How much cardio exercise you do depends on your current fitness level, exercise history, current health status, and goals. For general health benefits you should perform 30 minutes of cardio activity, 5-7 days of the week. Any activity that increases your heart rate and breathing rate can be considered cardio exercise. If you find that 30 minutes is a little too challenging, start with 5-10 minutes and gradually work up to 30 minutes.
Symptoms & Signs. Hairy tongue, medically known as lingua villosa, is generally a harmless condition that alters the appearance of the tongue, making it appear discolored and furry. Hairy tongue is also commonly referred to as black hairy tongue (lingua villosa nigra), but the tongue discoloration may appear white, brown, pink, or green. The color of the tongue depends both on the underlying condition plus the presence of any additional factors, such as the type of food consumed.
A black hairy tongue is caused by too much bacteria or yeast growth in the mouth: the bacteria build up on tiny rounded projections called papillae. These lie along the surface of the tongue. Instead of shedding as they normally do, the papillae start to grow and lengthen, creating hair-like projections.ertain lifestyle habits and conditions can make people more likely to develop black hairy tongue. They include: 1  Poor oral hygiene. 2  Smoking tobacco. 3  Drinking a lot of tea or coffee. 4  Using antibiotics (which may disrupt the normal balance of bacteria in the mouth). 5  Being dehydrated.