Bystolic and Athletes

I'm a 28 year old male with a history of HTN since 19 years of age.  I have been on Diovan, Diovan HCT, Exforge, Norvasc by itself, and was recently put on Bystolic.  I am 6'0" and weigh 210lbs.  I participate in a high energy interval cardiovascular class two or three days a week and lift weights two to three days a week.  Before starting the bystolic I was Rx'd 10mg of Norvasc once a day, my bp readings were around 130/90 to 120/76, occasionally spiking as high as 145/95 and dropping to 110/70.  My resting heart rate while taking the norvasc was on average 50-55 bpm and up to 170+ during an intensive cardio workout.  My doctor wanted to take me off the Norvasc because she had had several male patients complain of ED after taking Norvasc for several years and that it could be difficult to reverse.  After being on the Bystolic 5mg for a week now my pressure has dropped to a consistent 114/70 with my pulse from 34-50 (50 when I'm up moving around, doing light housework, etc).  I have noticed some dizziness but no edema or episodes of syncope.  I also enjoy socially drinking but have not drank since starting this drug because I am nervous about my low pulse rate.  Is this a safe drug to take for a well trained heart?  Is this pulse rate too low?  Also I have read that Bystolic has a negative effect on blood glucose levels and has caused weight gain, is this also true for people who stick to a consitent workout regemin?  If so, I'm tapering off and tossing this med in the garbage...  Any feedback would be appreciated.