HIIT Timer / Interval Timer vs OTTO SPORT

It's a timer app suitable for HIIT training. All features are completely free to use. Features: - Quick start-up and comfortable operability. Create unlimited timers. - Freely set warm-up, ready, workout, interval, cool-down minutes / seconds, and set counts. - Customize colors, texts, background notifications, sounds, speeches, vibrations, screen flashes and icon badges. - Dark mode - All free URL scheme: hiittimer:// --- * High-intensity interval training High-intensity interval training (HIIT) is a training protocol alternating short periods of intense or explosive anaerobic exercise with brief recovery periods until the point of exhaustion, which thereby relies on "the anaerobic energy releasing system almost maximally." * Procedure HIIT exercise sessions generally consist of a warm up period followed by repetitions of high-intensity exercises separated by medium intensity exercises for recovery, then a cool-down period. The high-intensity exercise should be done at near maximum intensity. The medium exercise should be about 50% intensity. The number of repetitions and length of each depends on the exercise, but maybe as little as three repetitions with just 20 seconds of intense exercise. The specific exercises performed during the high-intensity portions vary. Most of the research on HIIT has been done using a cycling ergometer, but other exercises like a rowing ergometer, running, stair climbing and uphill walking can also be effective. There is no specific formula for HIIT. Depending on one's level of cardiovascular development, the moderate-level intensity can be as slow as walking. A common formula involves a 2:1 ratio of work to recovery periods, for example, 30–40 seconds of hard sprinting alternated with 15–20 seconds of jogging or walking, repeated to failure. The entire HIIT session may last between four and thirty minutes, meaning that it is considered to be an excellent way to maximize a workout limited by time constraints. Use of a clock or timer is recommended to keep accurate times, the number of rounds, and intensity. Quoted from: https://en.wikipedia.org/wiki/High-intensity_interval_training

The OTTO SPORT mobile app is built for the people who make youth sports happen. It brings clarity to busy schedules, keeps teams connected, and helps seasons run smoothly—whether you’re organizing the league, coaching from the sidelines, or supporting from the stands. Members can access teams, rosters, schedules, assignments, and messaging tools in one reliable place. The OTTO SPORT app is permission-based. Administrators control access, and only teams with permissions enabled will be visible in the app—ensuring the right people see the right information, at the right time. What You Can Expect - Seamless integration with the OTTO SPORT sports management system, including teams, rosters, and schedules (games, practices, assignments, and other events) - Easy schedule management for parents and athletes—so practices, games, and assignments are always clear and up to date - Built-in messaging between admins, coaches, parents, players, and officials - Access to households, profiles, registration orders, and payments - A clean, focused interface with system-wide light and dark mode - Administrative control over team visibility - Referee and game official schedules and assignments From planning to game day and everything in between, OTTO SPORT: is a smarter, steadier partner—keeping everyone aligned, informed, and moving the season forward.