Originally Posted by Kframe38
That explains why it dosent feel like im using much energy when i do the speed bag. Is there any websites i can go to learn more about the relationship between work outs and metabolic rates?
I could not give recommendation for any one website, but if you enter 'metabolic rate exercise' into Google you will get a lot of basic information.
I would also suggest that you have a chat to your trainer, they have wise old heads, and in my experience tell you the facts without the jargon.
Continued good luck.