Budapest - Hungary's 'Iron Lady' Katinka Hosszu admitted feeling the strain after retaining the women's 400m individual medley title at the world championships on Sunday to complete the IM double on home soil in Budapest.
Hosszu clocked a new championships record time of four minutes, 29.33 seconds with Spain's Mireia Belmonte taking silver at 2.84 and Sydney Pickrem of Canada earning bronze at 3.55.
This is the third straight world championships where Hosszu has won both the 200m and 400m IM title and she is also the world-record holder in both events.
However, and despite her nickname, Hosszu looked exhausted when she touched the wall and composed herself before celebrating in front of her home crowd at the Duna Arena.
She admitted her punishing schedule, racing in the 200m and 400m IMs, 100m and 200M backstroke, the 200m freestyle and 200m butterfly, had taken a toll, but the crowd carried her.
"It's been a hard week for me," the 28-year-old admitted after her victory.
"Of course, the Olympics schedule is different -- the 400IM is on the first day there.
"I swam 4.26 in Rio and 4.29 here, I thought that I was in even better shape this year, but because it was on the last day it was difficult to swim a best time.
"In the last 100, I've definitely heard the crowd. They pulled me, I wasn't just swimming for myself I was swimming for everybody here.
"I knew I would have a really busy schedule and that on the last day, I would have this hard program.
"I was trying to recover between races as much as I could. It was just amazing for me today, I have to take a moment to enjoy the whole experience."
Hosszu says she is looking forward to defending her 200m and 400m IM Olympic titles in 2020.
"Tokyo is in my mind, I'm very excited about it," she said.
"Now I feel free, I have all the titles, I have all the records. I just enjoy swimming I really love the sport.
"I do feel the motivation in me to keep going, I'd love to challenge for Tokyo as well."