Like the title says, What is a good weight for a hanging punching bag? I want it to be heavy enough to provide resistance to fairly hard punches and kicks, but not be so heavy that it barely moves and feels like a rock. It should be heavy enough that a good kick will make it swing about 4-6 inches. I'm assuming that bags in Canada are sold in pounds just like in The States. If not, just tell me the weight in kilos and I'll convert it to pounds.
Would nonstop punching and kicking a bag be considered moderate or vigorous exercise?