Vibration proofing a gym - why deadlifts are the hardest problem, by far.

NYC is a difficult place to build a gym, and vibration issues make it even harder. Deadlifts present the biggest challenge by far - their low frequency, high amplitude forces can shake entire buildings. After countless platform iterations, I've found something that actually works. This is a detailed overview of how we found the right materials using physics and years of trial and error, finally solving the deadlift problem that plagues urban gyms.