Nutrition
Regional Sweat Collection Test
A regional sweat collection test samples one body site during exercise—fast screening for sweat sodium that may differ from whole-body lab results.
A regional sweat collection test samples sweat from one body area—forearm, upper back, or patch site—during controlled exercise to estimate electrolyte concentration. It is cheaper and faster than whole-body methods but can mis-rank sodium needs if regional sweat differs from total loss.
Athletes use it to screen salty versus low sweaters before investing in full lab work.
Common questions
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Why do forearm and back sweat sodium differ?
Gland density and evaporation vary by site. Use regional results as a trend, not an exact gram-per-hour prescription without validation in your race conditions.
Related terms
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