Answer:
Resistance
Explanation:
Resistance is the opposite force that acts against the work done. Resistance in muscle exercise refers to the exercise in which the muscle moves against the resistance provided by the gravity and external force like the dumbbells, bars and weight.
This external exercise puts the Resistance on the muscle and when the muscle tries to move against the resistance puts pressure on the muscle and the exercise becomes hard. As a result of this, the endurance and strength of the muscle increases and nowadays is used as fitness exercise in the gym and professional bodybuilders.
Thus, Resistance is the correct answer.
Age doesnt nessecerily have a huge factor on how much some one can lift. The factors that you should be focused on are the size of the 14 year old, does it hurt to lift it, how many reps is he/she doing. Ive seen 14 year olds that are really meaty and buff and ive seen some who dont really have strenth to them.
Answer: The Generalised Slowing Hypothesis Theory
Explanation:
The Generalised Slowing Hypothesis is built upon wide observations in many studies of age related slowing and suggests that it is the primary contributor to the declines in cognitive functioning seen with aging.
As people age, B lymphocytes and T lymphocytes become less active. These cells secrete antibodies and are thus crucial to the immune system. T cells are made in the thymus which shrinks as aging occurs. Thus reducing the body's ability to fight infections as aging occurs.
Through the normal aging process, DNA is damaged by environmental factors such as pollutants and toxic agents. As a result, there is deletions of genetic material and mutations in DNA replicated in new cells. Reduced functioning in cells and tissues occur when these errors accumulate.
Also as aging occurs, glucose molecules attach themselves to proteins and form cross links. These crosslinks reduce the flexibility of tissues making them become stiff. The circulatory systems becomes less efficient since the tissues of the lungs, heart and arteries lose flexibility.
