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

Options

A. ATP
B. Glycolate
C. Lactate
D. Ethyl alcohol

Answer

To solve the question about what accumulates in the leg muscles during a hurdle race, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Context**: In a hurdle race, athletes require a significant amount of energy quickly due to the high intensity of the activity.

2. **Energy Production Mechanism**: The body generates energy through a process called glycolysis, which breaks down glucose to produce energy. This process occurs in the absence of sufficient oxygen, which is typical during intense physical activity.

3. **Glycolysis Process**: During glycolysis, glucose is converted into pyruvate. This is the first step in energy production when oxygen is available.

4. **Oxygen Limitation**: In high-intensity activities like a hurdle race, the demand for energy can exceed the oxygen supply. When oxygen is limited, pyruvate cannot enter the aerobic respiration pathway.

5. **Conversion to Lactate**: Instead of being fully oxidized in the presence of oxygen, the pyruvate is converted into lactate (lactic acid) when oxygen levels are low. This conversion allows for continued energy production even when oxygen is scarce.

6. **Accumulation of Lactate**: As the race continues and energy demands remain high, lactate accumulates in the leg muscles, leading to fatigue and discomfort.

7. **Conclusion**: Therefore, the substance that accumulates in the leg muscles during a hurdle race is lactate.

### Final Answer:
Lactate is accumulated in the leg muscles during a hurdle race.

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