I bet you could homebrew an electromyograph pretty easily. It probably wouldn't be particularly accurate, but you could probably achieve enough precision to pro

I bet you could homebrew an electromyograph pretty easily. It probably wouldn't be particularly accurate, but you could probably achieve enough precision to provide repeatability and measure day-to-day variance. Edit: Hackaday had an article about a simple EMG recently https://hackaday.com/2016/11/20/emg-tutorial-lets-you-listen-to-your-muscles/ https://hackaday.com/2016/11/20/emg-tutorial-lets-you-listen...