Shayna Jack is from Queensland, Australia. She is a sprint freestyler and holds World Records in several relays. She served a doping suspension for testing positive for Ligandrol, also known as selective androgen receptor modulator (SARM) LGD-4033.
2015 FINA World Junior Swimming Championships
Jack represented Australia swimming the 30m, 100m and 200m freestyles. Jack finished third in the 50m free with a final time of 25.54. Jack finished fifth in the 100m Freestyle with a 55.38, just 0.6 seconds out of medal contention. Clocking a 2:03.13, Jack also swam the 200m freestyle.
2017 Australian National Swimming Championships
Jack, who trains with Bronte and Cate Campbell, took down Bronte’s national 18-years record twice on Sunday. In the morning heats, Jack clocked a 53.60 to make the finals. In the finals she placed fourth, securing a place on Australia’s World Championship Team and broke the record again, lowering it to 53.40.
2017 World Championships
Jack swam the leadoff leg on Australia’s silver medal winning 4x100m freestyle relay splitting a 53.75. Teaming with Bronte Campbell, Brittany Elmslie and Emma McKeon, the Aussies beat bronze medal winners, the Netherlands, by 0.63 seconds.
2018 Pan Pacific Championships
On day 2, Shayna swam the 100 free, qualifying 5th in prelims, but fell to 7th (53.74) in finals. On day 3, Jack went 2nd on the women’s 4×100 free relay, splitting 53.10 to help the Aussie’s secure gold in a pan pac record of 3:31.58.
ISL – Cali Condors
On June 11, 2019, Shayna Jack was announced as a member of the Cali Condors ISL team, headed by GM Jason Lezak
2019 World Championships
June 14, five weeks prior to the start of FINA World Aquatics Championships, Aussie freestyle ace Shayna Jack announced her withdrawal from the world’s biggest swimming competition outside of the Olympics. Jack stated via her social media,”It is with great sadness that I have to withdraw from world championships due to personal reasons.” With the ambiguity arose questions and speculation, which were confirmed. The 2017 World Championships medalist tested positive for a banned substance. Via Instagram, Jack revealed she has tested positive, but says, “I would never intentionally take a banned substance that would disrespect my sport and jeopardize my career.” The St. Peters Western athlete stated further, “Now there is an ongoing investigation and my team and I are doing everything we can to find out when ad how the substance has come into contact with my body.”
July 28th Jack revealed on her Instagram account that the banned substance Ligandrol was found in both her A and B samples. Ligandrol, also known as selective androgen receptor modulator (SARM) LGD-4033, was originally developed for the treatment of muscle wasting conditions such as ageing, osteoporosis, muscular dystrophy and cancer, is promoted as a selective non-steroidal anabolic agent. (Australian Sports Anti-Doping Authority).
2023 World Aquatics Championships (Fukuoka, Japan)
Jack missed out on qualifying for the 100 free at Aussie Trials so she was relegated to relay duties and the 50 free. She made the most of an unfortunate situation by posting a world-leading 52.28 on the prelims 400 free relay. On the finals relay, she split 51.69 on the 2nd leg after O’callaghan’s 52.02 and helped Meg Harris (52.29), and Emma McKeon (51.90) combined for a 3:27.96 to obliterate the world record of 3:29.69 the Aussies set in 2021 by 1.73 seconds.
On the mixed 400 Medley relay, she had an absurd 51.66 split to anchor the prelims squad and earn a finals berth. She made the most of it and was even faster with a 51.53 to net silver for the green and gold. Jack helped Australia to another gold medal and world record with a 1:55.63 split on the 800 free relay.
In her sole individual event, Jack was great in the 50 free prelims with a 24.02 PB for 2nd. She was even better in semis with a 24.01. In the final, Jack took silver in 24.10. The day before, she had helped the Aussies with a swift 51.73 split as she broke the mixed 400 free relay alongside Jack Cartwright (48.14), Kyle Chalmers (47.25), and Mollie O’Callaghan (51.71).