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Alpina Sierra 75 Touring Boot
For the Sierra 75 Touring Boot, Alpina took the proven uppers of their most popular boot, the BC 1550, and fitted them to a 75mm sole. The result is pure touring gold. Solid, supportive uppers with a powerstrap and plastic heel support give you the control and stability you need to put the miles behind you. The Sierra is lined with Thinsulate insulation to keep your feet warm for longs days out. The 75mm sole gives stable performance with minimal moving parts, so you can spend more time skiing and less time whacking snow off your boots.
On Sale
$144.95 $86.97 
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Training Tips
When buying a new pair of running shoes, bring your old ones with you. You will get a better fit if you know if you supinate or pronate.
Heart monitors are useful for knowing when you are in the right zone for your training efforts. If you understand what your maximum heart rate is, you can set up your monitor to beep at you when you exceed the high or low range of your heart rate for the type of workout you are doing.
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.
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