Drinking beetroot juice with a specific amount of nitrate doesn’t make the body use less oxygen when older adults with a certain type of heart failure exercise lightly — so if they feel less tired, it’s probably because their blood flows better or their heart doesn’t have to work as hard, not because their muscles are using energy more efficiently.

Drinking beetroot juice every day for a week can help older adults with a certain type of heart condition ride a stationary bike longer before getting tired, which might make everyday activities easier for them.

Drinking one glass of beetroot juice won’t help older adults with a certain type of heart failure exercise better, even though it raises a chemical in their blood — they might need to drink it every day for a while before they see any benefit.

If older adults with a specific type of heart condition drink beetroot juice every day for a week, their resting blood pressure may drop by about 14 points — which could be a meaningful improvement for their health.

Drinking beetroot juice for a week might help women over 50 with high blood pressure recover their normal heart rhythm faster after working out, which could mean their body’s stress and relaxation systems are working better together.

Drinking beetroot juice with 800 mg of nitrate after working out might lower blood pressure by about 9 points in women over 50 who have high blood pressure, helping their heart recover better.