The 12-3-30 is a treadmill workout that's harder than it looks. Some people might prefer it to running, but it's no magic ...
In simple terms, the 30-20-10 workout involves 30 seconds of low-intensity activity, 20 seconds of moderate-intensity activity, followed by 10 seconds of high-intensity activity. And although we’re ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback