"I'm for it!" <[email hidden]> wrote in message
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Quoted message said:Quoted message said:Well, vaguely I want to improve my cardiovascular system.>
Then Long Slow Distance will do it, and with minimal chance of injury.
Well, that's not quite true. Running at a sprint tends to put a lot
less impact through the joints than jogging. The slower you go the more
impact the average exerciser puts into their legs.
Robert, being of heavier-than-optimal weight, and having admittedly worn
knees, I suggest you be very conscious of two things:
1) your shoes. Buy a shoe for its fit and construction, not price or style.
buy them only from a runners-specific store - general athletic stores (malls
especially!) are [censored]. Replace them every 500 miles, and don't wear your
workout shoes around the house or they'll lose their cushioning prematurely.
2) the impact on your legs. At a sprint, your legs naturally push your body
forward from step to step as hard as they can to keep maximum speed. At a
jog, many runners tend to maintain that pop in their step, but direct it
upward instead of forward. They slow down their cadence, but continue to
take fairly large steps. The result is a motion that uses the same muscles
(makes it feel 'natural' and relaxed), but the upward-downward motion is a
joint killer. It's also inefficient, in that it wastes energy. You may
need to teach yourself how to properly run slower - to stop the bouncing.
Bouncy running can easily double or quadruple the loads on your joints.
The correct way to slow down is to shorten your strides and use more of a
shuffling motion - and keep the pace of your feet moving faster.
How do you know if you're bouncing too much? Basic things: jog
alongside a brick wall or fence and look at an a eye-level horizontal
reference. If you see more than an inch of bounce, you probably bounce too
much. Shorten and quicken your strides without changing pace (you'll need a
more shuffling motion to do this) so that it's smooth, silent, and relaxed.
It will not feel natural for more than a minute, as different muscles will
get tired and your body will want to revert to its old habits. IMHO, you
should force through this now, because your muscles are more compliant to
change and because you're at the most vulnerable to injury. It will take a
couple of weeks where you forget about intensity and focus on form whenever
you run - after 15-20 days it will be more natural.
As for the workouts, I agree with the others who said longer runs.
Changing the pace as you had been is still a valid workout, we call these
interval workouts or fartleks. Just don't do them every day. The sprints
are a good idea - I liked to do them all at the end on a soft surface - it
loosens my muscles and helps maintain my ability to run fast. But for now,
focus on running form, and then on slowly increasing distance. Don't add
more than 10% total running mileage per week, and try to vary the distance
from one day to the next.
Dave