i used to do tris, now just tts. i'm pretty good on my day. but since i've quit swim/run, i've developed back issues, esp since i work at a computer all day. frequently i have problems racing now due to back pain when pushing hard.
i ride 15-20 hours a week in season.
so i'm putting 3x45' swims (lots of fly and non-free) and 3x20' runs back in my schedule. my thinking is that it will improve my baseline physical fitness and durability. in the off-season i might do more swim.
is there any reason why this might be a bad idea?