Which of the following statements is true of ballistic stretching?

• It is the most effective and widely used technique of stretching in injury rehabilitation of sore or strained muscles.

• It involves passively stretching a muscle by placing it in a maximal position of stretch, or its endpoint where there is resistance to stretch, and holding it there for an extended time.

• It involves a bouncing movement in which repetitive contractions of the agonist muscle are used to produce quick stretches of the antagonist muscle.

• It is highly effective in improving range of motion because the forces that are generated during stretching are unlikely to lead to any sort of muscle injury.

which of the following involves a muscle contraction in which the length of the muscle is changing while the contraction is performed at a constant velocity?

• Isometric exercises

• Isotonic exercises

• Isokinetic exercises

• Isodynamic exercises

Which of the following involves passively stretching a muscle by placing it in a maximal position of stretch, or its endpoint where there is a resistance to stretch, and holding it there for an extended time?

• Static stretching

• Active stretching

• Dynamic stretching

• PNF stretching

Which of the following statements is true of isokinetic exercises?

• In isokinetic exercises, the muscle is shortened and lengthened through a complete range of motion.

• In isokinetic exercises, resistance is given at a fixed velocity of movement with accommodation resistance.

• Isokinetic exercises have been widely used as a training and conditioning technique and have also gained popularity as a rehabilitation tool

• The key to isokinetic exercises is the resistance rather than the speed and which resistance can be moved.

A dynamic worm-up that is usually used to prepare for physical activity can be done in _________.

• not more than 10 minutes

• as little as 5 minutes or as long as 20 minutes

• not less than 15 minutes

• as little as 20 minutes or as long as 30 minutes

Which of the following involves a muscle contraction in which the length of the muscle remains constant while tension develops toward a maximum force against an immoveable resistance?

• A progressive resistance exercise

• An isotonic exercise

• An isometric exercise

• A plyometric exercise

Which of the following terms is defined as the ability to generate force rapidly?

• Muscular endurance

• Power

• Muscular strength

• Torque

Which of the following statements is true of isometric exercises?

• They are unlikely to produce a spike in blood pressure.

• They are commonly used in injury rehabilitation or reconditioning.

• They are unlikely to result in the Valsalva effect.

• They are the most commonly used technique for improving muscular strength.

If the intensity of an activity is low enough that the cardiovascular system can supply enough oxygen to continue the activity for long periods, the activity is an _________.

• aerobic activity

• anaerobic activity

• Isotonic activity

• isometric activity

A bicep curl using a dumbbell is a example of a(n) ____________.

• Isometric exercise

• Isotonic exercise

• Isokinetic exercise

• Proprioceptive neuromuscular facilitation technique