• Before each workout, check for possible wear of the Xertube.
• Always perform general warm-up activities prior to performing Xertube exercises.
• Perform only the exercises as shown in this chart or other SPRI produced information resources.
• Avoid exposing the Xertube to rough or abrasive surfaces.
• Wear appropriate footwear while using the Xertube.
• Make sure the Xertube is secure in hand and under/around foot before beginning each exercise.
• Avoid placing the Xertube under a step. Use either the Step attachment or the Step tube.
• Perform exercises in a slow and controlled manner.
• keep abdominal muscles tight while performing exercises.
• Avoid straining or holding your breath while exercising.
• Discontinue any exercise that is uncomfortable or causes discomfort.

Warnings

SPRI Products, Inc. is the leading manufacturer and distributor of rubberized resistance exercise products for the health and fitness industry. SPRI designs and produces innovative rubber resistance exercise products and has led the way in popularizing rubberized resistance workouts.

As the pioneer of this simple, but effective method of strength training, toning and building lean muscle tissue, SPRI has remained on the cutting edge of today's exercise trends. SPRI continues to expand into related markets as new applications are discovered and professional and consumer interest builds.
As the fitness industry continues to evolve and move toward convenience and affordability, our line of products has grown to include educational materials, instructional manuals and videos, fitness equipment and accessories.

Their Mission Statement 
They strive tocreate, design and provide state-of-the-art resistance exercise products, never losing sight that their most important goal is customer satisfaction. Their products are of the highest quality and are backed by market research, education and strategic alliances that generate and maintain customer loyalty. They will accomplish their mission by continuing their partnership philosophy with their employees, sales reps, vendors, workshop presenters and customers. They will continue to conduct their business with same spirit and morals that of resistive exercise products to the fitness professional, exercise enthusiast and fitness industry.