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Skaters sometimes combine different hardness wheels on the same skate in an attempt to achieve the best combination. Skaters also refer to wheel "rebound". This refers to the relative height to which a dropped wheel rebounds. It is a reasonable comparative indicator of the relative energy absorbed by elastic hysteresis of a wheel during skating. Bearing sizes have been standardized around the popular series. A smaller and lighter series has had limited acceptance. Bearing manufacturing precision generally run from ABEC -1 to ABEC, and some skate bearings are additionally designed to be "loose" to minimize ball rolling friction.
Various grades of steel offer better hardness, rust resistance etc. Bearings with ceramic balls and races have been available since the late s They are lighter and longer lasting, however significantly more expensive. Black silicon nitride ceramic is superior to white zirconium dioxide ceramic, since it is considerably harder and tougher. At the modest rotational speeds encountered in skates, manufacturer data suggests negligible difference in friction performance between the various bearing materials.
At these speeds, ball bearing friction tends to be dominated by seals and lubricants. Bearing shields reduce the entry of dirt into the bearing. Metal and rubber non-contact shields are commonly used, of which rubber shields are slightly more effective. Neither shield type is totally effective, often resulting in the need for bearing maintenance.
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The ball retainer is usually made of either metal, plastic, or glass. Plastic types are preferred since they are quieter. Bearing lubrication is usually either light oil or grease. Synthetic types last longer before breaking down. Grease assists in holding dirt away, and stays in the bearing longer, reducing maintenance and increasing bearing life. The lifetime of bearings used for outdoor speed skating is often quite limited due to damage caused by dirt ingress. These bearings are usually cleaned by soaking them in petrol overnight and then cleaning the dirt.
In search of the maximum speed the principal goal is to minimize wind resistance, hence the use of skinsuits, special helmets and techniques. The second issue is elastic hysteresis energy absorption in the wheel. The distant third is bearing internal friction, a set of bearings in good condition, properly inserted and lubricated is normally enough. Mechanically, strokes in speed skating are deeper and faster to a sharper angle, closer to the point of losing traction than recreational skating but not as deep or as fast as in ice speed skating.
This is because of the greater frictional forces in the direction of travel and lesser ability to apply friction without slipping of wheels on a hard surface compared to a steel blade on ice.
Speedskaters move each foot across the center line of travel, leading to the double push , a method named by United States skater Chad Hedrick this is a normal efficient skate technique that is learned as skater gets comfortable with skates. The technique allows two pushes in each stroke of the skate. However, it can be tiring for inexperienced skaters who have improper technique and they will often save it until needed, such as the latter stages or final sprint of a distance race.
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With proper execution, the double push is an energy saver. The double push is mostly used in outdoor racing and the straightaways of indoor skating. During Sprints, skaters need to initially push their body with force to get a jump start. For this they tend to take quick and sharp strides. Once they have achieved a good pace, they move to taking comparatively longer strides. Speedskaters also need to take care of their body posture during all of this.
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They usually bend from their knees to maintain a low posture. This has two advantages. First of all, it increases the reach of the skater's legs, which results into even more powerful strides. Secondly, a low posture reduces the total surface area of the skater's body that comes in contact with the resistive air, thus providing an aerodynamic advantage. Turning is significantly more difficult with inline speed skates than recreational skates because of more and larger wheels, creating a longer wheelbase.
The wheel profile, that is, the cross-section, is parabolic, with a sharper shape than recreational or aggressive wheels, allowing the skater to essentially skate on a smaller, and hence more agile, wheel when leaned over in a turn. Brakes are not generally used on speed skates so various other techniques to slow down are used, such as slaloming skating s-curves or v-plowing or "snow-plowing" , where the heels are pushed outward and the toes inward.
It is not readily obvious to an observer from a skater's stance that the skater is v-plowing, if it were the skater would quickly crash. The v-plow is often the stop used in situations where there is little lateral and forward room to stop.
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One technique is the T-stop, essentially dragging one foot perpendicular to and behind the other, however this wears the wheels of that skate quickly. Another stop involves picking up one foot and setting it down quickly and repeatedly somewhat perpendicular to the forward motion while keeping weight on the other foot. Hockey stops are possible on speed skates, but require a very deep lean in order to cause the wheels to lose traction and slide, also the fact that wheels are sliding means that the wheels are also wearing down very quickly. Grass runouts are always a last option, given an adjacent grassy area.
An inline speedskater takes much time to stop and often has still fewer options in an emergency, often taking several hundred feet on a level surface to come to a stop at a full, controlled deceleration. Thus, a skater should be familiar with and proficient in stopping techniques before attempting difficult situations such as heavily travelled roads or hills.
Inline speed skating requires professional athletes to go through intense physical training. A strict diet and a rigorous training schedule has to be followed. The training schedule is mainly designed to build and maintain strong thighs and calves. But skating, just like swimming, requires the use of the whole body. Therefore, it is critical that the whole schedule is well balanced to attain and maintain a sturdy upper-body too. Also, a flexible upper body is preferred, which could help in maintaining the balance of the body in a better way.
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A heavy, protein-rich diet is required to be followed. Wheels and bearings used for practice generally require much more efforts to gain some momentum and speed, as compared to the ones used in competitions. Ultra distance training requires years of training, time, and dedication to reach world class levels. In outdoor inline racing events, team tactics may apply. If so, tactics are similar to those of marathon ice speed skating and of road bicycle racing , in which members of the team perform specified roles.
Skaters tend to form packs or "pacelines", or "pelotons", in which skaters line up behind a lead skater and match their stride, thereby saving energy by skating in their draft. Sportsmanship requires that skaters in the paceline share the duty as paceline leader. Those who never "take a pull" at the front are likely to find other skaters tactically working together to defeat them. During the course of a race skaters may make "attacks", speeding up the pace in an effort to weed out the weaker and slower competition.
These attacks may include "breakaways" and "fliers", in which skaters try to create new smaller and faster packs or else to escape entirely from the other skaters. Depending on the length of the race and the skills and the cooperative effort of the chasers, these breakaways may or may not prove successful. If a skater escapes a pack in order to join a successful breakaway group, it is known as "bridging up".
When skaters who are member of teams participate in a race together, they often have pre-determined roles. One or two would be designated attackers whose role it is to tire out the competition. Another skater may be the designated winner for the team, and he may avoid chasing any breakaways until late in a race, possibly until the final sprint if the lead pack has never broken up.
Quad roller-skating racing is the precursor to the popularity and acclaim received by competitive racing on in-line skates. Up until all World Championships were held on quad skates. Most events at the World Championships were specific to quads, however, some events were classed as "open" giving the athlete the option of choosing either quads or in-lines. The same criteria were applied for the World Championships. In all events were declared as "open". Despite this, it had soon become evident that in-lines were predominantly quicker than quads on all surfaces and all tracks and to this end athletes opted for in-lines over quads, as is still the case today.
Indoor races are most common in the United States, which has a long tradition of racing on skates at rinks. The competitions are generally held at roller skating rinks with plastic-coated wood floors and, less commonly, a plastic coated cement floor. The track is about m in circumference. Events, or meets , are typically structured so that members of numerous age groups race in three or four distances. Richard K: You proved it's still possible to socialize and meet interesting people during the coronavirus pandemic. Thank you for organizing this event. Carol Y: Wow what fun!
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