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Rock climbing can be done indoor and outdoors by climbing on rocks.
5: Basketball, Squash, Cricket, Volleyball ( Indoor ), and Tennis
It is usually thought of as an indoor occupation but may involve visits to clients in various locations.
Hal Finkelstein has written: 'Contamination control ventilation' -- subject(s): Air quality management, Indoor air pollution, Ventilation
you can play table tennis/ping pong it improves your volleys and controlling and making power.
The purpose of an air duct cleaner is to clean the heating and cooling system components of forced air cooling in one's house. It is done so that there is less indoor pollution and a lower level of contamination.
Indoor sports are just indoor sports. But if you want to get specific then you might say indoor soccer, indoor tennis, indoor football, etc.
An indoor riding arena is an indoor area where you can ride horses.
The word 'indoor' is generally used as an adjective, as in 'indoor activities', indoor swimming pool', etc.
Indoor soccer
In college you can play: Indoor Soccer Indoor Handball Indoor Swimming Indoor Floor Hockey Ice Hockey Basketball Football Baseball Golf Indoor Tennis Indoor Volleyball Dodgeball (Intramural) Dance Team Cross-Country
an indoor stadium