Subject: How many calories (kCal) are burned doing arm curls?

I was trying to calculate the number of calories are burned 
lifting weights (for lack of better words) I used the following:

a=2d/(t^2)

The distance from the highest point to the lowest point was 
calculated at 0.60 meters.  The time to lift the weight was 
approximately 0.54 seconds, assuming half the time to lift and 
half to lower.  I calculated an accerleration of 4.115 m/(s^2).

Using W=mad, where the mass of the weight was 4.54kg.  I 
calculated the Work done to be 11.210kJ.  Using an approximation 
that 1 kCal (C) = 4.154 kJ.  I calculated the kCals burned to be 
2.7, which seems a little high.  Can you please indicate if I am 
making an error, and if so, where?  One further question, does 
the path of the weight have any effect on the number of calories 
burned (straight up and down versus in a semi-circular path)?

Re: How many calories (kCal) are burned doing arm curls?