Being sick can really mess with your training plan. Yesterday an upset stomach
kept me in bed or in front of the TV for most of the day. Yesterday was my run
day, which I really can't skip. When you're only running once a week, skipping
that one run means skipping 100% of work-outs. Lucky for me, I was only sick
for one day, and I managed to make up yesterday's run this afternoon. I had
some stitches at the very beginning, but they went away. Overall I felt tired,
but didn't have any real muscle/joint pain. Better yet, I was no slower than
usual.

My wife was kind of sick for about a month during her half-marathon training.
That meant not too sick to stay home from work, but too sick to do any
running. She didn't have much of a base before starting that program, so she
ended up doing the 5k fun run instead of the half marathon. For a while she
considered walking the 13 miles, but eventually decided that's not what she
really wanted to do.

If you've set yourself a goal that isn't challenging, being sick for a week or
two won't matter much. But if you're pushing yourself, missing out on that
much training might make the difference between succeeding and failing. Since
we're all pushing ourselves to greater heights, staying healthy is just as
important as keeping up with our training. To make things worth, training for
and participating in endurance events weakens your immune system. So be sure
to eat right and get enough sleep. There's more to doing triathlons than
being fit.