[1] Moses began swimming in Coconut Island, then was trained by Hawaii Hall of Fame Coach George Center at the Outrigger Canoe Club in Honolulu beginning in 1919.

Moses placed first in springboard diving and broke the island plunge record three times with a final distance of 54 feet, 10.5 inches.

She was the only woman chosen to be part of the Hawaiian contingent for the 1920 Olympic swimming trials in San Francisco, California.

[7] During her swimming career she won top honors in the annual Thurston Meet in 1922, as the open champion and team captain.

[5] In 1920 Helen received a life membership in the Outrigger Club as an honor, perhaps partly in tribute to selection as an Olympic candidate.