Answer:
When skeletal muscles are trained by adding physical stress to them, this is called progressive resistance training (PRT).
Explanation:
During PRT, muscles are exercised against an <em>overload or resistance</em>; the overload is gradually increased in order to allow muscles to adapt. This allows for progressive strength increases over time.
Muscle fatigue is defined as a reduction in the ability to produce force due to exercise. This comprises:
- peripheral fatigue- due to changes at the junction between motor neurons and the muscle.
- central fatigue- caused by a reduced capacity to use voluntary force in relation to the capacity to use involuntary force
- and muscle damage- this is associated with several issues at the cellular level such as disrupted membranes and cytoskeletons; and tissue damage via torn muscle fibers, and collagen.
Overall, these may affect muscle fiber activation and the amount of force they are capable of producing- i.e. sustained strength. However, muscle fatigue can be greatly reduced via the maintenance of PRT. Also, apart from strength gains, PRT is <em>used for weight loss and muscle building</em>; common tools used in PRT include <em>free weights, elastic bands and exercise machines. </em>
Answer:
Playing sports does not cause osteosarcoma
Explanation:
Osteosarcoma is a bone cancer that begins in the cells that forms bones.
Common symptoms of Osteosarcoma are; tumor that can be felt through the skin, bone pain, restriction in movement, limping and so on.
If the disease has not spread to other part of the body, the survival rate is around seventy -to seventy-five percent but if osteosarcoma has spread to other part of the body the survival rate is about thirty percent.
For treatment, chemotherapy and chemotherapy drug should be administered.
In some places that could b true