Concentric

Exercise that includes movement. While doing these exercises your muscles can be eccentric and concentric.

Exercise where you stay still and joints don’t move. While doing these exercises your muscles are concentric

- Slow oxidative fibers, longer distance, have power for hours.

- Aerobic metabolism produces long, slow contractions

- These fibers remain thin and light.

- Fatigue Resistant

- Fast Glycolytic fibers, shorter distance, run out of power quickly.

- anaerobic metabolism produce powerful contractions

- Fatigue Easily

- fibers naturally become big and heavy.

The primary muscle that is contracting in a movement

(opposite of the antagonist)

The muscle that is lengthening or relaxing in a movement

(opposite of the agonist)

the opposite of the hamstring are the _______

The capacity of the muscle to exert force with a single maximum effort. This develops fast twitch muscle fibers. 

The capacity of the muscle to exert force repeatedly over a period of time, while resisting fatigue. This develops slow twitch muscular endurance.

The process by which skeletal muscles contract. Our brains send an impulse down a nerve to the appropriate muscle fibers. 

Actin is the thin filament being grabbed and pulled to the center of the muscle by the thick filament

Myosin is the thick filament grabbing and pulling the thin filament to the center of the muscle.

always use proper technique when lifting weights

You don't always have to use spotters for heavy lifts

Its safe to lift with an injured muscle, joint, or bone

You always have to lift with collars on the bar