Fifteen subjects rode at increas-
UA .w- ing speeds for 2 minutes at each of the three rates. The
c
2 mean values for the 15 subjects at the end of each 2-
8 minute exercise bout were determined to be 120 bpm
5 z at 5 rnph, 130 bpm at 7 mph, and 150 bpm at 9
o mph.