57879
I believe these are both grammatical, is there a slight nuance difference for
not having を?:

私は毎日三十分ぐらい運動をすることにしています。

And

私は毎日三十分ぐらい運動することにしています。
CC BY-SA 3.0
2018-04-12T02:23:22.087
57877
2018-04-12T03:36:16.933
29512
question
nuances
~する and ~をする question
As you said, both are grammatically correct. One difference I can think of is
that adding 「を」 makes it more formal.

Keep in mind that there are some situations in which 「する」 can't be used but
「をする」can, i.e 祭りの準備する(X)祭りの準備をする(O). It really depends on what precedes it.

Placement of 「を」 can also be used to emphasize, but that's irrelevant to this
question so I won't get in to it.
CC BY-SA 3.0
2018-04-12T03:36:16.933
57879
2018-04-12T03:36:16.933
18608
57877
answer