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K2 Public Enemy Alpine Ski
The K2 Public Enemy Alpine Ski's 'hood is the park, but it's a legit big-mountain ride as well. And for the 2005-2006 season, the Enemy returns bigger and badder than ever with an extra 5mm of width in the tip, waist and tail. The Enemy's graphics are toned down a bit from the past, but K2 strengthened its build with ABS sidewalls and 2.5mm-wide edges. Go ahead and stomp on the most burred, damaged, ghetto rails you can find. The PE's already taken some metal, with its .45-automatic shell-casing tip and tail rivets. With a phat 85mm underfoot, the PE is tough enough to survive backcountry booters and big mountain lines. The Enemy can hang.
$399.95 
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Training Tips
Cross training gives your body a chance to recover while still exercising. If yesterday has a hard run day up and down hills, then today's bicycle ride gives your aching knees a well deserved break.
Anaeroic threshold is when lactic acid starts to build up in your body as your muscles are not getting the oxygen they require. This threshold is typically expressed as a percentage of your VO2 max - the amount of oxygen per kilogram of weight that a person can use in converting fuel to energy. Elite athletes threshold might be as high as 90% of VO2 max.
Efficient running position allows you to run farther and faster. Keep the heel raise to a minimum, relax your upper body and hands, keep your upper body poised and quiet.
If you want to make progess in your training, join a running group. A commitment to meet on a regular basis with a group of like minded individuals will help you keep your focus.
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