Garmin, in recent years, has made the GPS fitness sports watch their own. The early Garmin Watch models, 101, 201 and 301 were ahead of their time, but the next generation of GPS watches released a few years ago (the 205, 305 and 405) had much improved GPS chipsets enabling them to lock onto a signal much faster than their predecessors and perhaps more importantly, stay locked on.

If you are looking to take their training to a new level, you should consider what a GPS watch has to offer.

A GPS watch can measure your speed and distance traveled as well as plot an accurate route of your runs which can be viewed on computer. It is a fitness trainer, coach, and essential analytical tool all in one that allows you to set speed or pace alerts to notify you if you are running too fast or too slow, plus a lot more.

In April of 2009, Garmin released an upgrade to the Forerunner 305XT, which is based on Garmin's exhaustive analysis of athletes feedback and has resolved in some pleasant changes.

The first way the 310CX differs from the Forerunner 305 is it's looks.

Like the Forerunner 305 this watch is large and chunky and does not pass an every day watch, but with extra size comes much greater functionality. The 305XT has the same large-sized screen, but a stylish silver face opposed to the red of 305 and blue of the 205.

Incidentally the 205 and 305 Garmin watches are identical except the 205 monitor device, the new 310XT does not have two distinct models.

The new watch features the same button layout, the only difference is the two buttons on the front of the watch are smaller in size then it's predecessor. It's unclear if this is and advantage or disadvantage in practice, but I'm guess it's not a lot different.

Perhaps the most noted advantage of this watch is the fact that the Forerunner 310CX is water resistant to 50 meters . The Forerunner 305 is water resistant to IPX7 standards, which means it can be submersed in water to 1 meter for up to 30 minutes without harm. While triathletes will be rejoicing at this feature, it should be noted that heart rate monitoring and GPS features do not work while you are swimming .

Never-the-less, this watch can be used to time your swims without fear of harm which will please many.

The other big advantage of the Forerunner 310XT is its 20 hour battery life .

GPS watches consume a lot of power when in full GPS mode. The Forerunner 305 has a typical battery life of around 8-10 hours. While this is enough for most activities, some ultra endurance events can extend well beyond this limit. With an 100% + increase in battery life to around 20 hours, the new Forerunner watch will clearly please ultra athletes for who the old limitation was a problem.

The Garmin Watch comes with a rechargeable battery . While jacking it into the recharger overnight is not a major deal, not having to do so every night will certainly be a welcome change for most users.

Other improvements include a better GPS receiver with the addition of HotFix, heart rate based calorie computing and wireless computer connectivity via an ANT stick. The wireless setup is the same as the Forerunner 405's, but unlike the 405 the 310XT does not support unit-to-unit transfer.

While the new upgrades are exciting, the 310XT does feature some not downgrades that Garmin has been quiet about. There is no support for routes, whereas the Forerunner 205 and 305 could store 50 routes in memory and no simple workouts, a quick-start mode where you enter time, distance or calorie goals and off you go.

So in summary, the Forerunner 310XT differs from the 205 and 305 Forerunner watches in these ways:

  • New stylish look and feel
  • 50 meter water resistance
  • Heart based calorie calculation
  • Extended 20 hour battery life
  • Improved GPS reception
  • Wireless connectivity to PC or Mac
  • No support for routes
  • No simple workouts

Overall, the new watch from Garmin is not revolutionary, but it is certainly very cool! It …