Ultimate endurance test: 7 marathons, 7 days, 7 continents

The 35-year-old day care center operator from Belmont, Massachusetts, is one of 15 competitors from around the globe who will attempt the feat in January.

Nor has any other woman from the U.S. — a singular enticement to tackle the ultimate endurance test.

Next up, on consecutive days: back-to-back marathons in Punta Arenas, Chile; Miami; Madrid; Marrakech, Morocco; Dubai, United Arab Emirates; and Sydney.

Within a span of 168 hours — 59 of those spent recovering in compression socks aboard a charter flight shuttling competitors 23,560 miles from race to race — she'll have conquered all seven continents:

Pizzi fronted the cash but has been lining up corporate sponsors to help defray the cost.

[...] two companies — Ultima, which makes electrolyte replacement drinks, and Dr. Cool, which sells compression sleeves and other performance items — are covering about half of her expenses.

Training partner Janet Chambers, 43, of Boston, is confident Pizzi has the right stuff: She can do anything.