Running tops for the big boobed.

[GTTSR]

32G/H here. I usually wear floaty running tops with a solid sports bra underneath. Well, I was running by a mirrored wall today and clocked myself running and was entirely horrified at what I saw…boobs looked enormous and the floaty fabric made me look huge. I’ve a bit of a belly so fear a tight top would look equally horrifying. Is there a style I can wear that I look athletic and not matronly?

Nobody really looks at other runners. The only time I've had someone really look at me when running was when I wore a t-shirt with a big supposedly funny logo across the chest or when kids have shouted abuse at me (probably because they didn't realise I was old enough to be their mother).

I wear a black or navy running top from a running brand. Decathlon is fine. I'm not overly busty but definitely have boobs.
The high impact bra is all important - bouncing boobs are not good.

(If you are single, you are allowed to silently admire men's running form. Just don't get caught )

Women's Running T-Shirt Black - Run 100 | Decathlon
I prefer the sleeves to not end above or on the boob line. Those sleeves are wrong for me because they sort of point to my boobs.

Adidas clothes usually fit nicely but run small. I wear Nike (from somewhere like Start Fitness) or Ronhill. I rate Ronhill.
The brands like the SB and LL ones are expensive for something you're just going to sweat into IMO. A black top is just a black top after all.
I've not actually tried tops fom Decathlon personally.
I didn't really like the bargain supermarket running clothes I tried. They were ok but just ok.