2395
Heart rate ( HR ) , rectal temperature ( Tre ) , blood pressure , temperature and relative humidity changes inside clothing were measured on 18 professional firemen ( mean age 29 . 4 + / - 7 . 4 yr , VO2 max 41 . 4 + 8 . 8 ml kg - 1 min - 1 ) wearing fire fighter ' s uniforms ( SU ) or aluminized , fire resistant , impermeable clothing with self contained breathing apparatus ( FE ) .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None