Acidic and alkaline water, pH all water and all aqueous solutions contain both H+ and OHâ ions. If the quantity of H+ exceeds that of the OH-, the water is said to be acidic. If there are more OH-ions than H+, the water is alkaline. Pure water, which contains equal numbers of both ions, is said to be neutral. Chemists express the degree of acidity or alkalinity on the pH scale which runs from about 0 to 14. Acidic solutions have pH values of less than 7, alkaline solutions more than 7.
Examples of aerobic exercises include marathon running, long-distance cycling and walking. Even meditative exercises, such as yoga and tai chi, can be called aerobic because aerobic respiration is still the dominant energy system your body uses, even if the intensity is much lower than running.
aerobic exercise is a type of physical activity that uses your large muscle groups is rhythmic in nature and can be sustained for at least 10 minutes walking jogging indoor cycling and aerobic dancing are all examples of aerobic exercise that strengthens your heart and lungs and keeps you healthyf you re performing this last activity then you re engaging in aerobic exercise aerobic exercise is any physical activity that makes you sweat causes you to breathe harder and gets your heart beating faster than at rest