1. What do muscles do?
They contract, resulting in movement. Muscles can only... Pull, not push.
2. What is a muscle cramp?
A muscle cramp is a painful spasm of the muscle. It is caused by a prolonged tightening of that muscle, leading to it being shortened. The spasm can last from a few seconds to 15 minutes. Muscle often feels hard and painful. Muscles in legs, are very common but small muscles of the feet are also sometimes affected. The muscle may remain tender for up to 24 hours after a leg cramp.
3.What is the cause for muscle cramp?
Cramp often occurs as a result of overusing your muscles. It is common in athletes, especially long distance runners, and tennis and football players. Cramp often happens after you have sweated a lot. It can also occur with repetitive movements, such as writing which is called ‘writer's cramp’. Night cramps occur when you sleep in an awkward position.
4.What is the treatment and prevention of muscle cramps?
You can relieve the pain of muscle cramp by stretching and gently massaging the muscle. Grasp your muscle with one hand and pull back on your toes with the other to point the toes upwards. This helps to relieve the spasm.
Regular calf stretching exercises will often prevent leg cramps. Drink plenty of fluid before, during and after exercising or playing sport, and make sure you warm up properly before you begin.
5. What is Stamina?
How long a muscle can work without getting tired
You increase the stamina by increasing muscle use.
6. What is muscle Fatigue?
Muscle fatigue is inability to contract forcefully after prolonged activity. This is due to ATP deficiency.
There is not enough acetyl choline from motor neuron to stimulate muscle.
7. what is muscular hypertrophy?
Hypertrophy is increase in the size of muscle mass. It requires very forceful muscular activity or moderate repetitive activity.
Length of muscle fibers is set at birth - cannot increase length of fibers, only size of fibers is increased.
Human growth hormone, testosterone - hormones that increase fiber size
8. What is muscular atrophy?
Atrophy is decrease in the size of muscle mass. There is degeneration and loss of muscle mass due to inactivity.
It is also called wasting. Muscles decrease in size due to loss of muscle fibres , ultimately results in decreased strength.
Disuse atrophy is a condition in which loss of muscle mass in bedridden patients and patients having plasters. |
