Inertia - The tendency of a body at rest to remain at rest or a body in motion to remain in motion unless disturbed by an external force.
Law of inertia
A body in motion tends to remain in motion at the same speed in a straight line; a body at rest tens to remain at rest unless acted on by a force.
Law of acceleration ...
Momentum, inertia, mass, weight and force
Momentum: mass x velocity
Inertia: the resistance to acceleration - reluctance of a body to change whatever it is doing ...
At the beginning of a bench press, fast twitch muscle fibers are recruited to defeat inertia and the heavy load of the barbell.
The inertial sensors measure the acceleration of the foot pod more than 1000 times per second, and with specific algorithms is able to calculate foot angles and gait velocity.
For the occasional procrastinator who can generally overcome the inertia of resistance to change, her procrastination may be nothing more than a minor nuisance, a little mosquito in the tent of life that she can track down and swat away.
Most people have too much inertia to ever get moving on it, which I suppose can be said for any form of exercise. Sometimes they are reluctant to try something unknown. Just not understanding the risk-reward ratio holds others back.
"But wait," you protest. "I thought we were in daily battle against inertia. Now you're saying to take a day off? Won't my body wither or bloat or something?"
Ah, Grasshopper, so much to learn.
Human beings are capable of reaching breathtaking heights, but they also have a lazy side hard-wired into their natures. We need a push to overcome inertia. We need motivation.
It's like getting a rocket off the ground - it uses most of its fuel just launching off the pad, but once it's in the air and the inertia has been overcome, it can keep going with very little energy expenditure.
Weight and Resistance Training - The basic principle of weight or resistance training is to provide resistance to body at the initiating joint angle, as soon as the movement begins, when the muscle must trounce the inertia of the weight's mass.
The higher the weight, the more inertia it has and the bigger the momentum it generates, ...
As for heavy legs, don't just sprint from the sheets to the door. Get up 30 minutes before you leave the house to avoid what scientists call sleep inertia, the average time it takes your body's systems to wake up.
Stand on a box and use a moderate weight for a few explosive reps-that will build the pulling power you need to overcome inertia in the opening seconds of your deadlift. Afterward, you'll be able to get 360 with no problem.
Therefore the greater an athlete's strength is, the more explosive this initial phase of motion will be. However, once this initial inertia has been overcome less force and more speed is required to continue the movement and heavy strength training ...
 See also: Work, Back, Exercise, Upper, Fitness
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