98 questions and answers in this section
Explain why some athletes prefer to train early in the morning rather than late at night?

Explain why some athletes prefer to train early in the morning rather than late at night?

The human body has an internal clock called the circadian rhythm, which determines periods of alertness and rest. In the morning, typically between 6 a.m. and 9...

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Explain why are there Olympic rings at the Olympics?

Explain why are there Olympic rings at the Olympics?

It was Baron Pierre de Coubertin who conceived the Olympic rings in 1913. This symbol was first used at the Olympic Congress in 1914 and...

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Explain why do some athletes take performance-enhancing drugs?

Explain why do some athletes take performance-enhancing drugs?

Some athletes feel enormous pressure to succeed at all costs. In high-level sports, they are not only expected to participate but to win. Their coach, their team,...

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Explain why some athletes perform better in the rain?

Explain why some athletes perform better in the rain?

In the rain, some athletes benefit from a mechanical advantage, particularly thanks to an adapted stride. Running on a wet track naturally requires more precise...

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Explain why do some water sports ban the use of sunscreen?

Explain why do some water sports ban the use of sunscreen?

Most conventional sunscreens contain chemicals that are very harmful to marine life. Among them, oxybenzone and octinoxate are particularly toxic to coral reefs: they disrupt...

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Explain why do swimmers wear silicone caps?

Explain why do swimmers wear silicone caps?

Chlorine, quite useful for cleaning pool water, is unfortunately strong enough to damage your hair. Over time, it can make them dry, brittle, and dull. Wearing a...

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Explain why sailors use code flags to hoist?

Explain why sailors use code flags to hoist?

At sea, there is often wind, engine noises, and waves, making it difficult to be heard. Maritime flags (or code flags) provide a simple and...

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Explain why some symbiotic marine animals benefit from the protection of corals.

Explain why some symbiotic marine animals benefit from the protection of corals.

Marine animals, such as small fish or various shrimp, often maintain a close relationship with corals. This exchange, called symbiosis, is a true give-and-take: the...

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