The findings of a new study that looked at the heart of a swimmer vs. the heart of a runner underscored how sensitive our bodies are to different types of exercise

The findings of a new study that looked at the heart of a swimmer vs. the heart of a runner underscored how sensitive our bodies are to different types of exercise https://t.co/3pzTJpbRHB

— The New York Times (@nytimes) April 5, 2019