Alana Barber has no qualms with the tough road laid out for her to qualify for Rio.

The race walker has reached the Athletics New Zealand B standard for the Olympics once in the 20km event and will aim to do it again at a World Cup race in Rome next weekend.

Barber says she's throwing all her eggs in one basket but knows once she qualifies she will be on track for a good showing.

She says once she gets the qualification standard she can concentrate on a top-12 finish at Rio.

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Barber hopes competing alongside elite race walkers next week will lift her to a second B standard.

She has had physiology tests to determine how far she can go and says the tests showed she's capable of doing the A standard if conditions go her way.

Barber says it'll be a very strong field and she's doing that event to help push her to a good time.