![How to Build a Stronger Upper Body Using Only a Jump Rope](https://ic-cdn.flipboard.com/insidehook.com/d7aa84854c705678abc910136232cc344a3190d1/_xlarge.jpeg)
Last year, we spoke to Michael Oladije, Jr., a retired professional boxer who’s now in the inner circle at Chris Hemsworth’s surging fitness empire, …
* View the article originally published here. ** More curations: Al Cannistra at San Antonio ONE here.