How to do proper classic pullups (pronation mode) ?

1. Stand under the pull-up bar and jump up to grab it with both hands, palms facing away from you and slightly wider than shoulder-width apart.
2. Hang from the bar with your arms straight, shoulders pulled down and back, and core engaged.
3. Begin the movement by pulling your shoulder blades down and back, and then bending your elbows to pull your chest up towards the bar.
4. Continue pulling until your chin is above the bar, keeping your elbows close to your body and your core engaged.
5. Hold the position for a second or two, then slowly lower yourself back down to the starting position with control, fully extending your arms.
6. Repeat for the desired number of repetitions, make sure to keep your body in a straight line throughout the movement, avoiding swinging or kipping to generate momentum.

How to do proper eccentric (or negative) pullups (pronation mode) ?

1. Start by standing on a box or bench that brings your chin above the bar.
2. Grab the bar with an overhand grip, with your palms facing away from you.
3. Slowly lower your body down towards the ground, taking about 5 seconds to complete the movement.
4. Once your arms are fully extended, step back onto the box or bench and repeat the movement for several repetitions.

By doing negative pull ups, you can build the necessary strength to eventually perform a full pull up.