Cardiorespiratory Fitness Clinical Trial
Official title:
Exercise Sprint Snacks: The Effects of Prolonged Rest, Reduced Exertion High-intensity Interval Training (PR-REHIIT) Compared to Standard Reduced Exertion High-intensity Interval Training (REHIIT).
An adapted sprint interval training protocol involving 2-3 repeated 20-second sprints
separated by 2-3 minutes rest (termed reduced exertion high- intensity interval training
(REHIIT)) has been developed and has been shown to promote fitness benefits. This data shows
how little exercise one may need to improve cardiorespiratory fitness, provided they are
willing to work very hard. However, it is unknown whether the benefits of REHIIT are because
of the "all-out" nature of the sprint efforts themselves or the pattern of completing sprints
with relatively short (i.e., minutes) rest periods within a workout session.
We are inquiring whether performing the same number and style of sprints with prolonged rest
(i.e., 1-4 hours of rest in between sprints) is equally effective for improving aerobic
fitness when compared to more traditional sprint interval training with 2-3 minutes of rest
between sprints. Such information may make the effectiveness of sprint training more
accessible and approachable for individuals unwilling or unable to plan a purposeful REHIIT
exercise session into their day. If the rest interval could be prolonged then it may be
possible to perform a few sprints as "exercise snacks" throughout the day without the need
for a structured interval training session.
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