If we’re looking for a great upper-body workout, we usually expect that we’ll need dumbbells, resistance bands, or kettlebells. But we have some awesome news: You don’t need any equipment for this 20-minute workout that seriously strengthens your arms, shoulders, and back. Follow along as Jaime McFaden, a personal trainer at Grokker, shares the best bodyweight exercises for defined arms and shoulders. You’ll do push-ups, dips, planks, and even animal-inspired moves like “bird dog” and “bear crawl” to work your muscles to the max. The circuit ends with a relaxing cool-down stretch and will leave you feeling stronger and more energized by the end. Ready? Just press play. To read more click here!