Questions & Answers about Na het sporten wil ik even tegen de muur leunen.
Because het sporten is a nominalized infinitive: the verb sporten is being used as a noun-like expression meaning exercising / working out.
So:
- sporten = to exercise / to play sports
- het sporten = the activity of exercising
After na in this sentence, Dutch uses that noun-like form:
- na het sporten = after exercising
This is very common in Dutch:
- na het eten = after eating
- voor het slapen = before sleeping
- bij het koken = while cooking / when cooking
For this structure, het is normally required.
This is because Dutch is a verb-second (V2) language in main clauses.
The sentence starts with Na het sporten, which takes the first position. Once something else is placed first, the finite verb must come second:
- Na het sporten = first position
- wil = second position
- ik = then the subject
So:
- Ik wil even tegen de muur leunen.
- Na het sporten wil ik even tegen de muur leunen.
Both are correct. The second one simply puts emphasis on after exercising by moving it to the front.