To all of you who are under 40, I’m telling you, get in shape before 40 because after that you can maintain, but walking the line between building strength/stamina and injuring yourself is extremely perilous

— Emily Lakdawalla (@elakdawalla) June 14, 2022

I have had no problems, and I work out very hard. I’ve done more than maintain, too. I’ve made myself far more muscular and am several times stronger than I was four years ago.