An easier way to do high-intensity interval training

A 2023 study found that people with chronic conditions who took part in high-intensity interval training in the water—called aquatic HIIT or AHIIT—experienced a similar boost in endurance (their maximum sustained physical exertion) as people who took part in land-based HIIT. An AHIIT workout includes a warm-up, such as treading water, followed by intervals of rest and intense activity (such as swimming laps or doing four or five pool exercises in a row, as quickly as possible), for a total of 30 minutes.