Increased playing time translates directly into increased impact shock from ball strikes, especially off center hits. Impact shock exacerbates all of the known risk factors, and today's high-tech polyester and co-polyester strings, because of their inherent stiffness, are well known to increase impact shock. As a string manufacturer we hear complaints about this from customers all the time. One player noted that playing with poly string was about as comfortable as "hitting a brick wall with a baseball bat."
And in the last few years, more and more junior players have begun using poly and co-poly strings to generate more spin and improve their baseline game. The result is more wrist and shoulder injuries, and more tennis elbow.
We and many leading stringers recommend switching to a softer, more arm friendly string to alleviate or reduce the risk of such injuries. Natural gut has always been the benchmark for soft playing strings, but some of the newer high-tech materials like Zyex® are also known to lessen impact shock.
But it's not just a question of a softer string. Players don't just want a soft string, they want one that helps improve their game. Zyex-based strings like MonoGut® ZX line offer several advantages over polyesters in this regard as well.
First, Zyex is a soft, arm friendly string material. Second, it has excellent dynamic stiffness, which, in addition to softness, generates tremendous power. We call it 'Soft Power.' Third, Zyex in monofilament form, like our MonoGut ZX, offers spin potential which is right up there with polyesters. Finally, Zyex-based strings offer excellent durability and have natural tension holding characteristics that keep them fresh in your racquet far longer than other materials.
Here's what Geoff McKee, stringer and father of one high performing junior, said of his daughter's experience:
"Clare had been a top 10 junior in Florida. At the age of 12, she had to drop to 6 hours a week on court due to wrist and elbow tendonitis. Her growth spurt and joint hyper-mobility worsened the tendonitis. Soft strings helped, but south Florida humidity and damp clay courts shortened the life of gut strings to about 3 hours. Having noticed that Tennis Warehouse rated Ashaway MonoGut ZX Pro as the softest non-gut string, I had my daughter try it and she liked it right away. She has built up to 24 hours a week on court and has been injury-free since she began using Ashaway MZX Pro 17 months ago. In addition to being the softest non-gut, Ashaway is much more lively than any string that is of comparable durability. I string her racquets at 58 mains, 57 crosses, matching the tension I used for natural gut."
We offer two versions of our Zyex-based MonoGut tennis strings, 16 gauge (1.27 mm) MonoGut ZX, and 17 gauge (1.22 mm) MonoGut ZX Pro. MonoGut ZX Pro is a thinner lighter string, designed to provide even better elongation, snap-back and playability for players who do not require the added durability of a 16 gauge string. Both strings offer 100% Zyex monofilament construction, which provides exceptional dynamic stiffness and gut-like playability. The total lack of polyester increases elongation and decreases stiffness for comfortable soft power.
MonoGut ZX and MonoGut ZX Pro are designed for players seeking both gut-like playability and superior durability in a solid monofilament string, as well as for players using monofilament strings in hybrid stringing patterns. MonoGut ZX and MonoGut ZX Pro come in either a natural gut-like tan or fiery red. They are available in 40-ft (12 m) sets and in both 360-ft (110 m) and 720-ft (220 m) reels. Recommended stringing tension is up to 60 lbs. (27 kgs)
Many players afflicted with tennis elbow - senior as well as junior - have found relief by switching to softer, more arm friendly strings. Our MonoGut ZX is certainly not a cure for tennis elbow. Only rest and restorative therapy can do that. But it certainly can help prevent the malady, and may also improve your game. Says Clare McKee, "I like Ashaway MonoGut ZX Pro because my arm doesn't hurt when I use it and it is powerful."
ZYEX® is a registered trademark of Victrex Ltd.