3 ms·
Why not switch every 60m? That'd be much better for concentration. How did you decide that 30m was optimal?
by frankzinger 8y ago
Why not switch every 60m? That'd be much better for concentration. How did you decide that 30m was optimal?
- superasn 8y agoIt's a very common formula recommended by a lot of physiotherapists. It's just a recommendation because the time I started it, I had a rather severe backache. I'm sure 60m is fine too if your back allows it. It depends on every individual i guess.