Summary: Telepresence technology greatly facilitates martial arts training, granting endless fights to those seeking it.
The tele-rig started off as expensive and impractical peripherals for the adult industry, but they soon transitioned to less intimate outlets. They were adapted into wearable suits and pads, which excited the body through haptic and ultrasound-generated sensations. As the technology spread, martial artists in remote areas used them to practice sparring.
The use of tele-sparring was seen as a supplement, rather than a substitute, to conventional training, at least at first. Two martial artists could fight each other, and feel the full force of impacts (mostly with concessions made for safety) of their blows. Apps and programs for such training devices grew, based on matchmaking software from computer games.
All manner of martial arts proliferated. From medieval sword-fighting to karate to modern tactical marksmanship to wushu, there was something for every martial artist, although grappling, wrestling, and jiu-jitsu were limited compared by the striking martial arts. Due to having global user communities, there were always sparring partners available, for those seeking constant training.
Many martial artists would pit themselves in never-ending bouts until they collapsed of exhaustion. Often younger and reckless, they streamed their unceasing combats online. While potentially dangerous, there were few lasting injuries, although heat stroke, fatigue, and exhaustion were among the worst conditions. The data from such battles was not used solely for ads.
Instead, such data was used to train virtual sparring bots. These software robots, often manifesting as augmented reality or virtual reality foes, simulated combatants more efficient than any human fighter in time. Some were based on historical fighters, based on footage from Mohammed Ali, Bruce Li, or the Gracie family at their prime. Others were supplemented with data from more recent bouts. Either way, even the dead could once more fight the living, although not in the traditional sense. What emerged were fighters trained better than any in prior martial arts history.