6156
Eight healthy untrained male volunteers pedalled a cycle ergometer according to two exercise protocols: the first involved step-wise increasing physical exercise to maximal ( MPE ); the second involved prolonged (35 min) submaximal physical exercise ( PPE ) at 70% of the individual's maximal oxygen uptake .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities:  
Answer:
 None