Exposure to Cold

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來自 University of Florida 的課程

Science of Training Young Athletes Part 2

31 個評分

University of Florida

Science of Training Young Athletes Part 2

31 個評分

In this course you will learn how to design the type of training that takes advantage of the plastic nature of the athlete’s body so you mold the right phenotype for a sport. We explore ways the muscular system can be designed to generate higher force and power and the type of training needed to mold the athlete's physical capacity so it meets the energy and biochemical demands of the sport. We also examine the cost of plasticity when it is carried beyond the ability of the body to adjust itself to meet the imposed training stresses. The cost of overextending plasticity comes in the form injuries and chronic fatigue. In essence, a coach can push the athlete’s body too far and it can fail. Upon completion of this course you will be able to assemble a scientifically sound annual training plan.

從本節課中

Acute fatigue during training and competition

Fatigue is a phenomenon we all experience. It is characterized by tiredness and the desire to rest. Whether the athlete likes it or not, fatigue serves a protective function. It is both cognitive and physical in nature. In this topic you are introduced to the science of acute fatigue due to training and competition. With rest, acute fatigue dissipates and the body becomes stronger. You will learn about important fatigue theories, and the factors believed to contribute to fatigue such as low fuel supplies, acidity and body temperature.

Introduction5:55

Control Mechanisms5:10

Heat Adaptation3:38

Training Safely4:16

Exposure to Cold3:01

與講師見面

Dr. Chris Brooks
Instructor
Coaching Science Coordinator for USA Track and Field

Now, when the athlete is training in cold environmental conditions,

warm clothing and the physical exercise itself delays the core body cooling.

And when body temperature falls below 95 degrees Fahrenheit or

35 degrees Celsius, it is referred to as hypothermia.

And this means the thermal regulatory mechanism has trouble

keeping pace with the heat loss.

Symptoms include lack of coordination, mental confusion,

slowed reaction, and lack of energy.

And most of the problems faced by athletes in cold weather,

that you'll be dealing with, are usually numb hands due to reduced nerve activity.

And there is also reduced blood flow to the fingers due to

vasoconstriction of the blood vessels.

Numbness affects performance of skills such as throwing and catching.

And exposure of skin and underlying tissues on the nose, ears, cheeks,

and fingers, and toes may lead to frost bite, and your endurance runners,

if they're out running in cold weather, need to have a hat.

You can acclimate to cold as well.

Acclimation to cold usually begins after seven days.

Cold acclimated athletes maintain a higher hand and

foot temperature than those who are not acclimated.

Advise your athletes to wear multilayered clothing with adequate ventilation so

heat storage and sweating is minimized, and

change the clothing quickly after the end of training.

And water, such as sweat accumulation or rain, magnifies heat loss.

Cold weather clothing that is wind resistant with adequate ventilation

helps minimize the cooling effect of sweat accumulation.

A cold wind removes the layer of heat from around the body,

and for this reason, wind accelerates body cooling.

Now, long term breathing of cold air can increase

the respiratory passage secretions and decrease the mucus clearance.

And this potentially produces airway constriction.

It also impairs lung functioning.

And for many people, cold air also restrict the bronchioles.

And this stimulates a form of cold-air induced asthma.

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