With an aneurysm measuring at 4.9, you need to see a cardiologist at a major academic center that specializes in aortic aneurysms. Following up in a year with another echocardiogram sounds pretty "dicey" to me. I think that you are on dangerous ground if you follow this advice - just my opinion from our experience over the last three years and lots of reading of the medical literature. You definitely seem to be pushing the envelope particularly with your resistance training and the high plaque burden.
My husband is 80; his 4.8 thoracic aneurysm was diagnosed in 2021. He has been followed yearly (now) at Mayo with a CT angiogram with contrast. The echo is not as accurate as other modalities. My husband's aneurysm has been stable but the first year we came back every three months just to make sure it was stable.
Some surgeons would consider doing surgery with an aneurysm at 4.9 -- if other factors made it appropriate.
Best wishes and good luck. You need a second opinion from an expert in thoracic aneurysms.