US 5,989,157 · Granted 1999-11-23
The 1999 Patent That Turned Exercise Into a Video Game
Imagine a workout vest packed with motion sensors that turns your actual physical movements into on-screen game action. You punch, jump, or sprint, and the game responds in real-time to how hard and fast you're moving, making fitness feel like playing a video game instead of a chore.
The plain-English version
What it protects
The claim covers a wearable system that combines body-mounted accelerometers and strain gauges with a wireless link to a display, where the user's physical movements and muscle effort directly control game graphics and scoring. What's protected here is the specific method of capturing body motion data, processing it through a microprocessor, and translating that effort into responsive on-screen game elements proportional to exercise intensity.
Why it matters
This patent pioneered the idea of turning raw physical effort into game feedback, merging fitness and entertainment at a time when most exercise was still analog. It anticipated the motion-gaming boom by decades, laying groundwork for concepts later commercialized in systems like Nintendo Wii and VR fitness platforms, where your body becomes the controller.
Real-world use
When you play an active video game that responds to your jumping or arm movements, you're using technology descended from concepts this patent locked down.
Original USPTO abstract
An exercise and game playing system combined, forming a method in which the user gets large muscle physical exercise while at the same time is challenged with game play. There is a torso and limb mounted electronic section incorporating accelerometers, strain gauges, and other instruments, and a microprocessor, and a short range radio or wire link to a stationary base station and a display station. Body activity and exercise produce a display icon responsive to the degree and vigor of body activity. The display is a TV type screen or a head band mounted assembly or goggles of a virtual reality system. The accelerometer signals are double integrated and manipulated to produce useful display on the screen. There is net cursor advancement activity on the screen even when the body returns to the same location, accomplished by introduction of a dead zone in the accelerometer integration paths. A score is kept of how well the user follows the game commands, such as staying within the boundaries of a screen track, or avoiding collision with game obstacles. There are special effects for games, such as triggering the imaginary throw of a javelin or discus, or firing imaginary weapons or setting up a military defense, or imaginary enemies. The display effects are proportional to the vigor of the exercise, and are also proportional to the product of acceleration and applied muscle tension. There is a music source and sounds responsive to exercise effort, and a voice report of the status of the exercise regime and the value of effort achieved. Other elements include: handles for applying force to strain gauges; heart beat sensors, nerve activity and muscle sensors, buttons, and switches.
Patent details
- Publication number
- US 5,989,157
- Filing date
- 1997-07-11
- Grant date
- 1999-11-23
- Assignee
- Walton; Charles A.
- Inventor(s)
- WALTON; CHARLES A.
- CPC class
- A63B71/0622
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