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Skiing is a great outdoor activity and something a lot of people look forward to during winter. However, enjoying the game depends a lot on the kind of equipment one has because the inappropriate equipment can ruin a good performance and make any skiing activity regrettable. The most basic equipment in skiing is the ski, whether you are into downhill skiing or cross-country skiing. In snow skiing, snow skis must be made from durable material that can be controlled easily by the skier.

Skis

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Because being able to ski properly depends a lot on the quality of skis, one has to make sure that the skis you will use are able to survive the harsh conditions of the extreme cold. The snow skis should be able to provide control and safety for the skier.

Originally, snow skis were made from wood. However, because wood has the tendency to weaken with age and in most cases is not impervious to moisture and the extreme cold temperature, the quality of skis made from wood is not something that can guarantee better performance for the skier. As such, other materials were utilized in making skis.

Characteristics of Good Snow Skis

In designing snow skis, a lot of factors are taken into consideration. This is because snow skiing involves a lot of risks and challenges that are not usually encountered in other varieties of skiing. For one, frequent exposure to the extreme cold can weaken the material as well as increases the chances of the wear and tear provided in several obstacles encountered during skiing. That is why snow skis are made to be much more dependable and sturdy than other form of skis.

When choosing snow skis, the following factors should be taken into consideration:

▪Durability. Skis must be made from extremely sturdy materials to make them withstand the rigors of wear and tear from usage. In terms of durability, some skis are made from composite materials that enhance the strength of ski.

▪Lightweight. A light ski is preferred over a heavier one. This is because a light ski allows for better control and will free the legs and body from getting easily exhausted from too much exertion in trying to control the ski in negotiating the ski tracks.

▪Compatibility with ski boots. Because ski boots are the main equipment that skiers wear to protect their feet, the skis must allow for just the right fit.

▪Streamlined design. Streamlining is a principle that is widely applied in activities where speed is important. In skiing, streamlining works by making skis with a smooth glide over the smooth surface. In turn, this will allow the skier to assume better control, maneuverability, and speed.

▪Proper dimensions. The proper dimensions of the skis have something to do with the nature of the skiing activity that one will be engaged in. In cross country skiing, wider skis are used while in downhill skiing, thinner skis are employed.

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Equipment For Outdoor Runner

Equipment for outdoor runner

The great thing about running is that it requires so little equipment to do it. You can simply get dressed, put on your shoes, walk out the door and run. To obtain a good idea of your training heart rate, you need a watch and the ability to count. However, if you choose to be more precise about your training there is a range of equipment available to help you on your way.

Heart Rate Monitor

When you get to the point where you want to add interval training to your running regimen, you may want to investigate using a heart rate monitor. It can give accurate and instantaneous information on how hard your body is working by measuring your heart rate beats per minute (BPM) and will allow you to run in your optimum training zone.

Global Positioning System (GPS)

Wrist mounted GPS watches are now very small, light and compact and available for less than $150. The can give you instantaneous speed and you miles per minute rate. They measure elevation changes, display your current speed and total distance. The information is stored in the watch and can be downloaded onto a PC when you get home. Your route is plotted on a map and you can see your speed against location. Some models such a Garmin have a heart rate monitor integrated into the same device as the GPS.

Pedometer

This is a small device that clips onto your waistband and calculates the distance of your run based on stride length, which you must program into your device first. It will also estimate your speed, time and calorie burned. Some come with a personal alarm which is a useful safety precaution. A pedometer is not as accurate as a GPS as the main down side is your stride length varies depending on your speed.

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Article Source:http://www.articlesbase.com/sports-and-fitness-articles/equipment-for-outdoor-runner-1585735.html

Equipment For Outdoor Runner

Equipment for outdoor runner

The great thing about running is that it requires so little equipment to do it. You can simply get dressed, put on your shoes, walk out the door and run. To obtain a good idea of your training heart rate, you need a watch and the ability to count. However, if you choose to be more precise about your training there is a range of equipment available to help you on your way.

Heart Rate Monitor

When you get to the point where you want to add interval training to your running regimen, you may want to investigate using a heart rate monitor. It can give accurate and instantaneous information on how hard your body is working by measuring your heart rate beats per minute (BPM) and will allow you to run in your optimum training zone.

Global Positioning System (GPS)

Wrist mounted GPS watches are now very small, light and compact and available for less than $150. The can give you instantaneous speed and you miles per minute rate. They measure elevation changes, display your current speed and total distance. The information is stored in the watch and can be downloaded onto a PC when you get home. Your route is plotted on a map and you can see your speed against location. Some models such a Garmin have a heart rate monitor integrated into the same device as the GPS.

Pedometer

This is a small device that clips onto your waistband and calculates the distance of your run based on stride length, which you must program into your device first. It will also estimate your speed, time and calorie burned. Some come with a personal alarm which is a useful safety precaution. A pedometer is not as accurate as a GPS as the main down side is your stride length varies depending on your speed.

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The Importance of a Training Log – For Runners

A training log is one of the most practical tools you can use in becoming your own coach. Keeping a log of your workouts is essential for monitoring your performance and tracking your improvements. It gives you an accurate idea of where you were when you started and how you have progressed from there in terms of fitness and motivation. It is also useful in determining what type of regimen works best for you.

A log is valuable for many reasons. It will force you to be honest with yourself as you set your reasonable, incremental and attainable goals. When working solely from memory, people often subtract time when running for speed and add a little time when running for distance. These little white lies are a natural tendency, but they can skew your data and prevent you from setting your optimum goals, which can thwart your progress.

Training logs are wonderful tools for recording what you have achieved. You can look back and take stock of your progress and the physical and emotional state you were in at the time.

The words in your log can be written down anywhere. Some people use free calendars from hardware shops or insurance companies that arrive in the post. Those squares are just big enough for the vital information. Now we have computers so the digital option is also there.

In your log you should record the date, time distance and your emotional and physiological state. A beginners log might read Oct 7, 7am, 1.5 miles, 15 minutes; good mood; strong.

When you have acquired a few months worth of data they are great to look over. They can also give you inspiration when you are recovering from injury as you can see how long it takes to get back to your regular mileage and time.

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Resistance Training For Runners – Why It’s Important

It is important that resistance training is incorporated into any running program, no matter what your age. The routines do not have to be complicated and as is with running, consistency is much more important than perfection.

Most competitive long distance runners supplement their training program with resistance routines. The increased muscular power it yields, particularly in the lower body, gives runners a competitive edge. While racing. In other words, more muscle strength will probably enable them to run a bit faster over the last ¼ mile of a race and helps delay the muscular fatigue that causes runners to go anaerobic. These benefits are universal and anyone can use resistance training to boost their running performance.

Another benefit of resistance training involves body balance, which running and daily strains can cause to fall out of healthy proportions. Certain opposing muscle groups, such as the quadriceps and hamstrings should fall within a certain range of relative strength. The ratio of strength should be roughly 60% in the quadriceps to 40%in the hamstring. Maintaining this ration is good insurance against injury, since it prevents either set of muscles from bearing the brunt of your running.

Resistance training also helps assure a left-right side balance of 50% to 50%, which also helps to guard against injury in much the same way. Not only does a balanced physique guard against potential injury but it looks great too. Below are some of the other benefits.

A more attractive streamlined body
Increased base metabolic rate
Increased base running pace
Delayed atrophy of muscle associated with ageing
Prevention of injury by strengthening muscles around joints and balancing muscle ration
Better posture and muscle longevity

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SQL Server – Retrieving a Range of Rows With Multiple Nonclustered Indexes on the Table

Take the following query:

SELECT * FROM accounts
WHERE
BalanceRemaining BETWEEN 100 AND 200
AND
CustomerNum BETWEEN 1000 AND 1200

If no relevant indexes exist on the table, a table scan would be performed. If a nonclustered index exists on the BalanceRemaining column, the query optimizer might use that index. This would depend on the number of records returned. If too large, the index would be ignored. If a nonclustered index exists on the CustomerNum column, it might be used by the query optimiser if numbers are no too large..

If the query optimiser chooses to use one of the indexes, then SQL Server would process the range specified in the where clause by issuing a data page request for each pointer (assuming there is no clustered index on the table, so we are dealing with Row ID’s).

As each row is returned, the remaining criteria would be applied to the row. You could say the data has been filtered. The problem with this type of technique is that it’s inefficient. If we have a non-clustered index on the BalanceRemaining column and the query optimiser decides to use that index to perform the above query. The index may have, for example, 200 leaf level index key values that meet the BalanceRemaining range, and 200 data page requests will be performed. When SQL Server applies the CustomerNum filter, most of the data rows from the result set could be eliminated

The nonclustered index has been used index to retrieve a row set, most of which were discarded. Retrieving data pages is a very expensive operation in terms of resources and data returned..

However, if a second nonclustered index is created on column CustomerNum, the query optimiser will use both of the indexes in a lot of cases in the optimiser plan. The result of the query that have a BalanceRemaining between 100 and 200 and the set of accounts that have a customer number between 1,000 and 1,200 is the set intersection of the set of accounts.

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