Experiencing extreme pain, dizziness, and nausea during a cold water swim, with arms and legs feeling like lead, indicates a significant physiological challenge.

“and then I look and I've actually swam off course a bit and I've started swimming toward where the couple of the camera guys and they're like the buoy that way go that way so I head down again and the whole time I'm just like nah get out get out get out get out and then I have another voice in my head have Ross's voice there saying come on fight fight dig in and I just started going for it but what starts to happen is your arms and legs are just like lead balloons nothing works and I I didn't even you know I felt like I was swimming like this a little chicken and you can't keep your fingers together so your fingers start to spay you can't hold the water and it's just like it was nly um and then I got to the buy and they're all cheering and stuff and you know Darren said I was waiting for a big celebration I was like I couldn't move I was I was going to die”