[wes]

Cdavis,

The most I have done is 60 minute continuous so 40 sets of 2x25m. I could have kept going, I just set 60 minutes as arbitrary goal to see if I could do it. I usually do only 30 to 40min like this then switch to 1x25m sprints for maybe 10 minutes which I think are better for building muscles. I find it very very revealing to do repetitions like this and try tweaks to my technique. I have found for example that if I start "cold" with no warmups then the first lap is very easy, the second is tougher, the third is hardest (urge to breathe) then they get easier after that. Usually after 10 sets they have settled down to a stable experience. Then if I want to test some new technique I will switch to that new technique for 5 or 10 sets and see if the difficulty has changed. I judge the difficulty on how early the contractions come and how difficult is the breathe up/recovery in between. I typically will do only 30-40 minutes at a pool session, usually ending with sprints 1x25m as I think the sprints build muscle better than the slower 2x25 sets. I do this both with monofin and nofins, though with nofins I will do 2x25m on 2:00 intervals as I cannot do 2x25 nofins continuous at 90 sec yet, now I can do only 6 sets or so then start to "lose ground". I think this way of training is very very good for technique and not so good for max attempts. I now try and mix in some training days where I do only 4 max attempts and nothing else, copying sebastion murat in what he posts. Cheers Wes