What is Ventilatory Threshold?

Introduction In kinesiology, the ventilatory threshold (VT1) refers to the point during exercise at which the volume of air breathed out (expiratory ventilation) starts to increase at an exponentially greater rate than VO2 (breath-by-breath volume of oxygen (O2)). VT1 is thought to reflect a person’s anaerobic threshold – the point at which the oxygen supplied… Read More

A Brief Overview of Phosphocreatine

Introduction Phosphocreatine, also known as creatine phosphate (CP) or PCr (Pcr), is a phosphorylated form of creatine that serves as a rapidly mobilisable reserve of high-energy phosphates in skeletal muscle, myocardium and the brain to recycle adenosine triphosphate (ATP), the energy currency of the cell. Brief History The discovery of phosphocreatine was reported by Grace… Read More

An Overview of Lactate Threshold

Introduction Lactate inflection point (LIP) is the exercise intensity at which the blood concentration of lactate and/or lactic acid begins to increase rapidly. It is often expressed as 85% of maximum heart rate or 75% of maximum oxygen intake. When exercising at or below the lactate threshold, any lactate produced by the muscles is removed… Read More

What is Exercise-Associated Muscle Cramp?

Introduction Exercise-associated muscle cramps (EAMC) are defined as cramping (painful muscle spasms) during or immediately following exercise. Muscle cramps during exercise are very common, even in elite athletes. EAMC are a common condition that occurs during or after exercise, often during endurance events such as a triathlon or marathon. Although EAMC are extremely common among… Read More

What is Exercise-Associated Hyponatremia?

Introduction Exercise-associated hyponatremia (EAH) is a fluid-electrolyte disorder caused by a decrease in sodium levels (hyponatremia) during or up to 24 hours after prolonged physical activity. This disorder can develop when marathon runners or endurance event athletes drink more fluid, usually water or sports drinks, than their kidneys can excrete. This excess water can severely… Read More

Exercise-Induced…

This is a collation page for exercise-induced… articles.

What is Exercise-Induced Hypoxemia?

Introduction Hypoxemia is an abnormally low level of oxygen in the blood. More specifically, it is oxygen deficiency in arterial blood. Hypoxemia is usually caused by pulmonary disease. Sometimes the concentration of oxygen in the air is decreased leading to hypoxemia. Brief History The term hypoxemia was originally used to describe low blood oxygen occurring… Read More