tokens: The fatigue exercise showed relatively high blood lactate concentration [ 12.5 ( SD 2.6 ) mmol x l ( -1 ) ] and an increase of serum creatine kinase ( CK ) activity delayed by 2 days [ 540 ( SD 407 ) U x l ( -1 ) ] .
folded_tokens: the fatigue exercise show relatively high blood lactate concentration [ 12.5 ( sd 2.6 ) mmol x l ( -1 ) ] and a increase of serum creatine kinase ( ck ) activity delay by 2 day [ 540 ( sd 407 ) U x l ( -1 ) ] .