If you've ever wondered about the level of stress felt by Olympic athletes in the heat of competition, look to Olympic silver medalist Jake Kaminski.
The archer, who trains along with teammates at the Chula Vista Olympic Training Center near San Diego, shared his heart rate graphs with his Instagram followers Wednesday.
"This is the first major event I have worn this to," he said.
Kaminski said he takes the information and incorporates it into his training for his next big competition.
"It's a neat way to track how you feel against actual systemic functions and make adjustments in your training or mental focus to help adjust for the next time."
Click on the message to read Kaminski's description of the different graphs.