This is your 40/10 HIIT timer — simple, intense, and built to keep you moving with zero downtime. Each round hits fast, powered by upbeat HIIT workout music and clear voice cues so you always stay in sync. The format keeps everything sharp and efficient: 40 seconds ON: push power, pace, and form 10 seconds OFF: quick reset, breathe, stay ready Multiple rounds: perfect for building endurance and speed Just press play, follow the voice, and let the music carry your rhythm. 🔥 What you can use this for HIIT circuits Tabata-style workouts Full-body cardio At-home training Warm-ups or finishers Jump rope, bodyweight drills, or mixed exercises Whether you’re hitting burpees, lunges, squats, push-ups, sprints, or shadow-boxing — this timer keeps your session structured and motivating. 🎧 Why 40/10 works so well 40 seconds is long enough to build intensity, 10 seconds is short enough to stay in the zone. This ratio is ideal for: increasing stamina boosting heart rate burning calories quickly improving consistency in each round The music adds drive. The voice cues keep the timing clean. You focus on movement — the timer handles the rest. 💬 Hit play, follow the beat, and crush every 40/10 round.