Interactive Punching Bag Project Help

Hi, this is my first post on this forum and i just started working with my Arduino about 5 months ago, and so far I love it! I have the Uno model. During this upcoming summer i would like to build an interactive punching bag similar to the one in the video that is attached. I would greatly appreciate any help or advice anyone can give me about what i would need, the code needed, and methods of completing this project. Thank you all in advance for all your help.

--APMAC2

you need an accelerometer for that - or maybe three at different heights - to measure the punch.
Code for such sensors is e.g. on the playground and I think in the tutorial section..