Spring! Train on a fresh air! You can do a full workout for the back outdoors, if you are able to find bars! This particular exercise, the pull-ups with a wide grip, is focusing latissimus dorsi, an utter (side) part of your back. This muscle is visible from the front, en-face, side. It adds wideness to your body shape and usually is a subject of a high importance in bodybuilding competitions. Md @daniicremers
Technique, as I do it. First, position. The correct position of arms is wide, a good practice is the 90° in elbow in the middle position. But it is rather a matter of personal choice, the way how you feel the muscle better involved. The most important advice would be to try pull ONLY with your back and relax biceps and forearms as much as possible in this situation. The lower back flexion(chest forward, butt back) might help to find a correct position, where lat is involved on maximum. Next, the movement. a A solid powerful and continuous movement up, and a slower on the way down (don't drop like a bag in the negative phase). You want to stretch your muscles in the negative phase and make a tiny delay in the lowest point. You don't really need to throw your jaw over the bar, just get this feel, that in the peak point, your back is tight and muscles are shortened on max. Performance. Do 3-4 sets within 12-8 reps. It might be hard exercise for the beginner, so you can use rubber band or a special machine with counterweight. However I would not recommend using a machine, it does not teach how to work with your own weight and balance (knees are fixated on a pillow). So pretty often people can do a lot reps on this machine, and just a few on bars.
So here is a good hint for starting on bars. Bring a step platform with you. Make few reps. When you feel you cant lift yourself anymore, step on it (or jump up if you don't have one), get in the top position and slowly release your body using your back muscles. The negative phase works just as good as a positive movement up!!! Heeey, good luck, hope it was some of the use for ya! - 41 minutes ago