In hurdle race, which of the following is accumulated in the leg muscle

Options

A. Performed ATP
B. Glycolysis
C. Lactate
D. Oxidative metabolism

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: In a hurdle race, athletes engage in intense physical activity that requires a lot of energy from their leg muscles.

2. **Energy Production in Muscles**: During such intense activities, the muscles require ATP (adenosine triphosphate) for energy. This ATP is primarily produced through aerobic respiration, which requires oxygen.

3. **Oxygen Availability**: In a high-intensity activity like a hurdle race, the demand for oxygen in the muscles exceeds the supply. This leads to a decrease in oxygen levels in the muscle tissues.

4. **Anaerobic Respiration**: When oxygen levels are low, the muscles switch from aerobic respiration to anaerobic respiration. This process does not require oxygen and primarily involves glycolysis.

5. **Glycolysis and Lactic Acid Formation**: During glycolysis, glucose is broken down to produce ATP. However, in the absence of sufficient oxygen, the pyruvate produced from glycolysis is converted into lactic acid instead of being processed further in the mitochondria.

6. **Accumulation of Lactic Acid**: As the race continues and muscle activity intensifies, lactic acid accumulates in the leg muscles. This accumulation can lead to muscle fatigue and pain.

7. **Conclusion**: Therefore, in a hurdle race, the substance that accumulates in the leg muscles due to anaerobic respiration is **lactic acid**.

**Final Answer**: Lactic acid.

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