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Performance mouthpieces may help reduce stress during exercise and help athletes to breathe easier, says a piece in the New York Times Fitness Section. Were not talking your generic rubber mouth guard here you know, the kind that turns you into a drooling mess; these hitech mouth pieces created by Makkar and Under Armour can run several hundred dollars to more than $2,000. The thin molds must be fitted by a dentist, and they position Zenith replica watches the jaw to prevent clenching and support breathing in order to aid better athlete performance. According to the article, a study by Rutgers on the Makkar product did not produce outstanding results, but noted that for a performance athlete who has been training for a long time, even a 3, 4, or 5 percent increase in performance is hard to come by. Indeed, many professional athletes use the mouthpieces, including Derek Jeter, Shaquille ONeill, and Terrell Owens.Would you? Lisa Lombardi

In 1976 Certina produced a version of the DS called the Diamaster that was actually worn by a heavyweight boxer born by the name of Cassius Clay.This watch was advertised as being virtually un-scratchable.More recently, Certina has adopted a heavily Replica Rolex watches European focus and has acted as sponsor to the BMW Sauder F1 team in addition to some high profile motorcycle racers.Certina is now considered by Swatch to be their leading mid-ranged Mohammed Ali and his 1976 DS Diamasterwatch world wide, although we think our friend Dennis Philips might have something to say about that.

We don't think either brand is better than the other, simply different.Hamilton is rugged and military inspired, certainly American by design. Replica Breitling watches Certina, which uses many of the same movements as Hamilton, is more stylish and sporty, with a European flair, and we have to say we like that.Click here to visit Certina's official site.We absolutely love their new automatic DS Prince and DS Podium watches.And because we thought we might get some emails asking for where to look for a great vintage Certina, here is a relatively rare DS PH200 diving watch from the 1960s. Hodinkee in Certina, Hamilton Saturday, January 3, 2009 at 4:36PM