Adenosine triphosphate (ATP) is the biochemical way to store and use energy. F or your muscles -- in fact, for every cell in your body -- the source of energy that keeps everything going is called ATP.
An approximate blood oxygen level can also be estimated using a pulse oximeter â a small device that clips on your finger. Though the pulse oximeter actually measures the saturation of oxygen in your blood, the results are often used as an estimate of blood oxygen levels.Normal pulse oximeter readings range from 95 to 100 percent, under most circumstances. Values under 90 percent are considered low.1  Causes.n approximate blood oxygen level can also be estimated using a pulse oximeter â a small device that clips on your finger. Though the pulse oximeter actually measures the saturation of oxygen in your blood, the results are often used as an estimate of blood oxygen levels.
1 Normal values for pulse rate depend on age and fitness level. 2  A normal adult has a pulse rate of 72 per minute and an athlete s pulse rate maybe below 50 per minute.3  Patients with an average resting pulse rate above 70 beats per minute can have a slightly higher incidence of heart attacks. Normal values for pulse rate depend on age and fitness level. 2  A normal adult has a pulse rate of 72 per minute and an athlete s pulse rate maybe below 50 per minute.