I was wondering if it's already possible (and, maybe, affordable) to use drones programmed to fly automatically over a certain curse (via GPS) at a pre determined and constant speed.
That would be a heel of a good pacer as a study even showed that runners feel 'peer pressure' when running with the drone, they felt an impulse, motivation or desire to keep up whit the drone when it started to slip away.
Link of the study:
http://exertiongameslab.org/wp-content/uploads/2011/07/quadcopter_chi2015.pdf