Thứ Bảy, 27 tháng 8, 2016

Why Swimming Is Good Exercise & Fun

Why Swimming Is Good Exercise & Fun
woman swimming underwater Photo Credit Maridav/iStock/Getty Images
Swimming makes people fitter and feel better. Cold weather limits the months when ocean or lake swimming is possible, but access to public indoor pools makes swimming and aquatic exercise available year round in colder climates. USA Swimming, the national governing body for swimming, says that the sport builds self-awareness and self-confidence in youth. Any adult swimmer knows that swimming is also healthy for mature athletes, and that water helps make them feel younger.

Aerobic Exercise

Swimming is an aerobic form of exercise, meaning that it involves all the major muscle groups in the body and that it improves cardiovascular health. Specifically, swimming helps increase blood circulation and can also increase lung capacity. As any form of aerobic exercise, swimming expends energy and burns calories. Although exercise on its own might not result in weight loss, swimming combined with a healthy reduced-calorie diet works well to lose weight gradually and permanently.

Mental Benefits

Young swimmers benefit from swimming in many ways. Gaining competence in as demanding sport such as swimming builds confidence, according to USA swimming, the national governing board for the sport. Because swimming is an individual sport that takes place in a group or team atmosphere, kids learn about competition and cooperation at the same time. Building a positive self-image and the discipline to control negative thoughts are skills coaches help foster. Once a swimmer has confidence in the water, they enjoy the feeling of freedom and release of moving fast in the weightless environment. Being in the water just feels good.

Adults Benefits

As any adult can attest, getting older means understanding gravity better. Swimming means being able to exercise free from the heaviness that seems to accompany age. On deck, the extra 10 lbs. put on over a few years literally weighs heavily on people. Jumping in the pool relieves aching ankles or overburdened joints. Because swimming is a non-weight bearing exercise, it is ideal for heavier people. The water supports them and helps keep them from overheating while they exercise.

Function of Fun

Swimming is good exercise, in part because it is fun. It provides a potentially excellent workout, yet it does not feel as grueling as sweating away on a stationary bicycle or pounding the pavement on a hot summer day. Swimmers attest to the joyous feeling of being buoyant in deep water, particularly outdoors, with blue skies above and scenery to distract the mind. The aqueous environment also serves to isolate and insulate the swimmer. Lap swimmers find freedom to think about their day, or problems they face. After a few hundred laps though, most forget about issues other than breathing, stroke control and technique. It is an effective mind-clearing workout, as detailed by coach and Masters swimmer Jennifer Parks in a May 2003 article for “Swimmer” magazine.

Considerations

Swimming is a good exercise for many different types of people, but sedentary adults should check with a doctor for any limitations or advice before starting upon an exercise routine. Some people suffer reactions when they swim in chemically treated pool water, according to Mary Pohlmann, assistant professor of clinical medicine at Southern Illinois University School of Medicine and USMS Sports Medicine Committee member. Common complaints include dry or itchy skin, irritated eyes and lung irritation. Cleaner, better-maintained pools usually result in fewer allergic reactions. Outdoor pools tend to have fewer problems from disinfection related side effects than do indoor pools, due in part to the better ventilation of open-air facilities.
Resource: livestrong.com

What Is a Seed Time in Swimming?

What Is a Seed Time in Swimming?
A swimmer is racing in a lap lane. Photo Credit Trepalio/iStock/Getty Images
Swimming officials use seed times to determine the most competitive match-ups. Seed times are so vital to a fair, efficient swim meet that they're required on most registration forms and nationally standardized on Official Verification Cards (OVC). Coaches usually handle recording and reporting seed times, but knowing how seed times work gives you a motivational advantage.

Definition

When a competing swimmer registers for an event at a swim meet, she submits a seed time. The seed time is the fastest time the swimmer obtained in the past for that particular event. This time determines who the swimmer competes against, which heat she'll compete in and which lane the officials assign to her. Some swimmers prefer to submit an average of their past times, while longer meets may use times from preliminary heats.

Standard Seeding

In most swim meets, swimmers with the slowest seed times compete in the first heat, and the following heats have swimmers with gradually increasing seed times. The swimmers with the fastest seed times compete against each other in the final heat of the event. A swimmer with the fastest seed time in his specific heat has the center lane, and the swimmers with the next two best seed times are to his right and left. Swimmers with the heat's slowest speed times have the outside lanes.

Circle Seeding

Meets with both a preliminary and a finals division -- usually taking place over two days or with a morning and afternoon competition -- may use circle seeding for the final heats. Instead of having the fastest seed times competing against each other in the same heat, the fastest seed time has the center lane in the last heat, the second-best time takes the center lane in the second-to-last heat and the third best time has the third-to-last heat's center lane. The next set of three best seed times take the lane to the center's right in each heat, respectively, the next three best times take the lane to the center's left in each heat, and so on.

Assignments

Meets are either deck seeded or pre-seeded. Pre-seeded meets have the participating swimmers assigned to their appropriate heats and lanes before the meet begins, while deck seeding takes place just before the heat, when the swimmers report to the meet's clerk. Deck seeding prevents empty lanes from absent or scratched swimmers but causes delays between heats.
Resource: livestrong.com

Crossover Kick Swimming Technique

Crossover Kick Swimming Technique
The crossover kick is best for endurance, freestyle races. Photo Credit Ryan McVay/Photodisc/Getty Images
Using both their arms and legs to propel them through the water, swimmers use cupped hands, rotating arms and strong, powerful legs to make a fast and energy-efficient freestyle stroke. In the case of distance swimmers, who need a powerful stroke that conserves energy, endurance is key to their ability to swim hundreds of meters in one go. The crossover kick is an alternative swimming technique for the freestyle stroke that helps save energy for endurance swimmers.

The Crossover Kick

The crossover kick is so named because the swimmer’s ankles cross during the kick. Sometimes the kick is also called the two-beat or the four-beat kick. Every downwards kick is considered one beat. The crossover kick uses major — larger — and minor — smaller — beats to complete a single crossover kicking cycle.

Benefits of the Crossover Kick

The crossover kick is helpful in saving energy for long- and medium-distance freestyle races. This kicking technique is not intended to propel as strongly as the sprinting flutter kick more commonly used in short distance freestyle events. The crossover kick relies more on arm movement to propel the swimmer through the water. However, the crossover kick helps the body rotate as needed to achieve greater propulsion in the arm strokes. The rotation of the body during the kick also helps with breathing.

The Details

The crossing part of the crossover kick occurs at your ankles. As your right arm descends into the water, cross your right leg over your left. Kick down with your right leg as your right arm pushes through the water. During your right arm’s upsweep and your left arm’s descent, cross your left leg over your right. Kick down with your left leg as your left arm pushes through the water. This is one complete crossover kick cycle.

Body Type and Suitability

Mastering the crossover kick is easier for some swimmers than others. Long- or medium-distance swimmers with equal body lines — equal strength and symmetry on both sides of their body — are better suited for the mechanics of the crossover kick. In general, swimmers who do a two-beat crossover kick have longer legs than freestyle swimmers who use a more traditional kick.
Resource: livestrong.com