Patent 7455632 was granted and assigned to Spri Products on November, 2008 by the United States Patent and Trademark Office.
An exercise device for use in connection with various types of exercise and activities, including, for example, Pilates, yoga, core conditioning, stability, stretching, and physical therapy. The exercise device includes an indicator for quantifying resistance force applied by the resistance tube during stretching of the tube. Repeated use of the exercise device can be used to identify strength gains.