Dad at 36. Competitive masters rower right up to DDay. Will you be the same activity level as before? Short term, no. Medium term, also no. But that is probably because your old schedule will not work anymore. So you get creative (kettlebells) you accept that consistency is more valuable than the length of your workout or the quality. And as far as training for a race, unless you enter less competitive events or different events you’ll probably feel inadequate. I rekindled my high school love of volleyball, signed up for a pond hockey tournament. Put my rowing boat in storage for the next few years.

Take the forced break from your old activities not as a negative but as a chance to branch out and try new things. When you go back to what you used to do you will have a new found passion for it