11837
Among men , energy expenditure at work was significantly lower in non - obese ( 9 . 0 +/- 8 . 2 vs . 11 . 3 +/- 9 . 3 METs ( metabolic equivalents ) , P = . 025 ) and obese ( 9 . 0 +/- 7 . 9 vs . 11 . 6 +/- 9 . 4 METs , P = . 017 ) subjects with a clustering of MetRFs than in those without .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None