This contemporary, mass-market and modern name could be ideal for a wellness or health brand.
The name "DayGym" has only six characters and just two syllables. Two-syllable names are highly rare and highly prestigious. Leading companies using two syllable names include Kleenex, Starbucks and YouTube.
Daygym.com is a dot-com domain. Dot com domains are the most prestigious domain extension in the world, famously used by websites like youtube.com. Owning a dot-com says that you own the word "DayGym" online.