Cardiovascular and Perceptual Responses to an Ultraendurance Channel Swim: A Case Study Mostly you know the swimming in the English Channel between England and France if you think of canal swimming. But there is also the ‘Catalina Channel’ in California, where a comparable channel swimming takes place.An American group has accompanied a swimmer over the 32.2 km and studied heart rate, water temperature, air temperature, speed and contemporary.
Although the effort became increasingly strong, the speed was constant. All interesting numbers can be read below https://pubmed.ncbi.nlm.nih.gov/25819111/