fasciaA tennis ball offers a softer starting point for the seated foot guide. Lacrosse balls are firmer and concentrate pressure over a smaller area. They are not automatically interchangeable in a routine.
Before using it
Ball guides now include seated foot, palm and forearm options and standing wall-supported setups. Read the individual guide: pressure and positioning differ by region.
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Sources & further reading
United Lincolnshire Hospitals — Plantar Fasciitis Exercises ↗Source-linked educational summary · Updated November 8, 2026 · No individual clinician review