Define "heavy"
Aside from accidents and injury which are hit or miss. Sleep Apnoea, caused by the thicker neck. If you don't know you have it, or no-ones ever told you that you stop breathing multiple times a night, it could be potentially nasty as not breathing tends to affect a lot of other aspects. I dare say it's far more common amongst board members then the general public.
During the NLP, as the size of the latissimus dorsi increases, so does the frequency of painful collisions of elbows with doorframes.
As a fellow 62 year old female lifter with multiple sclerosis there is no down side for me. However, for my husband who is 68 and a self-professed lazy man, this is not true. He is stronger today than he was in his twenties. We are gloriously retired. But, while he is stronger, I now expect him to work harder. Honey, move those 80 lb retainer wall blocks because , you hunk of a man, I know you can. Honey, please unload the twenty 50 lb bags of soil I loaded into the car at the store because I know you can. Come with me Honey and load my zillion buckets of wood mulch into the car I have thoughtfully shoveled for you (and bring them where I want them when we get home). Honey, please pick my old afflicted heavy butt off the ground because I've fallen again and I can't get up. I crack the whip and there is nowhere to hide. That's a downside...and maybe also that he's been saddled with me for 42 years.