Calories burned by lifting 10lb dumbbells?

That will depend on a lot of factors, like:

1. Your weight. Calories burned during any activity is always related to how much you weigh. The higher your weight, the more calories you'll burn.

2. What exercises you're doing. Lifting a 10 lb dumbbell in a lateral raise while doing a lunge burns a lot more calories than standing in place, doing a bicep curl.

3. Your current level of fitness/strength. You burn more calories on activities your body isn't accustomed to doing.

4. How intense the exercise is for you. Vigorous lifting that gets your heartrate going and your muscles burning is going to burn more calories than light/moderate lifting. How used you are to the weight you're lifting and whether you're doing any other activities (like cardio intervals in between sets, for example) will determine your caloric burn.

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