An elderly Egyptian Masters swimmer gets ready to swim in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer is seen by a swimming pool in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

Elderly Egyptian Masters swimmers prepare to swim in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer gets ready to swim in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

Elderly Egyptian Masters swimmers talk to each other by a swimming pool in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer jumps into a swimming pool in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer swims in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer swims in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

Elderly Egyptian Masters swimmers swim in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer prepares by a swimming pool in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer warms up before swimming in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

Elderly Egyptian Masters swimmers are seen by a swimming pool in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)

An elderly Egyptian Masters swimmer swims in Alexandria, Egypt, on Oct. 31, 2019. Masters swimming, a fast-growing leisure activity, is a special class of competitive swimming for swimmers of 25 years and older. In Egypt, Masters swimming started since early 2000s, and it is spreading notably in recent years. (Xinhua/Ahmed Gomaa)