Shapes & Edges — Triangle, Long Bar, and Multi-Edge Tools

TL;DR

• Pick geometry by region size and grip comfort. Use broader radii for sweeping, smaller radii for focal contours.
• Triangle + long bar covers most use‑cases; multi‑edge adds precision when needed.

Geometry and edges

• Broad radius edges glide smoothly and distribute pressure—ideal for large surfaces.
• Small radius edges allow precise contact at borders but require lighter pressure.
• Beveled vs rounded: beveled can feel “sharper”; rounded is friendlier for beginners and home use.

Grip and ergonomics

• Triangle: pinch grips for high control at wrists/forearms/neck lines.
• Long bar: two‑handed sweeping across quads/hamstrings/calves and back.
• Multi‑edge: switch edges quickly to adapt to ankle/shoulder contours.

Region → edge mapping

• Calves/quads/hamstrings: long bar broad edge for sweeps; triangle small edge for hotspots.
• Forearm: triangle small/medium edge; avoid bony tunnels and spiral grooves.
• Upper back: long bar broad edge; finish with thoracic mobility.
• Around joints (knee/ankle): multi‑edge small radii with very light pressure.

Selection guide

• If buying one: triangle (control + versatility).
• If buying two: add a long bar for legs/back efficiency.
• Clinics: include a multi‑edge for precise contouring and varied radii.

Safety

• Lighter pressure with smaller radii; avoid direct scraping on bony prominences.
• Stop with sharp pain, tingling, or dizziness; avoid acute injuries and open wounds.

FAQs

Will a sharper edge work better?

Not necessarily—comfort and control matter more than edge sharpness.

Can one tool do everything?

Triangle handles most. A long bar improves efficiency on large regions; multi‑edge adds fine control.

Reference

• IASTM clinical parameters and tool selection notes: https://pmc.ncbi.nlm.nih.gov/articles/PMC6670063/