Immediately. You’re still naked.

Those darn aliens might have fixed your body, but they haven’t fixed your clothes. You are currently lying nude on the rooftop of your public pool, on the hot summer weekend afternoon.

What are you going to do now? Go down, then be arrested for public nudity? You don’t think that the police officers will be willing to accept your excuse of “It was those darn aliens!”

At least opening the locked door of the roof is easy enough. Your new musculature easily snapped the lock without making too much noise.

You peek into a mirror, and see that, despite the changes made to your body, you are still completely recognisable. Somehow you just look like a bigger, buffer, healthier, version of yourself. Which is good and bad. On the plus side, everyone is going to know it’s still you. On the negative side, you are nude in public and everyone is going to know it’s still you.