The move I love to hate: Boxer Marlen Esparza's 'punch-outs'

Natalie Gingerich Mackenzie

After winning the Olympic bronze medal in 2012 and the world title in 2014 in flyweight, Marlen Esparza went pro earlier this year. As she preps for her next fight, she turns to this move to help her keep endurance up throughout each bout. Read more ...

The move I love to hate: Amanda McGrory's stair climb -- on her hands

Natalie Gingerich Mackenzie

Wheelchair racer Amanda McGrory, the American record-holder in the marathon, needs to build her upper-body strength to the point where she can race 26.2 miles in a little over an hour and a half. So she turns to this move, dubbed "The Stairway to Hell." Read more ...