"You need a certain amount of pressure but I just want to go into the meet and improve my times."
She will compete again in the 400m IM, plus the 100m freestyle, 100m and 200m fly and the 200m IM at the National Aquatic Centre in Bukit Jalil. She is likely to be involved in three relays (4x100m and 4x200m free; and 4x100m medley), bringing her tally to eight events, a huge jump from 2015.
To improve her stamina, national training centre head coach Gary Tan has placed her in the middle distance - and not the sprinters - training group. The former cover about 8km during each of the 10 weekly sessions. The latter do about 5km.
She said: "I do a lot more mileage and I feel like my sprints are a lot better than six months ago."
Tan, who has worked with the three Quahs for years, said Jing Wen has become more goal-orientated. He added: "She takes things more seriously now and knows what she wants to accomplish for each session. There's steel to her."
At the National Championships, Jing Wen raced against Ting Wen in the 200m fly final and, for the first time in a competitive race, she touched the wall first.
She played it down and said her 24-year-old sister had raced in another event earlier that evening. Yet the implications are clear; the younger sibling is getting faster.
She refrained from gold-medal predictions for the Games but said: "It would be nice to win a medal in each of my events. If I can hit five PBs in my five events, I'll be pretty happy with that."
Like Ting Wen (University of California, Los Angeles) and 20-year-old Zheng Wen (University of California, Berkeley), she will head to the United States to study and train, joining Texas A&M University after the Games.
The siblings' paths may be similar but Jing Wen wants to forge her own career. She said: "I used to measure my times with my sister's when she was the same age. But nowadays I don't. At some point you have to judge yourself against the rest of the world... That's where I want to have an impact."
Young and restless, this Quah cannot wait to make her own headlines.
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