Q: Is lifting weights mechanical energy

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From chemical energy to mechanical energy and heat energy.

That is what an electric motor does. A relay also does this, as does a big lifting electromagnet in a junkyard.

Because lifting weights requires actual weights it puts resistance on the muscles to make them stronger bigger and more durable unlike stretching, these two are completely different from each other.

The efficiency is (output energy)/(input energy) = 340/400 = 85%

If an object has kinetic energy, then almost BY DEFINITION it has mechanical energy. "Mechanical energy" is the sum of kinetic energy and potential energy.

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Riding a bike, running, lifting weights

1: Humans intake chemical energy in the form of food 2. when blood flows in to the tissues, energy and heat is released in tissues. 3. when lifting weights, this energy is used to perform work(lifting weights) and some amount is also lost as heat. 4.When weights are lifted, the energy is stored as potential energy. 5.when weights are lowered, muscles do work against gravity..this energy is used to increase the temp of muscles, part of it results in muscle wear.

Lifting weights

Lifting weights is an exercise

potential mechanical energy

From chemical energy to mechanical energy and heat energy.

Lifting weights = subject builds muscles = predicate

it just means lifting weights that is not on a machine like using a curl bar

Chemical energy is converted to mechanical and heat energy

This answer depends on your diet. If you continue to consume the same amount of calories after you quit lifting, then yes you may get fat. Lifting weights burns calories and muscles need these calories to build more muscle. If you quit lifting weights, your body no longer needs as many calories. Also, your metabolism will slow after you quit lifting weights. Now, if you quit lifting weights and also cut calories, you will not get fat.

Lifting wieghts

it's the feeling you get after lifting weights where everything feels lighter and werid. not only after lifting weights but also putting leg weights on etc.