das Boxen
boxing
A combat sport in which two opponents fight each other using only their fists.
Er trainiert dreimal pro Woche Boxen im Sportverein.
He trains in boxing three times a week at the sports club.

boxing
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boxing
A combat sport in which two opponents fight each other using only their fists.
Er trainiert dreimal pro Woche Boxen im Sportverein.
He trains in boxing three times a week at the sports club.

'Das Boxen' (boxing/punching) is the nominalization of the verb 'boxen' (to box/punch). Such nouns formed from verbs are always neuter in German and take the article 'das'.
Das Laufen am Morgen tut mir gut.
Running in the morning is good for me.
When 'Boxen' (boxing) is meant as a sport or activity, it is often used without an article, similar to other sports. For example, you say 'Ich mache Boxen' (I do boxing) or 'Er mag Boxen' (He likes boxing).
Sie geht jeden Dienstag zum Boxen.
She goes boxing every Tuesday.
In connection with the sport, the verbs 'trainieren' (to train) or 'machen' (to do) are often used. The phrase 'zum Boxen gehen' (to go boxing) is also very common.
Er trainiert Boxen, um sich fit zu halten.
He trains in boxing to stay fit.