How Iridium Programs This

Iridium recognizes the anterior deltoid engagement used in the halo portion of this movement and cross-references your 7-day training history to ensure recent pressing workouts haven't pre-fatigued your shoulders. If your shoulder recovery score is low, the AI will likely swap this for a more stable oblique isolation exercise to prevent form breakdown.

Form Cues

Keep your lower back pressed firmly into the floor
Circle the dumbbell tightly around your head like a halo
Exhale sharply as you crunch up and twist
Touch your opposite elbow toward the opposite knee
Control the weight slowly as you lower back down

Don't

Don't let the dumbbell hit your head during the halo
Don't pull on your neck with your hands
Don't arch your lower back off the floor
Don't rush the transition between the halo and crunch

Common Mistakes

Using momentum to swing the weight
Flaring elbows too wide during the halo
Lifting the lower back off the ground
Pulling the head forward with neck muscles
Performing the halo too quickly

Muscles Worked

This exercise primarily targets the internal and external obliques through the rotational crunch, helping to define the waistline. The halo component engages the anterior deltoids and upper back stabilizers, while the rectus abdominis works to keep the ribcage down and the back flat against the floor.