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Every interval training program is highly customized to the person using it. Because interval training programs can vary so much in intensity and length, they can be used by beginners as well as by professionals on a regular basis. They promote consistent progress when used thoughtfully and carefully as part of an exercise regimen.

Every interval training program is highly customized to the person using it. Because interval training programs can vary so much in intensity and length, they can be used by beginners as well as by professionals on a regular basis. They promote consistent progress when used thoughtfully and carefully as part of an exercise regimen.