Here are some easy ways to introduce activity and movement in the class:
If the students are up and moving in the classroom, they can't be sleeping in their chairs. Now I am sure we all like to think that our lectures and discussions are super stimulating, but some students actually need physical movement to learn (kinetic learning is not just about doing!) I personally think I have my best ideas during my morning walks. Also, some students need movement to keep them alert --- especially those who are in the Corps of Cadets, or those who also have the additional weight of family or work obligations, or those who are simply burning the candle at both ends!