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>I am not sure what *high intensity* resistance exercise is, weight lifting??
Increasing the ntensity means doing more than you usually do: moving faster
longer or over steeper terrain, lifting more, lifting through more
repetitions...
To increase muscle mass or muscle fitness (which translates over time into
total body/mind fitness imrovements) you need to provide your muscle with
more work to do. The human body is conservative; it will not produce more
ability to live, run, climb, jump, etc. than you demand of it on a regular
basis.
But too-rapid an increase in any kind of intensity can foster injury, so
build yur intensity slowly. Every other time you hit the Nordic Track, for
instance, add a little extra time, work at a faster pace, increase the
resistance. That'll give yourr muscles the message to grow bigger,
stronger, endure longer - whichever feature your workout is designed to
develop. And why not try other exercise, too - walking, running, lifting,
climbing...as with food, we humans are adapted to thrive best if we have
great variety in our exercise...
Peg - in the Zone, but lurkingon this list
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