Swimming is a classic summer pastime that can be both invigorating and relaxing. However, there are some who take their underwater efforts to the extreme. Just take Budimir Ĺ obat, for example. In March 2021, the Croatian freediver, who was 56 years old at the time, set a Guinness World Record after holding his breath for an incredible 24 minutes and 37.36 seconds. “While I am doing my maximum static apnea [a breath-holding technique], I have my eyes closed and all I am focused on is to try to hear my heartbeat,” the diver said. “Once I heard it, I became calm and ready to fight the time.”