2022 Upgraded Back Stretcher for Lower Upper Back Pain Relief, Fully Adjustable Back Cracker with Magnetic Massage Points, Spine Board

Key features

• ERGONOMICALLY DESIGNED BY CHIROPRACTOR: 1) The best fit back cracking device with 138 massage points and 18 magnet points, based on 700 days research of 2000 backs (others are casual design). 2) Twice a day for 5-10 minutes, just lay there and pop your back, treat pain, improve posture and free up compressed muscle, nerves and discs.
• UPGRADED FULL ADJUSTMENT: The scientific height design (experts’ advice: 1.77" - 2.96" ) is completely adjustable, no gear limit, just easily rotating the under bar, instead of complex 3 level grooves found in others. PS: NARROW SIDE up and WIDE SIDE down, CCW rotation increases the curvature.
• SUPERIOR STRENGTH & FLEXIBILITY: Upgraded ABS plastic, 200% more durable and flexible than others. Up to 330lbs load-bearing, pass 18 tests of stability and tensile strength. Come with soft foam pad (most prefer) and harder silicone strip (a few prefer) for replacement, put it in the center to protect your spine better.
• EASY & WIDE USAGE: 1) No assembly required (others are difficult installation). 2) Portable, compact and lightweight. 3) Perfect for office worker, housewife and driver. 4) One size fits most. Height Range: 5'0" - 6'6" & Max Weight: 330 lbs. 5) Ideal gift for parents or friends who have back pain.
• IMPORTANT: 1) For beginners, lay a towel and start with it low and move up when get used to it. 2) Normally, a little uncomfortable initially when stretching and feel great afterward; 3) Using a pillow and deep breathing help you relax ; 4) If you had surgery or a back injury, consult your doctor before using.