READY
READY
Twenty seconds is the number the public health campaigns settled on. It is how long hands need under the tap to be actually clean, which is roughly two rounds of a chorus and considerably longer than it feels while you are standing there.
It is also the work interval in tabata, a step in most plank progressions, and the middle number in the 20-20-20 rule for screens: every twenty minutes, look at something twenty feet away for twenty seconds.
The tip: that eye rule works because of the distance, not the time. Twenty feet is roughly where the muscle that focuses your eye relaxes completely, so a glance out of a window does the job and a glance at your phone does not. Set this, then look at the furthest thing in the room.
Press start, or the space bar. The sound at the end is the point at this length; nobody watches the digits for twenty seconds.
It is the figure health services give, and the part people get wrong is coverage rather than time: backs of hands, thumbs and between the fingers. Twenty seconds is roughly how long doing all of that takes.
It is. Tabata is twenty seconds on and ten off for eight rounds, and the tabata page runs the whole pattern with a sound at every change rather than one interval at a time.
No permission prompt, no settings. The browser only needs one press of start before it will play audio, and that press is the one you were making anyway.