CH 2 Tempo Builder
0:00 / 34:00
Ready
8:00
Next: Tempo
Start
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This browser has no on-device speech voice, so the workout runs on tones and the screen. Online voices are skipped so the calls are never sent anywhere.
The player needs JavaScript for sound and timing. The running order below still shows every part.
Before you press start
Turn the volume up and the ringer as you like it; headphones work best.
Keep this page open with the screen on; it stays awake where your browser allows it. If the phone locks or you switch apps, most phones pause the sound.
Pause any time; the clock waits for you.
Every sound is made on your device: the tones by your browser's Web Audio, the voice by an on-device speech voice (the player skips online voices). No recordings of people.
Training information, not medical advice. Check with your doctor before hard training; stop if you feel chest pain, dizziness, faintness or unusual breathlessness.