Nishaana
Anatomy terms.
The muscles and structures you train, explained in plain language.
39 terms defined
Abductors
Muscles that move the legs away from the body's midline.
Adductors
Inner-thigh muscles that pull the legs together.
Agonist Muscle
The prime mover responsible for a given joint action.
Antagonist Muscle
A muscle that opposes the action of the prime mover.
Anterior Chain
The muscles along the front of the body, including quads, abs, and chest.
Biceps Brachii
The front-of-arm muscle that bends the elbow and supinates the forearm.
Brachialis
An upper-arm muscle beneath the biceps that bends the elbow.
Calves
The muscles at the back of the lower leg that move the ankle.
Cartilage
Smooth tissue that cushions joints and reduces friction.
Core
The muscles of the trunk that stabilize the spine and pelvis.
Deltoid
The shoulder muscle with front, side, and rear heads that raises the arm.
Erector Spinae
The muscles running along the spine that extend and support the back.
Fascia
Connective tissue that surrounds and supports muscles.
Forearm Flexors
Muscles that bend the wrist and fingers and support grip.
Gastrocnemius
The large, visible calf muscle that points the toes.
Gluteus Maximus
The largest glute muscle, responsible for hip extension and power.
Gluteus Medius
A hip muscle that stabilizes the pelvis and abducts the leg.
Hamstrings
The muscles on the back of the thigh that bend the knee and extend the hip.
Hip Flexors
Muscles that lift the thigh toward the torso.
Insertion (Muscle)
The moving attachment point of a muscle that pulls toward the origin.
Latissimus Dorsi
The large back muscle that pulls the arms down and back.
Ligament
Tissue connecting bone to bone and stabilizing joints.
Obliques
The side ab muscles that rotate and bend the torso.
Origin (Muscle)
The fixed attachment point of a muscle, usually closer to the body's center.
Pectoralis Major
The main chest muscle that pushes the arms forward and across the body.
Posterior Chain
The muscles along the back of the body, including glutes, hamstrings, and back.
Quadriceps
The four muscles on the front of the thigh that extend the knee.
Rectus Abdominis
The front ab muscle that forms the six-pack and flexes the spine.
Rhomboids
Upper-back muscles that pull the shoulder blades together.
Rotator Cuff
Four small muscles stabilizing the shoulder joint.
Serratus Anterior
A muscle on the rib cage that helps move and stabilize the shoulder blade.
Soleus
A deep calf muscle important for standing and walking.
Stabilizer Muscle
A muscle that holds a joint steady while others produce movement.
Synergist Muscle
A muscle that assists the prime mover during a movement.
Synovial Joint
A freely movable joint cushioned by fluid, like the knee or shoulder.
Tendon
Tough tissue connecting muscle to bone.
Transverse Abdominis
The deep core muscle that stabilizes the spine like a corset.
Trapezius
The upper-back and neck muscle that moves and stabilizes the shoulder blades.
Triceps Brachii
The back-of-arm muscle that straightens the elbow.
Common questions.
What does the anatomy glossary cover?
The Nishaana anatomy glossary defines 39 terms, including Abductors, Adductors, Agonist Muscle. Each entry leads with a plain, one-sentence definition, then a worked example with real numbers so you can apply it in the gym.
Are these anatomy definitions free?
Yes. Every glossary definition is free and open — no signup, no paywall. When you are ready to apply a concept, Nishaana turns it into your actual training: it tracks it and auto-progresses your weights for you.
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