Answer (1 of 2): Lats and rhomboids as well as the back pair of deltoids. In visual terms, lats are the cobra hood flared out, the rhomboids are the backstrap [the long cylindrical vertical muscles running mid spine and the rear delts are the back of the cannonballs that make up the roundedness o
Where are your biggest and strongest muscles found? - Quora
What types of workouts are best for building muscle? - Quora
How to strengthen my back muscles - Quora
Which muscles do upright row targets? - Quora
Are barbell upright rows a poor exercise and a recipe for injury? Why or why not? - Quora
What muscles do kettlebell upright rows work? - Quora
Upright Rows
Which do you prefer for back workouts, barbell rows or pull ups? - Quora
What are the best trap workouts? - Quora, melhores traps
Are upright rows a dangerous exercise? - Quora
What would be a good workout for building muscle mass? - Quora
Which muscles do the bend-over rows work? - Quora
Which muscles do the bend-over rows work? - Quora
Are walking lunges a good exercise for building the quads? - Quora
What Muscle Is Developed Doing the Barbell Upright Row? : Full Fitness Training