The respiratory system of the body can be injured by volcanic that comes from a volcanic eruption. boulders ash rock

The respiratory system of the body can be injured by volcanic ash that comes from a volcanic eruption. You can inhale this ash and it can get into your body and system and mess with your inner organs. I don't see how this can happen with boulders and rocks, as they are way too big to be inhaled the way ash can be.

True, using a pedometer can promote a physically active lifestyle.