Dumbbell Training Anatomy Guide

Generates monochrome grayscale technical illustrations, biomechanically precise fitness guides, clean 3D anatomical figures, scientific chart aesthetics, minimalist style, and no artistic exaggeration 

2x4 grid layout (a total of 8 panels), perfectly aligned cells, evenly spaced, fine black borders, numbered from 1 to 8

Neutral motion human body (gender-neutral), proportional anatomy, consistent figure across all panels

Dumbbell Training sequence (key positions only):
1. Dumbbell Curls (Starting Position)
2. Dumbbell Curls (Top Contraction)
3. Shoulder Presses (Start at Shoulder Height)
4. Shoulder Press (Top Lock)
5. Dumbbell Side Raises (Arm Down)
6. Side raises (arm to shoulder height)
7. Dumbbell Squats (Starting from Standing)
8. Squats (bottom position)

Top left: Bold number + action name (Chinese) 
Center: Full body posture (clear joint positions)
Lower left corner: Brief technical explanation (2–3 lines, correct posture tips)
Overlay: Directional arrows showing the movement path (up/down/arc)

Correct joint alignment, neutral spine, proper elbow and knee positioning, realistic weight distribution, no exaggerated movements

Highly detailed grayscale shadows, soft studio lighting, subtle shadows, clean lines, and medical/sports science chart quality

Pure white background

No color, no background environment, no extra elements, no stylization, no blur