Yes, after doing handcycling for over a week now, I'm well aware it is definitely a cardio exercise that gets the HR up.

What I'm wondering is if this activity, overtime, can reduce one's blood pressure, since it will widen and make more flexible the blood vessels in the upper body. Seems like with larger blood vessels in an area that doesn't normally receive cardio exercise that this should lower one's blood pressure, albeit, probably by a minimal amount.

I took my blood pressure after doing an hour of handcycling and it was 102/60 and little lower than normal. However, when I take my BP after cycling it can go as low as 85/55. (I know these numbers after exercise are only because my blood vessels are at an abnormal expansion, compared to normal and the BP goes up to one's normal level overtime).

If nothing else, my arms should look tight and toned like my legs, unlike the twigs many cyclists carry around