Free Massage Therapist Kinesiology and Biomechanics Questions and Answers — Questions and Answers
Question 1: A client presents with Upper Crossed Syndrome, characterized by forward head posture and rounded shoulders. A massage therapist aiming to address the muscular imbalances would focus on stretching which pair of tight, facilitated muscles?
- Deep cervical flexors and rhomboids
- Pectoralis major and upper trapezius (Correct answer)
- Middle and lower trapezius
- Serratus anterior and infraspinatus
Correct answer: Pectoralis major and upper trapezius
Upper Crossed Syndrome involves a pattern of muscle imbalance where specific muscles become tight and others become weak. The tight and overactive (facilitated) muscles include the pectoralis major/minor and the upper trapezius/levator scapulae. Conversely, the deep cervical flexors and the middle/lower trapezius/rhomboids become weak and inhibited. Therefore, a corrective strategy would involve stretching the tight pectoral and upper trapezius muscles.
Question 2: A therapist instructs a client to actively contract their quadriceps while the therapist gently stretches the hamstrings. This technique, which facilitates greater lengthening of the hamstrings, is an application of what physiological principle?
- Autogenic inhibition
- Length-tension relationship
- Force-velocity curve
- Reciprocal inhibition (Correct answer)
Correct answer: Reciprocal inhibition
Reciprocal inhibition is a neuromuscular reflex where the contraction of an agonist muscle (in this case, the quadriceps) leads to the simultaneous relaxation of its antagonist muscle (the hamstrings). By having the client contract the quadriceps, the hamstrings are neurologically signaled to relax, allowing for a more effective and deeper stretch.
Question 3: During a postural assessment, a massage therapist observes a significant anterior pelvic tilt. This posture is created by a force-couple relationship between which two muscle groups?
- Hip flexors and lumbar extensors (Correct answer)
- Rectus abdominis and hamstrings
- Gluteus maximus and external obliques
- Adductors and quadratus lumborum
Correct answer: Hip flexors and lumbar extensors
An anterior pelvic tilt is produced by a force-couple where muscles on opposite sides of an axis work together to create rotation. In this case, the hip flexors (like the iliopsoas and rectus femoris) pull the front of the pelvis down, while the lumbar extensors (erector spinae) pull the back of the pelvis up. This synergistic action rotates the pelvis forward.
Question 4: Which of the following is an example of a closed kinetic chain movement for the upper body?
- Bicep curl with a dumbbell
- Throwing a baseball
- Push-up (Correct answer)
- Lifting a box off a high shelf
Correct answer: Push-up
In a closed kinetic chain exercise, the distal segment (hand or foot) is fixed and the body moves around it. During a push-up, the hands are fixed on the floor, and the torso moves. In contrast, the other options are open kinetic chain movements, where the distal segment moves freely in space.
Question 5: According to Newton's Second Law of Motion (Law of Acceleration), how does the amount of force a massage therapist applies relate to the client's tissue response?
- For every action, there is an equal and opposite reaction.
- The client's tissue will remain at rest unless a force is applied.
- The greater the force applied, the greater the acceleration or change in the tissue's state. (Correct answer)
- The total momentum of the system remains constant.
Correct answer: The greater the force applied, the greater the acceleration or change in the tissue's state.
Newton's Second Law of Motion states that acceleration is produced when a force acts on a mass; the greater the mass of the object being accelerated, the greater the amount of force needed to accelerate the object (F=ma). In massage, this means that a greater force applied by the therapist will produce a greater change (acceleration) in the state of the client's soft tissues, such as deforming the tissue or moving fluid.
Question 6: A client is most stable and balanced when their center of gravity is positioned in what relation to their base of support?
- Directly over the edge of the base
- As high as possible above the base
- Low and within the base of support (Correct answer)
- Outside and anterior to the base
Correct answer: Low and within the base of support
Stability is maximized when the center of gravity (the point where body weight is evenly distributed) is kept low and falls within the boundaries of the base of support (the area beneath the body). A wider base of support and a lower center of gravity increase equilibrium and reduce the risk of losing balance.
Free Massage Therapist Kinesiology and Biomechanics Questions and Answers
A client presents with Upper Crossed Syndrome, characterized by forward head posture and rounded shoulders.
A massage therapist aiming to address the muscular imbalances would focus on stretching which pair of tight, facilitated muscles?