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Dumbbell Cross Body Hammer Curl - BICEPS

How to Do Dumbbell Cross Over Hammer Bicep Curls | In-Depth Guide [VISUAL LEARNERS]

Proper Form, Common Mistakes, Variations + Easier & Harder | Home Resistance Training

LET’S DO IT: HOW TO DO Dumbbell Cross Body Hammer Curls - FULL VERSION (6 min)

WHAT DO YOU WANT TO SEE?

QUICK DEMO

QUICK DEMO

QUICK DEMO: HOW TO DO Dumbbell Cross Body Hammer Curls - FAST VERSION (2 min)

MUSCLES THIS WORKS

MUSCLES

MAIN MUSCLES WORKED IN Dumbbell Cross Body Hammer Curls

biceps brachii, brachialis, & brachioradialis

STARTING POINTERS

Starting Pointers

WHAT WE'RE DOING TODAY

MOVE INTRO: GETTING STARTED WITH Dumbbell Cross Body Hammer Curls (3 min)

ALL WE'RE DOING:
We're just going to bend one arm up toward the middle of our chest, while turning our palm to face down.

This is an easy bicep curl alternative to strengthen your biceps and arms. You only need one dumbbell to do this alternating hammer curl exercise while standing.

The cross-body hammer curl will work all the muscles that allow us to bend our elbows (these are called elbow flexors.  The forearm starts in a neutral grip hand position where our palms are facing our sides and is completed with the forearm moving into a face-down position (pronated) position.  In the pronated position, the brachialis is the strongest of the elbow flexors (meaning this muscle will get more work in this exercise than other bicep curls).

HOW TO DO THE EXERCISE

LOOKS

HOW Dumbbell Cross Body Hammer CurlS SHAPE OUR BODY

Builds size and tones muscles of the upper arm and forearm.

PROPER FORM

PROPER FORM: Dumbbell Cross Body Hammer Curls

LET’S DO IT: HOW TO DO Dumbbell Cross Body Hammer Curls - FULL VERSION (6 min)

EQUIPMENT, SETS & REPS

EQUIPMENT

SUGGESTED STARTING WEIGHT FOR WOMEN:

8-10 pounds

SETS & REPS:

2 sets of 8 – must fatigue the muscle

PACE:

Quicker (0.5 sec) up movement (concentric) – increased power will increase the involvement of the brachioradialis. And slow eccentric (lowering) 3-5 seconds.

BODY POSITION

BODY POSITION FOR THE Dumbbell Cross Body Hammer Curl

FEET: Shoulder width apart, toes forward

BODY STANCE: Neutral spine position, knees slightly bent, sternum lifted, shoulder blades in and down the back.

HAND/GRIP: Neutral grip - Palm facing inwards – towards the body.

ARM: Down by your sides. Elbows straight. Upper arm resting by the body but not squeezed in. This will facilitate biceps activation because it will have to support the upper arm as opposed to locking it on the body. It also increases core muscle activity because you are not bracing your trunk and arm together.

NECK: Neutral and relaxed.

HOW TO DO

HOW TO DO Dumbbell Cross Over Hammer Curls

CUE: The movement is isolated to the elbow joints, flexion and pronation.

This exercise is done with one arm at a time.

Begin with your palm facing your side. As you bend your elbow, your hand will turn to face down. 

Leading with the back of your hand, bend your elbow to pull the dumbbell up and across your body towards your opposite shoulder (the hand will end its upward movement about mid-chest – not all the way to the shoulder). 

Once you have reached the end of your elbow flexion (fully bent), pause, then slowly lower the weights back down to the starting position to begin the next rep.

HOW TO SAFELY GET OUT OF THE EXERCISE

Straighten your elbow, bend your knees and hips to squat down and set weights on the floor.

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COMMON MISTAKES

COMMON MISTAKES

WHAT TO AVOID WITH THE Dumbbell Cross Body Hammer Curl

KEY TIP:

Guess what? Good news! Many avoids are the same for most movements. Once you learn the basics, there's really only a few extra avoids for each individual movement.

MISTAKES: COMMON MISTAKES TO AVOID (6 min)

1. Avoid moving through the wrists

AVOID: Avoid bending at the wrists.

WHY NOT?

  • Poor alignment (bent forward or backward) or repetitive movement through the wrist can lead to joint and/or soft tissue irritation or injury over time.

WHAT TO DO: 

  • Your wrists should be in line with your forearm and should be still throughout the exercise. 
avoid-bending-wrist-cross-body-hammer-curl-dumbbell-common-mistakes

2. Avoid Arching Your Low Back

AVOID: Avoid extending low back

WHY NOT?

  • This compresses the joints of this area of the spine and can irrirate the tissues or cause muscle strain.

WHAT TO DO:

  • Maintain a neutral spine position - keep your abs engaged gently to help keep the spine from arching back.
  • Avoid locking the knees - this can cause you to arch your low back.
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3. Avoid Locking Knees

AVOID: Avoid straightening or locking the knees of standing legs.

WHY NOT?

  • This tends to change the lumbar curve, pull on the hamstrings and decrease the muscle activity of the legs.
  • Locking the knees puts stress on the knee joint and can make it more difficult to maintain a neutral spine. The knees should be soft.

WHAT TO DO:

  • Keep a soft bend in the knees.
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4. Avoid Rounding Upper Back

AVOID: Avoid rounding your upper back or shoulders.

WHY NOT?

  • This can lead to neck, shoulder injury, or damage over time and can result in using the wrong muscles (upper trap).

WHAT TO DO:

  • Pull your shoulders blades back, and in towards each other, thinking about having a broad chest - this will help you keep a healthy position with the shoulders.
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5. Avoid Rotating Torso

AVOID: Avoid letting your upper body rotate as you pull the dumbbell up.

WHY NOT?

  • This can cause soft tissue or joint irritation or injury.

WHAT TO DO:

  • The shoulder of the working arm may rotate forward into adduction and internal rotation.
  • Keep the shoulders back and the chest open.
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VARIATIONS

VARIATIONS

VARIATIONS OF the Dumbbell Cross Over Hammer Curl

Alternating

VARIATIONS: HOW TO CHANGE UP Dumbbell Cross Body Hammer Curls (3 min)

Alternating Cross-body Dumbbell Curl

This will change the core muscle activation – the core will not have to stabilize against the weight of two dumbbells, but the core muscles will have to stabilize against a pull to one side – so more of the lateral muscles (obliques and quadratus lumborum). This can be done by doing one set on one side.

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MAKE IT HARDER

HARDER

MAKE THE Dumbbell Crossbody Hammer Curl MORE CHALLENGING

HARDER: HOW TO MAKE Dumbbell Cross Body Hammer Curls HARDER (6 min)

ISO Hold

Isometric Hold Dumbbell Crossbody Hammer Curl

Hold 5-10 seconds. At 90 degrees of flexion to really target the biceps, at 100 degrees to target the brachialis more.

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Keep elbow bent

Keep Bend In Elbow Dumbbell Crossbody Hammer Curl

Keep some bend in the elbow for the entire set – this will keep some tension on the muscles at all times. So you will not fully straighten your arms at the bottom.

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Slow Eccentric

Slow Eccentric Crossbody Hammer Curl

Lower the weight much more slowly- like 5-10 seconds per rep. This is another technique to really fatigue the muscle and build muscle.

slow-eccentric-crossbody-hammer-curl-variations-harder

MAKE IT EASIER

EASIER

MAKE THE Dumbbell Crossbody Hammer Curl MORE DOABLE

EASIER: HOW TO MAKE Dumbbell Cross Body Hammer Curls EASIER (5 min)

Seated 

Seated Dumbbell Cross Body Hammer Curl

Seated so the focus can be on the lower arm movement. Less attention is needed to stabilize the torso.

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Stability Ball

Stability Ball Dumbbell Cross Body Hammer Curl

Seated on ball decreases the core activation - so less than standing but more than sitting on bench or chair.

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WHAT WE'RE DOING TODAY

WHAT & WHY

BENEFITS OF TRAINING THE Brachialis & Brachioradialis

WHAT: WHAT Hammer Curl IS ALL ABOUT (9 min)

WHAT

WHAt's this all about anyway?

Strengthen OTHER Muscles At the Front of Our Arms ASIDE from our Biceps

The Crossbody Hammer curl exercise will strengthen our biceps too, no doubt about that, but did you know we actually have other muscles in the vicinity of our arm where the biceps muscle is too?

One of them is called the brachialis. This is a smaller muscle that lies beneath the biceps muscle. But it's important too! And it also bends the elbow.

The brachialis muscle is able to "shine" more and be more a part of what we're trying to do when we bend our elbows with our palms facing down or facing each other - things like pulling a chair out from the table, or trying to pull that stinkin' freshly watched fitted sheet over the bed. Or holding a camera for a long time because you just don't want to miss any memories of that family beach gathering.

Because the biceps brachii is the strongest of the muscles that bend the elbow, in order to work the deeper, smaller brachialis muscle more effectively without the biceps taking over, we adjust our forearm position - when we turn our palms downward, this puts the biceps muscle in a stretched position that limits its ability to do the work. 

WHY BOTHER DOING IT?

WHY

WHY DO WE EVEN CARE?

Ever Wish You Could Pull Yourself Up Better? Or Just Open Those Darn Vacuum-Seal Tupperware?

Training these muscles can really improve your pulling strength, especially when your palms are facing down - things like when hiking, pulling yourself up a larger rock/boulder, or when I try to get the lid of my vacuum seal glassware ;).

The reason to work the brachialis is because it is able to contribute in positions where the biceps muscle is not as strong. So for instance, typically, you can carry or lift more when your palms are up, but we also need to be able to lift and carry things with our palms in other positions right? 

When the forearm is pronated (this is when your palms are facing down) the bicep is weaker but the brachialis is just as strong, regardless of what position the forearm is in. 

These elbow flexor exercises involve positioning the forearm in varying degrees of pronation, neutral, and supination in order to target the different muscles.

 

EVERYDAY LIFE

EVERYDAY LIFE &

MUSCLE FUNCTION

HOW WE USE OUR bICEPS MUSCLES IN EVERYDAY LIFE

1. BENDING THE ELBOW

  • Bringing your morning cuppa joe to your lips (I have cuppa black tea - doesn’t sound nearly as romantic)
  • Lifting objects where you bend the elbows
  • Weeding
  • Pulling a door open
  • Eating
  • Moving furniture with desks & tables with palms underneath the top of the surface
  • Hammering

2. ROTATING THE FOREARM SO THE PALM IS UP, ESPECIALLY WITH BENT ARM - SUPINATION (BICEPS BRACHII ONLY):

  • Turning a doorknob
  • Using a screwdriver
  • Picking up your iPhone to look at it
  • Knitting/Crocheting - repeatedly turning the palms down & back up
  • Turning a can opener
  • Hand-quilting

3. ROTATING (PRONATION TO SUPINATION) WHILE BENDING (FLEXING) AND STRAIGHTENING (EXTENDING) THE ELBOW

  • Picking items up and putting them in your mouth - like picking and eating raspberries
  • Brushing hair
  • Treading water
  • Playing tennis, golf

4. THE BICEPS BRACHII ALSO FLEXES (MOVES UP IN FRONT OF THE BODY) THE UPPER ARM - BUT THAT FUNCTION IS NOT TARGETED WITH THIS EXERCISE

HOW TO FEEL WHAT MUSCLE IS WORKING

How to Feel What Muscle is Working

Holding a dumbbell, bend the elbow to 90 degrees. You can feel the bulk of the muscles on the upper arm, and the biceps tendon as it crosses the eye of the elbow (where they insert the needle for blood draws) and insert on the forearm. 

Rotate the forearm palm up and palm down, you will feel the muscles in the forearm (close to the elbow joint) working. Holding the arm still and placing your non-working arm around the forearm, move the wrist in all directions - you will feel all of the muscles in the forearm working to move the wrist - these are the same muscles that stabilize the wrist so that it does not move during the elbow flexion exercises.

SCIENCY STUFF

SCIENCY STUFF

SPIFFILICIOUS FACTS ABOUT MUSCLES & MOVES

About these muscles: The elbow is formed by three bones (the upper arm bone and two bones in the forearm) and three joints. THE ELBOW JOINT IS LARGELY A HINGE JOINT, where the two bones (ulna and radius) of the forearm form joints with the upper arm bone. The three main muscles that act to bend (flex) the elbow are the biceps brachii, brachialis and brachioradialis. The biceps brachii has two heads that originate on the shoulder blade. The brachialis and brachioradialis muscles originate on the lower part of the upper arm bone (humerus). All three muscles cross the elbow to insert on the bones of the forearm. The biceps brachii and brachialis muscles make up the bulk of the front of the upper arm and when they contract, you can picture the lower arm (the forearm and hand) getting pulled up toward your body as the two muscles pull on the forearm bones they’re attached to. 

The biceps brachii flexes the forearm (bends the elbow), supinates the forearm (turns the forearm so the palm is up), flexes the arm (lifts the arm to the front of the body). When the forearm is pronated (palm down), the biceps brachii becomes less capable of flexing the forearm. Attached to radius forearm bone. [does have an attachment to the ulna by the aponeurosis to the fascia].

The brachialis muscle flexes the forearm regardless of whether the forearm is pronated or supinated. When the forearm is pronated the brachialis is more capable of flexing the forearm than the biceps is. The brachialis is attached to MUCH of the upper arm bone, the humerus - about 2/3rds in fact! It’s the prime elbow flexor when the forearm is pronated. Attached to ulna forearm bone.

The brachioradialis is another elbow flexor - the belly of the muscle lies on the forearm-it originates on the bottom of the upper arm bone and attaches to the end of the radius (one of the bones in the forearm). It is most active when the forearm is between pronation or supination, as in hammering. The brachioradialis will contribute to elbow flexion in all forearm positions - the amount of contribution increases when the weight is heavy or the movement is fast (contributes when the biceps and brachialis need help). In the Zottman the brachioradialis will contribute most during the eccentric phase of the movement, when the forearm is pronated. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4526813/

Because the biceps brachii is the strongest of the muscles that bend the elbow, in order to work the deeper, smaller brachialis muscle more effectively without the biceps taking over, we adjust our forearm position - when we turn our palms downward, this puts the biceps muscle in a stretched position that limits its ability to do the work. 

The bones of the forearm - the ulna and radius form a joint that rotates one bone across the other bone. The result is the ability to turn your hand over, from a palm up to a palm down position. When the forearm rotates, it changes the way the muscle works. Knowing this, it is possible to exercise the elbow flexors in a variety of different positions of the forearm to target specific muscles.

ALLLL MUSCLES & WHEN

ALL MUSCLES WORKING & WHEN DURING THE Dumbbell Cross Body Hammer Curl

The shoulder and core stabilizers work throughout the movement to hold the spine in a neutral position, hold the shoulder blade down and back (depression and retraction), and to hold the upper arm still.

The brachialis will do most of the work to bend the elbow. The biceps and brachioradialis contribute when power is needed – for quicker movements or heavy loads. 

The wrist muscles (flexor carpi radialis FCR, extensor carpi radialis longus (ECRL)) work to hold the wrist in a neutral position as the weight of gravity pulls down on the weight held in the hand. 

The brachialis and biceps (to some extent) work eccentrically to straighten the elbow and return to the starting position. The brachioradialis does not contribute much if at all to the eccentric phase.

PIN IT FOR LATER!

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