Muscle Contractions

The type of muscle contraction where the muscle tenses but does not shorten.

• Isometric

• Isotonic

• Contraction

• Relaxation

When a muscle shortens under tension, it is called_______

• Isotonic eccentric contraction

• Isotonic concentric contraction

• Isometric concentric contraction

• Isometric eccentric contraction

When a muscle is under tension, it is not possible for it to be lengthening

• True
• False

Isometric exercises cannot build muscle.

• False
• True

As the athlete lowers the weights, his biceps undergo-

• Isometric concentric contraction

• Isotonic eccentric contraction

• Isometric eccentric contraction

• Isotonic concentric contraction

As this athlete jumps into the air, his quadriceps undergo-

• Concentric contraction

• Eccentric contraction

• Isometric contraction

When a muscle in under tension, it has to be shortening or lengthening, otherwise it isn't under tension.

• True
• False

During the upward phase (pressing) which is undergoing concentric contraction?

• Biceps

• Triceps

• Abdominals

• Quadriceps

During the downward phase of the front squat, which muscles are undergoing eccentric contraction?

• Quadriceps

• Hamstrings

• Abdominals

• Deltoids

During the downward phase of this squat, what muscles are undergoing isometric contractions?

• Quadriceps

• Hamstrings

• Abdominals

• Soleus