Not put too much effort into one’s yoga, working out (2,4,2)

I believe the answer is:

go easy on

'not put too much effort into' is the definition.

'one's yoga working out' is the wordplay.
'working out' is an anagram indicator (an anagram must be worked out from the letters).
'ones'+'yoga'='onesyoga'
'onesyoga' anagrammed gives 'GO EASY ON'.

(Another definition for go easy on that I've seen is " To spare harsh treatment".)

I've seen this clue in The Times.

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