[ 2 1 s t c e n t u r y s k i l l s l i b r a r y ]
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other hand, if they start it too close, they run the risk of
hitting their heads or feet on the hard wall or not being
able to plant their feet the way they wanted.
The answer awaited on the floor of the pool. If you’ve
ever gone swimming in a lap pool, you may have
noticed the black lines painted on the bottom. Those
lines are there to make sure swimmers don’t stray out
of the lanes and bump into other swimmers.
If you look closer, however, you will notice that at the
end of each of those lines is a short horizontal line. This
Lines on the bottom of the pool can help a
swimmer judge the distance to the wall.
