Weightlifting Fatigue and Power Sensor

Hack Details: A small sensor that could be attached to a bar/dumbbell which can measure the power output over a number of repetitions. This data could be used solely for measuring power output or used to detect a drop in power indicating fatigue and letting the athlete know when to stop their exercise. Expensive version is here: http://store.sorinex.com/Tendo-Weightlifting-Analyzer-p/t-2.htm
What you need to make it happen?: hardware person to build sensors, computer coder to develop code to interput the date (I may be able to help with this via Matlab), general help with idea development.
Your name: Alan Armstrong
Twitter/website:@alanarmstrong5