Abstract
High-Intensity Interval Exercise: Methodological Considerations for Behavior Promotion From an Affective Perspective.
Highlights
High-intensity interval exercise and high-intensity interval training (HIIT), an exercise approach alternating short bouts of vigorous exercise with less intense recovery or rest periods, has been rated as a leading fitness trend, ranked between #1 and #3 in the annual survey of “Top 20 Worldwide Fitness Trends” since 2014, with no sign of weakening “popularity” (Thompson, 2019)
HIIT appears to deliver important physiological benefits
Little is known about why high-intensity interval programs have gained such popularity within the fitness industry, let alone, and perhaps most importantly, whether such a regimen encourages prolonged exercise1 behavior
Summary
HIIT, by definition, utilizes planned intensity and work to rest/recovery ratios in unlimited variations (see Laursen and Buchheit, 2019, Figure 1 for detail on intensity and design variability). A ratio defined as 1:1 (keeping in mind that numerous ratios can be delineated) may differ in duration (e.g., 30-s work: 30-s rest/recovery; 2-min work: 2-min rest/recovery) and exercise type (e.g., running; cycling; consider that body weight and resistance circuits often include multiple movements within a single HIIT session). These types of protocols are almost exclusively done in research. It is entirely possible these “interval-type” programs remain a popular form of exercise due to the autonomy in both level of exercise-intensity and rest/recovery, resulting in an affective quality (e.g., less unpleasant) that enhances affective associations toward exercise
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