I did this a while ago and basically they were both poets except bradstreet was more rich and wealthy and wheatly wasn't, wheatly was also black and had a lot of struggles with that and had more struggles than bradstreet but although they were both raised very differently they both became great writers although bradstreet was more religious and her works weren't meant to be published
Answer:
Yes it is a Gerund Sentence.
Explanation:
It's made up of the gerund running and the direct object marathons.