Upper Back

Exercises:

1. Upper back stretch
2. Chest opening
3. Arm stretch across the chest
4. Wall Angels
5. Thoracic extension

General requirements (important to maintain):

— use the same animation system (shape + rotation + position) that already works correctly in Lottie

— one character, unified style

— smooth loop animations of 4–8 seconds

— no background

— lightweight (for mobile application)

CRITICALLY IMPORTANT (consider past animation errors):

1. NO abrupt opacity switches
   → all elements must always be visible
2. NO “jumps”
   → movement must be continuous
   → loop must be perfectly seamless
3. MINIMUM keys
   → only key phases of movement
4. EASY EASE
   → no linear abrupt transitions
5. READABILITY
   → user must understand the movement in 1 second

1. UPPER BACK STRETCH

Movement:
— arms forward
— back rounds (like a “hump”)

Important:
— focus on rounding the upper back
— head slightly tilts forward
— shoulders move forward

Error:
— cannot move only the arms
— movement must come from the back

2. CHEST OPENING

Movement:
— arms move back
— chest opens

Important:
— shoulders back
— chest slightly forward
— posture becomes “straight”

Error:
— cannot just spread the arms
— must read as opening the rib cage

3. ARM STRETCH ACROSS THE CHEST

Movement:
— one arm stretches across the body
— the other holds it

Important:
— movement is static (stretch)
— add a micro-rocking (very light)

Error:
— cannot make an active animation
— this exercise must be “calm”

4. WALL ANGELS

Movement:
— back flat (like against a wall)
— arms move up and down in an arc

Important:
— arms move synchronously
— elbows do not “break”
— movement strictly up/down

Error:
— cannot make circles
— cannot lift arms off the imaginary “wall”

5. THORACIC EXTENSION

Movement:
— chest moves forward
— upper back extends

Important:
— movement is small but noticeable
— focus on opening

Error:
— cannot make too strong of an arch
— must look safe

STRUCTURE OF ANY ANIMATION:

1. neutral
2. movement
3. peak
4. return

→ must have a smooth loop

PAUSES:

— in static exercises (stretches) add a micro-pause
— in dynamic ones — movement is continuous

ACCEPTANCE CRITERIA:

— movement is understandable without text
— no jerks
— no abrupt transitions
— loop looks infinite
— works correctly in Lottie

IMPORTANT:

This block critically affects the feeling of a “therapeutic application”,
therefore movements should be calmer and softer than in the shoulders.