Osnove vaje za dvig brade

Introduction

Chin Up is an exercise in which you hang your hands from a support and 

then pull yourself up until your chin is level with the support.

Most upper body exercises contribute to the pull-up. Lowering ligaments, 

rowing and bicep curls all help if the ultimate goal is to complete the pull-up with proper form.

Pull-ups are an example of a closed chain exercise.

Key Movements

The latissimus dorsi (psoas) is the most powerful pulling muscle in the back 

and is the primary mover during pull-ups.

Synergists

A range of powerful muscles in the upper and lower arms can help with this movement.

These muscles include

Biceps, brachialis and brachialis.

Some of the triceps also help stabilise the arm.

The infraspinatus, teres minor and teres major muscles also help your lats when doing pull-ups.

The lower trapezius muscles are involved in the movement and stabilisation 

of the shoulder blades when doing pull-ups.

The pectoralis major also activates when you pull yourself up and over the bar, 

but it is not nearly as useful as the other muscles (such as the vastus lateralis or biceps).

The external abdominal obliques and erector spinae serve to stabilise the torso during a pull-up. 

They are needed to stabilise the core of the body so that the body can be lifted as a solid structure.

Good Posture

Technique is key for all exercises.

Do the movements fluidly.

Arms should be straight at the start of each movement, but not in a dead hang.

Keep your hips and abdominals tight. This helps you stop swinging.

Do not do half movements. The set is over when you can no longer do the full movement.

Avoid extreme grips (super narrow or super wide). For pull-ups (palms facing you), 

try to empty a hand position on the inside of a shoulder-width grip. 

For pull-ups (palms away from you), try to empty one or two handholds on the outside of a shoulder-width grip.

Vary your grip to keep your joints healthy. Rotate between different grips (down grip, up grip, neutral grip) every few months. 

If a particular grip feels uncomfortable, don't do it.

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Chair-assisted Chin Up

Since pull-ups are an advanced exercise that not all weightlifters can do, there is a simpler version available to get started:

Position the chair to face you as you hang from the pull-up bar. Position the chair so that the front edge of the seat is almost directly in front of the bar.

Hold the pull-up bar (palms facing you) shoulder-width apart, then place one foot on the seat of the chair. Let the other leg hang down toward the floor.

Apply force with your foot as you pull yourself up. Provide only as much help as you need to complete the pull-up. Focus on pulling with your upper body, 

especially your back muscles.