腕の疲労

Arm strain typically comes from repetitive motion, poor wrist alignment, or holding your arms in an unnatural position for hours. Common culprits include typing with wrists bent upward, using a flat mouse that forces your forearm to twist, and sitting with shoulders hunched forward.

Yes. Split keyboards allow your hands to rest at shoulder width, reducing the inward angle of your wrists and easing tension in your forearm muscles. Many users report less fatigue in their arms and shoulders after switching to a split design.

Vertical mice and trackball mice are both excellent choices. Vertical mice keep your forearm in a neutral handshake position, reducing rotation. Trackball mice keep your hand completely still, eliminating arm movement altogether – ideal if you have limited desk space or significant arm fatigue.

Not necessarily. Switching either your keyboard or mouse can help, but using an ergonomic keyboard and an ergonomic mouse together provides the most complete relief – they work synergistically to keep your entire upper body in a natural posture.

Most people need about one to two weeks of regular use to fully adapt. Start with short sessions and gradually increase time. After the adjustment period, many users cannot go back to standard devices.

Yes. All ProtoArc split keyboards, vertical mice, and trackball mice support Bluetooth and 2.4G wireless connectivity. They have built‑in rechargeable batteries with USB‑C charging – no disposable batteries needed.

Absolutely. Connect via Bluetooth to Windows, macOS, iOS, iPadOS, and Android. Multi‑device pairing allows you to switch between computer, tablet, and phone with one button.