Exercise has immediate effects on the [b]respiratory system[/b] and the [b]circulatory system[/b].
[li]tidal volume (the volume of air breathed in or out in one breath)[/li]
[li]beats per minute (the contractions of the heart, per minute)[/li]
Aside from that they can also increase:
[li]the strength of the diaphragm and intercostal muscles[/li]
[li]vital capacity (volume of air that can be forcibly exhaled after inhaling fully)[/li]
Drugs are classified in 2 distinct ways:
The [b]depressants[/b] lower the beats per minute, as they depress, or weaken, the body's life support system, and can be fatal.
The [b]stimulants[/b] increase the beats per minute, and they can lead to heart attacks, which can result in death.