Warrior I anatomy

Warrior I · Virabhadrasana I · Tư thế chiến binh I

Warrior I mainly works quadriceps, gluteus maximus (right), erector spinae, deltoid; it stretches rectus femoris (left), iliopsoas (left), gastrocnemius (left), soleus (left); adductors (right), tibialis anterior (right), fibularis group (left) stabilize.

3D anatomy model of Warrior I: working muscles in red, stretching in blue, stabilizing in yellow

Opening the 3D model…

Bend the front knee and straighten the back leg with the back foot angled about 45°. The torso faces forward and both arms reach overhead.

Muscles in this pose

Working (contracting): Quadriceps, Gluteus maximus (right), Erector spinae, Deltoid, Supraspinatus, Trapezius, Serratus anterior, Triceps brachii

Stretching: Rectus femoris (left), Iliopsoas (left), Gastrocnemius (left), Soleus (left), Rectus abdominis, Latissimus dorsi, Pectoralis major

Stabilizing: Adductors (right), Tibialis anterior (right), Fibularis group (left), Gluteus medius, Transversus abdominis, Obliques

Why these muscles work or stretch

Quadriceps · Working (contracting): Holds the front knee bent
Deltoid · Working (contracting): Raises the arms overhead
Trapezius · Working (contracting): Rotates the shoulder blades upward
Rectus femoris · Stretching: Two-joint muscle: straightens the knee but is stretched by the extended hip
Iliopsoas · Stretching: Stretched by the extended back hip
Fibularis group · Stabilizing: Presses the outer edge of the back foot down

Practice cues

Square your hips to the front
Drop your tailbone to lengthen the front of the back hip
Reach up without hunching your shoulders

Benefits

Strengthens the quadriceps and glutes of the front leg
Stretches the iliopsoas and calf of the back leg
Trains stability of the pelvis and torso
Opens the chest and shoulders as the arms reach up

Cautions / contraindications

Use caution with knee pain: front knee over the ankle, no deeper than 90°
Go gently with low back pain: drop the tailbone, avoid arching the lower back
Shoulder injury or high blood pressure: keep hands on hips instead of overhead

Easier variations

Shorten the stance and bend the front knee less
Keep hands on hips, or lift the back heel if squaring the hips is hard

General information, not a substitute for advice from a doctor or teacher.

Written and reviewed by Yoga An Viên center · Updated 18/10/2026

How to practice this pose (YogaWay, in Vietnamese)

Related poses

High Lunge (Crescent Lunge) Ashta Chandrasana
Low Lunge Anjaneyasana
Upward Salute Urdhva Hastasana
Chair Pose Utkatasana
Wild Thing Camatkarasana
Wheel Pose (Upward Bow) Urdhva Dhanurasana

A free community project by Yoga An Viên center · Model: Z-Anatomy (CC BY-SA 4.0), based on BodyParts3D © DBCLS (CC BY-SA 2.1 JP)