Interesting, not my experience at all. Maybe there's something unique about me that makes it work. Who knows...
Could be.
I strongly disagree here. Moderate intensity, high frequency is a formula for repetitive stress injuries. I see this all the time with joggers, and weight lifters. These people spend so much of their lives dealing with chronic injury they don't even question why they're constantly hurt
High intensity does push the body closer to it's edge, but this isn't necessarily unsafe as long as a person takes care of themselves and honors edges. Short duration and lower frequency gives the body more time to recover, and puts the body under much less strain overall, leading to fewer repetitive stress injuries.
Note I also said short duration. Essentially you cut from the intensity of HIT which allows you to increase the frequency. Injuries happen due to overtraining; you have to be smart and patient with exercising just as with everything else. More or less like you said, "this isn't necessarily unsafe as long as a person takes care of themselves and honors edges".
Maybe a more extreme example would help illustrate my reasoning. What do you think would be more effective in cold training:
1. Training once a week at I don't know, let's say -50C, and then spending the rest of the time recovering from frostbite and similar issues, or
2. Training every day in the week at -30C at which (hypothetically) one day is perfectly enough to recover and be ready to train again the next day.
On a personal note, before I started using the methods outlined in Body By Science I had back, knee and hip problems from years of moderate intensity, high frequency exercise (jogging, weight lifting, bodyweight exercises). After a little over a year all of those problems are gone. But of course to each their own, and it's always possible there's something unique about my body that makes these methods work, where they wouldn't work for anyone else.
That's great that it worked so well for your problems!
That's what I'm saying. And that what the high-intensity gurus in general are saying. And this statement jibes with my experience, and with the sorts of activities that ancient people used to develop their strong, fit bodies. Paleo people didn't exercise every other day, the occasionally participated in intense, brief periods of activity (moving heavy objects, running from predators, taking down large prey animals), and that's how they got to be strong and fit.
Doesn't quite fit with scientific findings. Just a few days ago I read something rather different
http://www.business-standard.com/article/pti-stories/ancient-humans-and-neanderthals-were-extreme-travellers-113031000220_1.htmlIt certainly wasn't brief periods of activity once a week.