As an example, the user can ride a stationary exercise bicycle for a duration of {TAIL ~ time}, such as {HEAD ~ 15 minutes} 
As an example , the user can ride a stationary exercise bicycle for a duration of { TAIL ~ time } , such as { HEAD ~ 15 minutes }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD