If there are any rowing fanatics out there, or competitive rowing coaches, take a look at this cool in-boat rowing instrumentation product.
"The RowMetrics system is innovative in-boat instrumentation bundled with software to provide a complete measurement system.The revolutionary force sensors installed between the foot stretchers and the rails capture the amount of force being exerted by each rower on a stroke by stroke basis. It measures the balance between the right and left feet for each rower. Also captured is the total boat's performance and the deceleration after catch. " (from ChampionMetrics web ite)