Is the Marathon advisable ?

We can show a source from the Talmud to advise against running in a marathon. Kesubos 111a , 3 lines up.

Be careful in 3 matters -

Don't sit too much
Don't stand too much &
Don't walk too much

Each of these may lead to certain ailments. Rather , divide your time between the 3.
Now may be a good time for a gem of Torah study.
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