Bulky body from doing the pole??

Hiya iv got a bit of a problem with my arms in particular. Iv noticed that iv developed rather heafty,bulky upper arms. Iv been poling for years but iv started to do more this past year and thats when i noticed it. At first my arms got nice and toned with a hint of muscle..now they look big and fat. They are still musclular and toned but in photos and from a distance i just look like i have massive fat upper arms!!! Im beginning to hate photos of me or trying to cover em up or put my hands on my hips alot to make em look more slimmer. Im fine everywere else im not overweight and im a UK size 10 (us size 6) which is good for me. But how the hell do i get them looking more slender without losing tone or stop doing pole? How the hell do brill professional competitive polers look slender but toned at the same time?? Someone told me iv layed down the muscle over existing fat in my arms which is why im looking bulky. Is this true? 😮