Question

Before a marathon, runners often eat carbohydrates such as pasta or potatoes because the body converts these foods into glucose, a sugar that provides energy," why do runners consume carbohydrates before a marathon?

a) Because carbohydrates taste good
b) To reduce their appetite
c) To provide energy by converting carbohydrates into glucose
d) To increase their body weight

Answer 1

Runners consume carbohydrates before a marathon as these are converted into glucose and glycogen, which provide a readily available energy source to sustain the high demands of endurance running.So, correct option is (c).

Step-by-step explanation:

Runners consume carbohydrates before a marathon to provide energy by converting carbohydrates into glucose. This is because carbohydrates, particularly polysaccharides like those found in pasta and potatoes, are excellent sources of energy for endurance activities.

When consumed, carbohydrates are broken down into glucose, which is then used directly for biochemical energy or stored in the liver and muscle tissue as glycogen. This glycogen acts as an energy reserve and can be quickly mobilized during the marathon to meet the body's demand for glucose, ensuring that the muscles have enough energy to sustain the effort required for the lengthy run.

Moreover, since carbohydrates are digested relatively easily, this energy can be accessed more quickly compared to other food components like fats or proteins, hence facilitating a high level of performance in athletes. It is essential for athletes to 'carb-load' prior to competitions so that they can compete at their best ability.