North Star Theory

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Are barefoot shoes worth it?

Last verified

Barefoot shoes are an option, not an essential upgrade. Some running studies found benefits, but they do not establish a safer stride or a transition timetable that works for everyone.

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Is a vibration plate worth it?

Last verified

Worth it for a narrow group: older adults, above all women past menopause, following a set routine for spine bone density and leg function. Reviews find those benefits but no effect on body fat or muscle. It will not build fitness or burn fat for a healthy younger person.

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Is an ab stimulator belt worth it?

Last verified

No, not for the reason it is sold. An electric current can add a little trunk strength and muscle size in small studies, but a review found no effect on body fat. It cannot flatten your stomach or bring out abs, because that depends on losing fat, which the belt does not do.

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Is an elevation training mask worth it?

Last verified

No. Controlled trials show the mask does not mimic altitude: it does not raise how much oxygen your blood carries or beat ordinary interval training, and in one trial wearing it made people stop sooner from breathlessness. At most it works the breathing muscles.

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Is blood flow restriction training worth it?

Last verified

Blood flow restriction is not a self-directed workaround for painful or injured joints. Potential training benefits need to be considered alongside individual screening, appropriate prescription and unresolved safety questions.

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