Rethinking Exercise

 The major difference between high-intensity training (HIT) and low-intensity training (LIT) is that HIT cannot be sustained for very long, which requires a rest (Interval) making it HIIT. Low-intensity exercise does not require one to have to take a rest break at frequent intervals — but is exercise that can be sustained and prolonged indefinitely — like a cross-country bike ride. That person would not require a rest break every ten minutes — or they’d never get anywhere. But the high-intensity effort can usually not be sustained for very long because it usually means holding one’s breath for a maximal effort — which makes it anaerobic — or done without breathing.

The internal pressures involved with such maximal efforts are what causes a lot of damage and premature deaths among such highly-motivated athletes — like the proverbial “John Henry” who thought he could outrace a steam engine. Many of the “World’s Strongest Men,” also succumb to such stresses and retire quite young from such competitions, as well as many bodybuilders — including the Arnolds and the Ronnies. It is not that the spirit is not willing, but the body accumulates all these past traumas — and rather than becoming infinitely stronger, it inevitably takes a toll. That is not likely to be the case with low-intensity training — in which one can go on indefinitely — and so the body is telling you something in that.

However, just because one can sustain an activity indefinitely, is no guarantee that it will be productive enough to produce muscle growth and enhanced functioning. So one is aiming for that sweet spot at which one can sustain muscle growth and improved functioning for the rest of their lives — rather than the brief moment of glory followed by a lifetime in decline — which is the case in many former champions.

It may be that they suffer a few injuries along the way that makes no longer all-out efforts possible, and they’d be happy just to rehabilitate those injuries so they could resume a life without pain and disabilities — and that is the far superior role of lower-intensity but also productive exercise — which almost every highly-competitive athlete comes around to — but unfortunately, know no other way to train and exercise but the all-out to the next injury style.

At this point, many just give up and abandon exercise completely — or come back for high-intensity training that forces a prolonged rest, burnout and/or injury — before becoming completely discouraged. Their conditioning has been that they either have to force themselves beyond their limits each and every workout, or it is a waste of time to do anything less. But the less can be more — if it can be sustained over an entire lifetime, and I thing that is the paradigm people want — but are usually not offered that possibility.

It does require rethinking productive movements — beginning with the notion of the measurement of exercise at the heart — which defines high and low intensity. High intensity exercise is measured by achieving maximal heart rate — which is a danger zone and why that theoretical maximum was formulated — to protect those with heart problems from approaching those thresholds. Thus the concepts or “aerobic” and “cardio” also derive from that focus on heart function alone as the measure of effectiveness. But in the hands of the highly competitive, what was originally designed as maximums that should not be broached, was interpreted by the jocks as minimums that must be exceeded each and every time to be productive.

That is not true. The central focus in exercise is not how hard the heart works, but how effectively the muscle one wishes to develop is working — to increase the blood flow through that area — which is the circulatory effect — that more sensibly, has to be measured at the extremities rather than at the heart — because that is the objective — to pump the blood to the farthest reaches of the body, and not just to the heart itself. The heart always gets all the blood — by design. But the muscles don’t — unless they are activated in the same manner as the heart — in alternately contracting fully and relaxing fully, which makes its an auxillary pump.

That muscle mass is about 30% of the body weight — as opposed to the one pound heart — which people think is erroneously pushing the blood singlehandedly throughout the body as well as lifting hundreds of pounds externally. What the body does, is use favorable leverage to perform such tasks — rather than the naive notion that one simply has to make the heart alone work harder and faster — until it fails completely, and that is not a desirable outcome. Instead, one wants to produce as much results as possible, at a slow and steady pace — which usually makes the difference over time.

Meanwhile, the high-intensity guys are usually resting — which is a hell of a way to get anything done — but that’s what they think they are doing. But as people get older and wiser, they recognize that if they can still move through a great range, they are way ahead of the game, and that more than increasing resistance over a decreasing range, is the quality of life and movement they want.

High and low intensity is inherently the wrong way to think about it — because the focus is on working the heart harder and faster — rather than whether the muscles of the body are working as the heart does — making the entire musculature dedicated to the circulatory effect — which produces the optimal health and all its benefits.