weighed in at a whopping 410 pounds

[SuprunP]

Because I like to eat, as evidenced by the fact that I once weighed in at a whopping 410 pounds.
(The Complete Guide to Fasting; Jimmy Moore, Jason Fung)

Is this just a 'fancy' way of saying that his weight was 410 pounds at one point in his life? It seems 'fancy' to me since I have some misgivings about his being weighed before some sort of contest (maybe before an airplane flight?).

Thanks.

 

[Keith Bradford]

You're right. "To weigh in" is a compulsory procedure before boxing matches and horse races. However "to weigh in at [measure]" is a metaphorical use found in non-sporting contexts, and simply means "weigh".

 

[SuprunP]

Thank you Keith Bradford!