Re: STRENGTH TRAINING & HEALTH

[Guest guest]

Mcsiff@... wrote:

> Interestingly, most of the activities of normal daily life and manual labour

> tend to be episodic, interval, muscle endurance or strength related in

> nature, rather than aerobic, so that the basic functional mode of humans

> would appear to be more anaerobic (intensity related) than aerobic (duration

> related).

This theory is also supported by the way that our metabolic machinery is

designed. The cellular bioenergetic processes of higher animals are

fundamentally nonoxidative, with oxidative pathways having evolved as a " shell " .

Case in point: the glycolytic pathway in muscle is essentially the same

'anaerobic' fermentation process

originating in single-cell eukaryotes and prokaryotes. As oxygen accumulated in

the atmosphere, 'aerobic' pathways evolved as an O2 detoxification mechanism -

the beauty of the system is that it simultaneously yields energy. Equally

interesting is the intracellular PC circuit, in which oxidative metabolism uses

a nonoxidative fuel

(phosphocreatine) to shuttle energy between sites of production and utilization.

The take home message: Any way you slice it, we're built for brief work

intervals!

SP

[Guest guest]

>The take home message: Any way you slice it, we're built for brief work

>intervals!

On the other hand, we can't survive, solely, on the glycolytic production

of energy. We must have a " base " of " aerobic " production. " Aerobic

exercise " enlarges that base.(among other things.)

Thaxton