Stick in a continuous 1500m effort once a month-ish to give you confidence.
As my coach says... swimming one length perfectly is better than swimming loads badly. Also, if you can keep good form all through your swim you will exceed your expectations.
Also, swim 'off' a time. So for 100m sets maybe swim off 2 minutes: every 2 minutes you start a 100m swim. Swim fast, get more rest. Swim slow, less rest. Pick a time that would give you about 20s rest for a hard 100m swim (not a sprint, not dawdling).