The Baseline Monitor training feedback device is the perfect way for physiotherapists, athletes, trainers and their patients to precisely measure and monitor body movements. Simple device makes it easy to detect changes in air pressure during exercise. Specially designed to support core stabilization training - an effective exercise that can help improve the lumbar spine. Increase or deflate the pressure using the pressure gauge. The pressure gauge measures 0-4 PSI (0-200 mmHg), analog pressure with an accuracy of ±0.06 PSI (±3 mmHg).