sprung floor
n.— «One of the cooler aspects of this new auxiliary gym is it has what’s called a “sprung floor,” which helps takes the stress off of people’s legs while they’re here playing basketball or volleyball.» —“Inside the Phoenix’s New Fitness Center” by Adam Aaro WBAy-TV (Green Bay, Wisconsin) Sept. 19, 2007. (source: Double-Tongued Dictionary)
Further reading
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A young listener once asked if there was a single word for “a combination of being nervous but also excited” about something. Listeners offered several of their own coinages, including nervouscited. Another helpful term along these lines...