I have a Trampoline ???? ?

I have a trampoline that I’ve been exercising in indoor. The 4 legs on the trampoline it made some dents on the floor. What can I use  So that the floor doesn’t break and dent the floor ? 

I searched online and can’t find a solution I don’t know what to do ??? 

Update:

I forgot to add that the dent is pretty deep. 

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