I have a program laid down by a Trainer to help me get my biceps/shoulders/tricepts look "cut" (that is, with a nice separation between the muscles).
Arms are small muscles so I cannot expect to burn a lot of calories when working them out.
However, my heart monitor (which is very reliable) says that after 45 minutes of arms training I burn around 75 Kcal.
As 75 Kcal is a very low amount, I am wondering if I'm doing something wrong.
Note that I can barely get to the end of the last rep (12 reps x 4 sets x each type of exercise), so the weight I am using should be fine.