Son started HS workouts yesterday subject to some pretty exacting protocols (set by the school). Masks worn at all times; equipment segregated so no one picks up another's bat, helmet, etc; players placed into cohorts with their academic year to mimic our school's approach to in-person learning, etc. He worked for 3.5 hours, safely.
Daughter (HS soph) has been working out with her club vb team for weeks now. They practice in an indoor facility with sides that opens from floor to ceiling (like a huge, converted body shop), wear masks at all times, take sanitizer breaks, have temp checks, and use color-coded balls that only stay on their court. Her practices are 3 hours/3 times a week.
They both work out at a gym with outdoor space for weights and conditioning/flexibility work 3x a week, masked up and distanced.
All of this is happening in SoCal despite the restrictions that were just imposed. None of this works if the elements don't allow it.