4 tips to build muscle at the gym from one of the world's most decorated Olympians

Katie Ledecky of Team United States reacts after winning gold and setting a new championship record time of 8:05:62 in the Women's 800m Freestyle Final on day 23 of the Singapore 2025 World Aquatics Championships at World Aquatics Championships Arena on August 02, 2025 in Singapore.

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• Swimmer Katie Ledecky is a world-record holder with more than a dozen Olympic medals.
• She said her training routine focuses on consistency and explosive power with weights and circuits.