The Zona Plus is a blood pressure reducing isometric exerciser that was developed from technology used by the U.S. Air Force to improve F-16 pilots’ blood circulation. This exercise device claims to reduce your blood pressure without medication and clinical research by cardiovascular specialists shows the device lowers blood pressure in 90% of users who perform the therapy 12 minutes per day, five days a week. Simply hold the device and squeeze as hard as you can; the unit measures your maximum hand strength and calculates a target pressure that is 70% below your threshold. The handgrip then prompts you to maintain the target pressure, indicating when to squeeze harder or loosen your hold with audible tones and visual cues on the LCD. The price is $379.95, which might raise your blood pressure.