Brie Larson shows off the muscles she gaining in nine months of training with a video of her pull-up abilities Julie Mazziotta ... and prior to joining PEOPLE worked at Health Magazine.

Back strength is crucial to mastering pull-ups, so you’ll want to strengthen several target muscles ... You can also use an assisted pull-up machine, often available in gyms.

What muscles does the close grip lat pulldown target? The primary muscles worked by ... can use a cable machine to perform ...

The motions in a rowing machine workout include: Pushing yourself backward with your legs. Using your core to lean your body backwards. Using your arms to pull the ... the core muscles in your ...