The exercise that involves muscle contraction with resistance is called?

Appeared in: AIIMS Bhuvneshwar NO- 2018

Explanation

Isokinetic exercise is defined as muscle contractions performed against a variable resistance at a constant speed.
The term itself combines 'iso' (same) and 'kinetic' (motion/speed), highlighting its key feature: movement at a constant velocity.
This type of exercise requires specialized equipment (like a Cybex or Biodex machine) that adjusts its resistance to match the force the user applies throughout the range of motion.
It is highly effective for strengthening specific muscle groups in a controlled manner, which is why it's a staple in physical therapy and rehabilitation.

Option B: Aerobic exercise (e.g., running, swimming) is defined by its reliance on oxygen to meet energy demands. Its primary goal is to improve cardiovascular and respiratory fitness, not to work against a specific, controlled resistance.
Option C: Isotonic exercise involves muscle contraction against a constant load, resulting in movement (muscle shortening or lengthening). While it involves resistance (like a dumbbell), the resistance is fixed, and the speed of movement is variable.
Option D: Isometric exercise involves muscle contraction without any visible change in joint angle or muscle length. The muscle generates force, but there is no movement.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Types of exercise based on muscle contraction as background academic context rather than a clinical decision trigger.
Isokinetic exercise is a cornerstone of rehabilitation after musculoskeletal injuries, such as ACL reconstruction or rotator cuff repair, because it allows for safe, targeted strengthening without overloading healing tissues.
Nurses can educate patients on the different types of exercises prescribed by physical therapists, reinforcing the purpose and technique to ensure compliance and prevent injury.
What if a patient in rehab reports pain during isokinetic exercise? The nurse should instruct the patient to stop immediately and report it to the physical therapist. The resistance on the isokinetic machine can be adjusted, but pain may indicate inflammation or improper form that needs assessment.

How to Approach the Question

This is a factual recall question that tests your knowledge of exercise physiology definitions.
First, identify the key terms in the question: 'muscle contraction' and 'resistance'.
Next, systematically define each option:
Isokinetic: 'Same speed'. Muscle contracts against a machine's variable resistance at a constant speed.
Aerobic: 'With oxygen'. Focuses on cardiovascular endurance.
Isotonic: 'Same tension'. Muscle contracts and moves a constant weight.

Concept Tested & Keywords

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E6 Nursing Fundamentals Taylor p. 314-316

E6 Nursing Fundamentals Potter Perry 12e Part 4 p. 99-101

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