The body is an
amazing object; the more you ask of it, the more it can do. If you are
inactive
most of the time, your body will quickly become tired when it should be
active. But if you are active many times each day or week, your body
will
get used to the hard work and it will become easier to do. Children who want to play active games with their friends should
exercise regularly so they have the energy to play as long as they want.
Many young people want to be
physically active because it helps them look and feel good.
Activity burns more calories than just sitting , so it is important for keeping a healthy
weight .
Exercise also makes your
muscles and
bones stronger and keeps your body in a good
condition .
Physical activity also helps people stay healthy.
Exercise strengthens the
immune system , and helps the body fight off
illness . Daily
exercise also helps people sleep better. Active students don’t
complain about being tired. They have a good night’s sleep and have the energy to work hard and have fun every day.
Strength
Strength is the
force that
muscles
use. People used to think only boys could be strong, but that is not
true. All people who want to be active and healthy must be strong.
Strength training keeps your bones strong. People who are strong can do activities more easily and may learn sport
skills more quickly.
Being strong does not always mean that you have big
muscles . Muscle
size is often
determined by your genes-very few people will look like bodybuilders when they get stronger. Age also helps find out
muscle size. Children of
elementary
school age will become stronger by doing exercises, but their muscles
probably will not grow much bigger . Boys may get bigger muscles if they
do
strength training because their hormones may
rise . Girls can also become stronger but they won’t get bigger muscles because their
balance of hormones is different from that of
males .
Making Muscles Stronger
To
strengthen your
muscles , you must make them work harder than usual. Lifting
weights in a
gym is not the only way to
increase strength . You can build strength just by helping to do things at home like lifting or bringing
grocery bags from the car to the kitchen.
To
increase strength , try moving a heavier object than normal. This could be a heavier
weight or a heavier
grocery bag . After a while it will be easy to move this heavier object. Anytime an object becomes easy for you to move, you must
increase the
weight again if you want to continue to get stronger. Remember, it takes time to become strong. But you should
increase weights slowly,
otherwise your
muscles may get hurt.
Exercises like
push-ups and
sit-ups will also build
strength . When you do these exercises, you move the
weight of your own body.
Although you cannot
increase your own weight, you can continue to build
strength by always doing more
sit-ups or
push-ups .
You must also do the right exercises. Lifting
weights with your arms will not make your leg
muscles stronger. If you want stronger legs, you must do leg exercises. For the best fitness, it is a good idea to work on
strengthening all your
muscles by doing many different exercises.
Aerobic Fitness
The lungs bring
oxygen to the
blood, and the
heart pumps the blood through
blood vessels to the
muscles .
Cardiovascular fitness is the body’s
ability to bring
oxygen to the muscles for a longer time. The more
oxygen you can bring to your
muscles , the longer you will be able to
exercise without becoming tired.
Cardiovascular fitness is also called
aerobic fitness.
Perhaps you have done
aerobic activities, such as biking or running, that make you
breathe faster and harder. You
breathe harder because your body is trying to take more
oxygen from the air and bring it to your
muscles . The more work you do, the more
oxygen you need.
Regular physical activity makes the heart, lungs, and
muscles become stronger and more
efficient .
Counting Your Pulse
Every time your heart
beats , it pushes blood through your
blood vessels . You can feel this beating or
pulse with your
fingertips . The best place to feel your pulse is near your
wrist . Place your
index and middle fingers at the beginning of your thumb on the inside of your
wrist . To find out your
heart rate , count your
pulse for six seconds and put a zero at the end of the number you counted. For example, if you counted nine
pulses (or heartbeats) in six seconds, your heart rate would be 90
beats per minute.
Compare your
heart rate when you are at rest with your
heart rate during or just after aerobic
exercise . It should be much faster then.
Feeling your pulse
Improving Your Aerobic Fitness
To keep healthy, everyone should try to be active for 30 minutes at least five days a week. But if you want to
improve your
aerobic fitness, you need to
exercise hard enough to
raise your
heart rate into the
target heart rate zone on at least three of those days. The
target heart rate zone is the level at which the heart and lungs become stronger most quickly. When
athletes train to
perform better in a
race , they try to keep their
heart rate in the
target heart rate zone for as long as possible.
This zone
depends on a lot of things like age,
weight and
sex . Generally if your pulse is between 125 and 170
beats per minute, your heart rate is in the
target heart rate zone . Try to keep your heart rate in that zone for at least 15 minutes. Slowly
increase the
amount of time you
maintain your heart rate in the target heart rate zone until you can do it for 30 minutes each time you exercise .
What Type of Activities Are Best for Aerobic Fitness?
Any activity that makes your heart
beat faster and that you
enjoy is a good type of
aerobic exercise. If you like
jumping rope or cycling, that is the activity you should do. You don’t have to do same thing every day. In fact, two days of
basketball, three days of swimming, and two days of bicycling can be more fun than jogging every day.
Flexibility
Joints are points in your body that allow you to move. Your body has many
joints , including the
shoulders , elbows,
wrists ,
hips , knees, and
ankles . A
joint that is healthy can move in all
directions very easily.
Why is this important? Your
muscles and
ligaments are important for
joint health.
Stretching activities are important to keep
joints healthy.
Flexibility slowly
decreases when people get older. By doing regular
stretching activities, you can help keep the
full range of
motion at each
joint .
If you watch athletes warm up, you will see that they all do
stretching activities before
competition . Stretching helps athletes
avoid injuries because it moves blood to the
muscles and prepares them for difficult activities.
Stretching after
exercise moves blood through the whole body and you don’t feel so much
pain in your muscles the next day.
Stretching can also help you feel
relaxed . If you are tired or
worried , try doing
flexibility activities and
deep breathing together. You may feel better and will keep your
joints healthy at the same time.
Flexibility Exercises
Flexibility exercises should be done with slow,
controlled movements
. You should move slowly until the muscle being stretched starts to
hurt a little. Hold this position for 10 to 20 seconds and then relax.
How to get started
People who have not been very active in the past should begin slowly. Do not try to
exercise too much at once. If you are normally active, you may want to try some new exercises.
Clothes
The right clothing will make exercise easier and more
enjoyable . A good pair of shoes gives
support to the feet during
exercise . Athletic shoes do not have to be expensive, but they should
fit well and be
comfortable . Make sure shoes are
tightly laced , and wear socks so that you won’t get
blisters .
You should choose clothing that is
suited to the type of activity and the temperature. If you are exercising in warm weather, wear
lightweight and light-colored clothing and a
cap or hat to
shade your head from the sun. If you are active in the cold, try wearing many
layers of clothing
instead
of a heavy coat. This keeps you warmer and lets you move more freely.
If it is raining outside or you will be playing in the snow, wear
clothing that is
water-resistant -once your clothes get wet, it is hard to stay warm.
It is also important to wear things that will
protect you. For example, you should always wear a
helmet when cycling.
Pads ,
mouth guards , or
protective eyewear might be necessary when taking part in other activities.
Soreness, Aches, and Pain
You may feel muscle
soreness for a few days after trying something new. This may mean the activity you did was too
strenuous or
involved muscles you do not use often. Muscle
soreness is normal and will usually go away in a few days.
Soreness is different from
pain . If you ever feel pain in a muscle or
joint , you should tell an adult or go to the doctor.
Sometimes you may
develop an ache on the side of your upper stomach during activity. Nobody knows exactly what
causes a
sideache .
Stretching the side that is hurting, taking
deep breaths , or putting
pressure on the
ache with your hand may help. At other times, you might have to rest for a few minutes until the ache goes away.
Selecting an Activity
There are many factors to look at when selecting a new
physical activity. The most important is choosing something you enjoy and will want to do often.
Everyone needs activities that help them keep or
improve their
strength ,
aerobic fitness, and
flexibility
. You may want to select an activity from an area in which you think
you need to become better. For example, if you are flexible and able to
run long distances but are not very strong, you could choose some activities that
increase strength. If you are strong but need more aerobic fitness, try walking, jogging, biking, or dancing.
Long-distance running
Different activities need different
skills . Your school years are an excellent time to
develop athletic skills. Some skills will
improve with practice while others may always be difficult for you. Some people are better at
certain activities than others, but do not let that
put you off. If you
enjoy an activity, feel free to do it.
You may need to try
several activities before
you find the ones that are right for you. For example, you may find you
enjoy activities you can do alone, like running or biking. Or you may
prefer to
participate in team activities. Some people like
competition , while others prefer activities in which there are no winners or losers.
Whatever activities you choose, becoming
physically fit will make you healthier for life.