The most common and most likely answer to this crossword clue is the 10 letter word TREADMILLS
I've seen this crossword clue in Financial Times
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More clues leading to the result TREADMILLS
Buddy explains!
The straight part
We know that "gym equipment" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gym equipment = treadmills.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does TREADMILLS mean?
TREADMILLS noun- A piece of indoor sporting equipment used to allow for the motions of running or walking while staying in one place.
- A mill worked by persons treading upon steps on the periphery of a wide wheel having a horizontal axis. It is used principally as a means of prison discipline.
- A mill worked by horses, dogs, etc., treading an endless belt.