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Muscles are responsible for moving our bodies, generating movement through contraction. Muscles can be built up through exercise, which makes use of their ability to repair themselves when damaged. However, as we age, the biological processes that turn exercise into muscle become less effective, and our muscles don't respond to exercise in the same way.
| Characteristics | Values |
|---|---|
| How muscles move the body | By contracting |
| How muscles generate movement | By using energy from food |
| How muscles change with exercise | They increase in strength and size, a process called hypertrophy |
| How muscles change with age | They get weaker, even with exercise |
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What You'll Learn
Muscles and ageing
Muscles are responsible for moving our bodies. They contract to generate movement, and they need energy from our food to do this. Muscles also perform many more processes that we cannot actively control, such as keeping our hearts pumping and moving food through our guts.
Muscles change and get weaker with age, even when you work out. This is because the biological processes that turn exercise into muscle become less effective. As we age, our muscles don't respond to exercise in the same way.
However, old and young people build muscle in the same way. When you do strength training, exercises that initially felt difficult become easier as your muscles increase in strength and size – a process called hypertrophy. Bigger muscles have larger muscle fibres and cells, which allow you to lift heavier weights.
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Muscles and strength training
Muscles are responsible for moving our bodies. They do this by contracting, which generates movement. Muscles use energy from our food to produce movement. They also need signals from our brains to contract and move.
When we do strength training, exercises that initially felt difficult become easier as our muscles increase in strength and size. This process is called hypertrophy. Bigger muscles have larger muscle fibres and cells, which allow us to lift heavier weights. As we continue to work out, we can increase the difficulty or weight of the exercises as our muscles get bigger and stronger.
Old and young people build muscle in the same way. However, as we age, many of the biological processes that turn exercise into muscle become less effective. This is why we rarely see competitors over the age of 40 at the Olympics and almost never see a single athlete over 50.
To build new muscles through exercise, we can take advantage of our muscles' ability to repair themselves when damaged.
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Muscles and movement
Muscles are responsible for moving our bodies. They do this by contracting, which generates movement. Muscles use energy from our food to produce movement. They allow us to consciously move our limbs, jump in the air, and chew our food. But they are also responsible for many more processes that we cannot actively control, such as keeping our hearts pumping, moving food through our guts, and even making us blush.
To build new muscles through exercise, we make use of their remarkable ability to repair themselves when damaged. When you do strength training, over time, exercises that at first felt difficult become easier as your muscles increase in strength and size — a process called hypertrophy. Bigger muscles simply have larger muscle fibres and cells, and this allows you to lift heavier weights. As you keep working out, you can continue to increase the difficulty or weight of the exercises as your muscles get bigger and stronger.
However, as we age, many of the biological processes that turn exercise into muscle become less effective. This is why we rarely see athletes over the age of 40 at the Olympics and other professional sporting events. Our muscles don't respond to exercise in the same way as we get older.
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Muscles and energy
When we exercise, we can increase the strength and size of our muscles through a process called hypertrophy. Bigger muscles have larger muscle fibres and cells, which allow us to lift heavier weights. However, as we age, the biological processes that turn exercise into muscle become less effective, and our muscles don't respond to exercise in the same way. This is why older adults may find it more challenging to build muscle and maintain their strength, even with regular exercise.
To build new muscles through exercise, we can take advantage of our muscles' ability to repair themselves when damaged. This repair process requires energy and is an important aspect of muscle growth and maintenance.
Additionally, muscles are responsible for many processes in our bodies that we cannot actively control, such as keeping our hearts pumping, moving food through our digestive system, and even making us blush. These involuntary processes also rely on the energy produced by our muscles.
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Muscles and repair
Muscles are responsible for moving our bodies. They contract, which generates movement. This process is called 'contraction'. Muscles also need signals from our brains and energy from our food to contract and move. They are responsible for many processes that we cannot actively control, such as keeping our hearts pumping, moving food through our guts, and even making us blush.
Muscles can repair themselves when damaged. This is how we are able to build new muscles through exercise. When we do strength training, exercises that initially felt difficult become easier as our muscles increase in strength and size. This process is called hypertrophy. Bigger muscles have larger muscle fibres and cells, which allow us to lift heavier weights. As we keep working out, we can increase the difficulty or weight of the exercises as our muscles get bigger and stronger.
However, as we age, many of the biological processes that turn exercise into muscle become less effective. Our bodies age and our muscles don't respond to exercise in the same way. Older adults can still build muscle in the same way as younger people, but the underlying biological mechanisms that cause muscles to increase in size and strength after resistance or strength training are not as effective.
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Frequently asked questions
Muscles change with age, even when you work out. As you get older, the biological processes that turn exercise into muscle become less effective, and your muscles don't respond to exercise in the same way.
When you do strength training, exercises that initially felt difficult become easier as your muscles increase in strength and size. This process is called hypertrophy.
Muscles move our bodies by contracting, which generates movement. This process is called a contraction.
Muscles are responsible for many processes that we cannot actively control, such as keeping our hearts pumping, moving food through our guts, and even making us blush.
