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Assisted Chin-Up

Muscular balance is needed between the upper and lower body to reduce muscular imbalances and injury risk. Exercises like the assisted chin-up are productive tools for enhancing upper body strength and promoting hypertrophy to reach fitness goals. 

Incorporate the assisted chin-up into your training routine to reap the benefits of improved posture, defined muscles, and increased strength. This guide details how to do the assisted chin-up and what muscles this exercise targets.

How To Do

  1. Locate an assisted pull-up machine.
  2. Lower the knee rest so that it is in place for the exercise.
  3. Set the weight for assistance to an appropriate weight for your fitness level and goals.
  4. Use the foot bars to move up onto the knee rest. 
  5. Grip the bar in an underhand grip (palms facing up).
  6. Slowly lower your weight down until both arms are fully extended.
  7. Drive the elbows down and engage the back as you pull up. 
  8. Keep the body straight throughout the movement and the spine neutral by bracing the abdominals and glutes. 
  9. Stop when your chin is slightly higher than your hands.
  10. Repeat for the desired reps and sets.

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Tips From Expert

  • The weight you choose on the machine will be subtracted from your body weight. For example, if you weigh 150 lbs and select 25 lbs, you'll lift 125 lbs. Less machine weight makes the assisted chin-up harder.
  • Emphasize mind-to-muscle connection to improve muscle engagement in the assisted chin-up. As you drive the elbows down, use the back and arm muscles to establish the chin-up.

Optimal Sets and Reps

Determine your fitness goals before programming assisted chin-ups into your training routine. Pinpointing your goals is crucial for selecting the ideal sets and reps to enhance progress.

Training TypeSetsReps
Strength Training3–53–5
Hypertrophy3–48–12
Endurance Training2–38–15
Power Training3–52–6
Optimal Sets & Reps of Assisted Chin-Up

How to Put in Your Workout Split

The assisted chin-up is an upper-body exercise that focuses on engaging the latissimus dorsi (lat) muscle. It also incorporates secondary muscles like the biceps brachii and upper trapezius. Adding this exercise into your workout routine can boost upper body strength and promote hypertrophy in these muscles. 

In a muscle-focused split, this exercise should be incorporated into back days. These splits are often divided into muscle groups like back and biceps or chest and shoulders. 

For an upper and lower-body split, the assisted chin-up is best suited for upper-body days. This is because of its emphasis on engaging upper-body muscles like the lats and biceps. 

As this is a pull exercise, it could also be added to pull days in a push-and-pull split. The biceps, forearms, and back muscles are categorized as pull muscles. Check out this 5-day workout split for an example workout program for hitting the gym. 

To promote strength gains, the intensity of the assisted chin-up can be increased by decreasing the weighted assistance. This should be done at an achievable weight for the recommended reps to increase strength. For endurance, more weight will be needed as assistance to hit the targeted higher repetitions. 

Primary Muscle Groups

Latissimus Dorsi

Large, triangular shaped muscles located just below your shoulder blades. They extend along your spine down to your pelvis.

Latissimus Dorsi 

The latissimus dorsi is a v-shaped, flat muscle located in the back. It is one of the largest muscles in the body. It creates movement in the upper body to support respiration and stabilize the spine during movement. 

Connected to the arm bone (humerus), the lats allow different arm motions like adduction, medial rotation, and extension. This translates to bringing the arm toward the body, turning it inward, and extending it away from the body respectively.  

In the assisted chin-up, the latissimus dorsi is activated to stabilize the spine and pull the body up. This muscle has a very high muscle activation rate averaging 117% during the chin-up exercise. The less assistance you require, the more the lats will be activated.

Secondary Muscle Groups

Upper Trapezius

Triangular shaped muscles located between your neck and shoulder blades.

Biceps Long Head

Most outside part of your bicep.The front of your upper arm.

Biceps Short Head

Most inside portion of the biceps. Located at the front of your upper arm closest to your chest.

Brachialis

Muscle which starts at the middle of your upper arm and connects just below the elbow.

Brachioradialis

Muscle located between outside portion of your forearm from the elbow to the wrist.

Biceps Long Head 

The long head of the biceps (LHB) is one of the heads of the biceps brachii, a large, thick muscle. It is located in the front of the upper arm on the lateral side of the biceps brachii, away from the body’s midline. The primary function of this muscle is to rotate the arm inwardly and allow elbow flexion.

Elbow flexion is used in daily movements like carrying items and brushing our teeth. Keeping this muscle healthy and strong is crucial for stabilizing part of the humerus and supporting elbow flexion. Incorporate these long-head bicep exercises into your workouts to further target this muscle. 

Biceps Short Head

The biceps short head is the other head of the biceps brachii, shorter than its counterpart. It is located at the medial section of the upper arm, towards the body’s midline. 

Its functions include supporting elbow flexion, forearm rotation, and adduction of the humerus, toward the body’s midline. Health in this muscle is needed for everyday activities, like carrying groceries and pulling open doors. 

During a chin-up exercise, the biceps as a whole can reach a muscle activation rate of up to 96%.

Brachialis

The brachialis is a muscle in the arm that primarily establishes elbow flexion. It is one of the largest elbow flexors, located on the front of the upper arm beneath the biceps brachii. 

Acting as the primary flexor of the elbow, the brachialis is important for day-to-day functions. We use this muscle when we pick up groceries and wash our hair. The assisted chin-up utilizes this muscle for elbow flexion to support the pulling movement needed to lift the body. 

Brachioradialis

The brachioradialis is a superficial muscle located in the forearm. The primary function of the brachioradialis is to stabilize the elbow joint during flexion and bending the elbow. It also rotates the forearm outward and inward when we flip our hands over. 

We use the brachioradialis to wash and dry our hands, turn on the shower, and put away groceries. In the assisted chin-up, the brachioradialis is a secondary muscle that stabilizes and flexes the elbow during the exercise. 

Upper Trapezius

The upper trapezius is the smallest part of the larger trapezius muscle, also known as the traps. It covers the top section of the base of the neck and the shoulders. This muscle's functions include keeping the neck upright, moving the neck, stabilizing the scapula, and lifting the arms.  

We use the upper trapezius when shrugging our shoulders and reaching for a cup in the kitchen cabinet. Maintaining strength in this muscle is crucial for preventing back, neck, and shoulder pain, as it helps support healthy posture. Consider other exercises for back workouts at home and at the gym to target the back muscles.

Equipment

Assisted Power Tower

Assisted Power Tower

This is great for beginners to practice compound upper body movements. Ensure your feet or knees are firmly against the pads. Adjust resistance as needed.

Variations

Exercises that target the same primary muscle groups and require the same equipment.

Alternatives

Exercises that target the same primary muscle groups and require the different equipment.

Who Should Do?

Those Seeking To Improve Upper Body Strength

Assisted chin-ups incorporate numerous upper body muscles, including the latissimus dorsi and biceps brachii. Approaching training to address any weaknesses in the upper body is crucial for overall quality of life. 

Many health benefits are associated with a strong upper body, including better coordination, improved posture, and increased shoulder mobility. It provides more stability to joints like the shoulder and elbow to reduce injury risk or loss of function. 

Bodybuilders

Bodybuilders are famous in the fitness world for their dominating muscular physiques. To achieve these hard-earned physiques, they must prioritize balanced nutrition and quality exercise to promote hypertrophy

The assisted chin-up is a quality exercise for targeting the upper body and boosting muscle growth. It incorporates back muscles like the latissimus dorsi and other secondary muscles such as the upper trapezius. 

Athletes

The assisted chin-up should be inserted into athletes’ training programs for desirable health benefits. This exercise can improve stability in the shoulder and elbow joints to reduce injury risk in athletes. 

In sports, shoulder injuries are common, so decreasing the chances by improving joint stability is crucial. Plus, prioritizing exercises like the assisted chin-up promotes strength in the upper body muscles, like the lats. Stronger muscles can directly affect athletic performance, so strengthening these muscles is a game-changer for athletes. 

Who Should Not Do?

Anyone With Shoulder Injuries

Shoulder injury rates in athletes range between 18% and 61% in overhead throwing or smashing sports and 90% in elite swimmers. Anyone with a shoulder injury, such as a rotator cuff injury or shoulder strain, should not perform the assisted chin-up. 

If an injury already exists in this area, it can cause excessive stress on the preexisting injury. This can raise the risk of further damage to the injury, resulting in more pain and a longer recovery time. Consult your doctor before exercising to prevent any preexisting injuries from worsening. 

Older Populations With Mobility Issues

Older populations with mobility issues may have difficulty getting up and down from the machine. With mobility concerns in place, this can raise the risk of injury in these older populations with the threat of falling. 

Some variations to consider instead of the assisted chin-up include the bent-over and seated lat rows. These exercises incorporate the latissimus dorsi as the primary muscle. They are more accessible for individuals with mobility issues to perform as it does not require climbing onto a pull-up machine. 

Anyone With A Wrist Injury

Anyone with a wrist injury is recommended not to perform the assisted chin-up. Due to the position holding the bar for the chin-up, it can place unnecessary strain on the injured joint. This can raise the risk of worsening the preexisting injury or increasing associated pain. 

Alternatives to the assisted chin-up include the single-arm bent-over and seated row. These require less wrist movement while still targeting the latissimus dorsi. Before proceeding, consult a medical professional to prevent pre-existing wrist injuries from worsening. 

Benefits Of The Assisted Chin-Up

Builds Strength

The assisted chin-up is excellent for building strength in the upper body. It engages numerous muscles, such as the lats and biceps, promoting hypertrophy and increasing strength in these muscles. 

Through research, we’ve learned that various methods of exercise programming can support increased strength. Lifters can experience strength gains by exercising one to three times a week. Prioritizing exercises like the assisted chin-up can build strength by engaging numerous muscle groups in the upper body. 

Defines Muscles

One sought-after method of promoting a more toned and defined physique is exercise to stimulate hypertrophy. Exercises like the assisted chin-up can enhance muscle definition. 

Two factors can vastly determine the quality of a lifter’s muscle definition: body fat and muscle mass percentage. If a lifter’s body fat percentage is too high, it will be harder to notice the muscle underneath the fat. If muscle mass is too little, the quality of the muscle definition may be lacking. 

Many lifters enter a cutting or bulking phase to reduce body fat and increase muscle mass. Either way, lifters can expect defined muscles by prioritizing balanced nutrition and practical exercises like the assisted chin-up. 

Improves Posture

Posture affects our daily lives more than a person may initially consider. A large population is affected by neck and back pain due to poor posture in school and work environments. Exercise and postural awareness are two of the best methods of improving posture. 

Individuals who suffer from neck and back pain can emphasize postural awareness to correct poor posture as they notice it. Strengthening posture-supportive muscles, like the trapezius, is another effective method. Exercises like the assisted chin-up can target some postural muscles which can improve posture and reduce pain.

Frequently Asked Questions

Are assisted chin-ups effective?

Assisted chin-ups are an effective exercise that incorporates multiple muscle groups. It utilizes the latissimus dorsi, the biceps brachii, and other muscles like the brachioradialis and upper traps.

How much weight should I put on an assisted chin-up?

For beginners, we recommend starting with ten pounds. If this is too easy, you can adjust from there. Advanced lifters can also start at a lower weight and adjust the weight to accommodate their fitness level.

What is the difference between an assisted pull-up and an assisted chin-up?

The hand grip is the main difference between the assisted pull-up and chin-up. The chin-up incorporates an underhand grip, while the pull-up utilizes an overhand grip. The grips allow for different muscle groups to be emphasized in the movement.

What do assisted chin-ups target?

The primary muscle targeted in the assisted chin-up is the latissimus dorsi, a large back muscle. The exercise utilizes secondary muscles like the upper traps, biceps long and short heads, brachioradialis, and brachialis.

Resources

Endomondo.com refrains from utilizing tertiary references. We uphold stringent sourcing criteria and depend on peer-reviewed studies and academic research conducted by medical associations and institutions. For more detailed insights, you can explore further by reading our editorial process.

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