Kinesiology: Anatomy and Movement Terminology

Overview: kinesiology, scope, and relevance

  • The lecturer introduces kinesiology as the study of human movement and function, linking sport, health, personal wellness, and broader societal issues.
  • Emphasis on how movement and physical activity impact personal health and quality of life, and how issues like plastics biohazards and public health relate to biomechanics, fitness, and well-being.
  • Real-world examples used to illustrate how inefficiencies in movement contribute to joint wear and pain over time, even in highly active individuals.
  • Cautions about lifestyle choices (e.g., footwear, activity levels) and the importance of adapting activity to age, body signals, and joint health.

Why kinesiology matters: health, performance, and society

  • Movement inefficiencies increase energy cost and joint wear; proper biomechanics protects joints (e.g., hips, knees).
  • Observations of how people move at different ages and activities (e.g., volleyball players, golfers) show how cumulative load and biomechanics affect health.
  • The role of genetics versus lifestyle: genetics set potential, but training, sleep, nutrition, and recovery shape outcomes.
  • The impact of modern research and equipment on performance: advances in small, portable measurement devices improve understanding of physiology and biomechanics.
  • Ethical and practical concerns: performance enhancement, safety, and the limits of the body when pushed too far without proper conditioning.
  • Warning against premature reliance on performance aids without underlying physiological readiness.

The personal application and lifelong health mindset

  • Core message: education should empower personal health decisions today to benefit tomorrow (e.g., quality of life into the 70s, 80s, and beyond).
  • Anecdote: an 80–90-year-old senior demonstrates that good gait, cadence, and breathing indicate maintained function, underscoring "use it or lose it".
  • Practical guidance: tune the body like a car—regular exercise, appropriate fueling, rest, and timely interventions to prevent major overhauls later.
  • The value of adapting activity with age (e.g., high-level athletes aging into fitness and rehabilitation contexts).

Anatomy and the study of movement

  • Anatomy is the study of structure and makeup of the human body; structure determines function and movement capability.
  • The body’s integrated system (bones, joints, ligaments, muscles, tendons) works together to enable movement; disruptions can lead to dysfunction.
  • Even everyday objects have anatomy analogies (e.g., a table’s components versus bones, joints, ligaments in the body).
  • Neurophysiology basics: movement starts with signals from the brain; early infant movement evolves with stimuli (light, touch, toys) that promote development.
  • Pathologies illustrate the tight link between structure and function (e.g., arthritis from joint wear, brain-related motor control diseases like Parkinson’s or MS).
  • When structures are damaged (e.g., ACL tear), functional capacity declines, and rehabilitation focuses on restoring movement patterns and joint stability.
  • In the context of sports injuries, rehabilitation aims to restore proper biomechanics and movement efficiency, not just strength.

Anatomical position: a reference framework

  • Anatomical position defined: erect posture, facing forward, arms hanging at sides, palms supinated (thumbs pointing outward), legs straight, heels and feet parallel.
  • Supine: lying on the back; prone: lying face down. Terms like semi-supine/semiprone describe intermediate positions.
  • The anatomical position serves as the reference frame for directional terms, movements, and planes.

Planes of the body (movement reference frames)

  • Planes segment the body into sections and help describe movement:
    • Sagittal (midline) plane: divides body into left and right halves. The midsagittal plane is the exact midline; general sagittal planes can be offset laterally.
    • Coronal (frontal) plane: divides body into front (anterior) and back (posterior) portions.
    • Transverse (horizontal) plane: divides body into upper and lower portions.
  • Reference to cross-sectional imaging (CT) helps visualize planes and slicing through the body.
  • Movements are described relative to these planes; attempting a movement that cuts through a plane would “break” the plane concept and is not how the movement is defined.

Directional terms and regional terminology

  • Key directional terms (based on anatomical position):
    • Medial vs. Lateral: medially toward the midline; laterally away from the midline.
    • Proximal vs. Distal: proximal closer to a reference point (typically the trunk); distal farther from that point.
    • Superior vs. Inferior: superior above a reference zone; inferior below it.
    • Anterior (ventral) vs. Posterior (dorsal): anterior/front of the body; posterior/back of the body.
  • Examples to illustrate usage:
    • Lips are anterior to teeth; teeth are posterior to lips.
    • The tongue anatomically sits posterior to the teeth in the oral cavity; the anterior part of the tongue is, in contrast, more anterior.
    • Clavicle is superior to the rib cage; kidneys are inferior to liver.
  • Zoological terms occasionally appear (e.g., caudal toward the tail, cephalad toward the head) but are less common in human anatomy discussions.
  • Planes and directions are defined with reference to the anatomical position; consistent reference prevents confusion during analysis.

Planes, planes, and movements in practice

  • The three planes correspond to typical movement directions:
    • Sagittal plane movements: flexion (decreasing angle, e.g., elbow flexion) and extension (increasing angle back toward anatomical position).
    • Frontal (coronal) plane movements: abduction (moving away from midline) and adduction (returning toward midline).
    • Transverse (horizontal) plane movements: rotation (internal/medial and external/lateral rotation); cutting across the body’s midline engagements.
  • Examples of plane-specific movements:
    • Jumping jacks: abduction of limbs in the frontal plane.
    • A forward arm raise (shoulder flexion) occurs mainly in the sagittal plane.
    • A pure twisting motion of the torso or shoulder rotation occurs in the transverse plane.
  • Mobility and integrity of joints rely on proper alignment, muscle balance, and neural control to keep movements efficient and safe.

Functional anatomy: origin and insertion; movement efficiency

  • Muscles attach at two primary points:
    • Origin: the fixed or proximal attachment (where the muscle starts).
    • Insertion: the distal attachment (where the muscle ends and acts on the bone).
  • Movement results from muscle contraction causing bone segments to move around joints; timing and coordination are crucial.
  • Inefficient movement patterns contribute to joint wear (e.g., overpronation altering foot mechanics, leading to ankle/knee/hip issues).
  • Example: a hip problem in a former varsity athlete may reflect long-term cumulative loads and positional faults (e.g., bow-legged tendencies, weight gain, joint degeneration).

Key movement concepts: flexion, extension, abduction, adduction, hyperextension

  • Flexion: decreasing the angle between body parts (e.g., elbow flexion).
  • Extension: returning toward the anatomical position after flexion; hyperextension occurs when movement goes beyond anatomical position.
  • Abduction: moving a limb away from the midline (frontal plane).
  • Adduction: returning a limb toward the midline (frontal plane).
  • The fetal position describes total body flexion; full extension corresponds to the anatomical position.

Practical implications for health, aging, and performance

  • Aging and activity: maintaining flexibility and strength is essential to preserve function; loss of elasticity and muscle strength increases injury risk.
  • Gluteus medius strength is a key factor in pelvic stability and single-leg stance; weakness can lead to energy inefficiency and hip dysfunction.
  • Foot mechanics (e.g., overpronation) influence ankle, knee, and hip joints; footwear choices matter for biomechanics.
  • Injury examples illustrate the need for rehabilitation that restores proper movement patterns rather than focusing only on strength in isolation.
  • Modern biomechanics research uses smaller, portable equipment to analyze movement and physiology, enhancing understanding of performance and rehabilitation.

Career paths and applications of kinesiology

  • Diverse career options across sectors:
    • Worksite health and wellness programs; in-house fitness and coaching programs in workplaces.
    • Clinical roles: athletic therapy, physical therapy, occupational therapy, massage therapy, prosthetics/orthotics, vocational therapy.
    • Medical/science pathways: medicine, sport medicine, medical sciences.
    • Coaching, teaching, and sport management roles; integration with sports programs in schools and organizations.
    • Hospital and clinical program management; directing rehabilitation and wellness programs for patients.
    • Non-clinical roles: pharmaceutical sales, health education, and public health initiatives.
  • The field emphasizes understanding human function, biology, and behavior to optimize health outcomes and performance.
  • The degree can lead to opportunities in pharmaceutical contexts by explaining body function and dysfunction, which informs medication development and use.

How this course will unfold: foundations and proceeding sections

  • The course will begin with human anatomy as a foundation; it will skim extensive content due to time constraints and course scope (e.g., >200200 bones and >600600 muscles).
  • The aim is to build a practical language for describing structure and movement (anatomical position, planes, directional terms, origin/insertion).
  • Future sections will delve into exercise physiology, biomechanics, nutrition, and sociocultural/behavioral/philosophical aspects of sport.
  • Emphasis on developing the ability to ask questions and conduct inquiry: research starts from asking where, what, and why movement patterns emerge.
  • Interdisciplinary relevance: connections to medicine, paramedicine, occupational health, and athletic training.

Core takeaways for exam preparation

  • Always anchor movement analysis to the anatomical position as the reference frame.
  • Know the three primary planes and the typical movements associated with each:
    • Sagittal: flexion/extension
    • Coronal/Frontal: abduction/adduction
    • Transverse: rotation (internal/external)
  • Distinguish between proximal/distal and medial/lateral with clear reference points.
  • Distinguish anterior/ventral and posterior/dorsal; understand where terms apply in the anatomical position.
  • Understand the concepts of origin and insertion for muscles and how they relate to movement.
  • Recognize factors that affect movement efficiency and joint health (biomechanics, footwear, aging, conditioning, weight load).
  • Be aware of the broad range of kinesiology career paths and how a foundational understanding of anatomy and movement informs practice across settings.
  • Remember practical examples (e.g., ACL function, knee/hip wear, overpronation, and the impact of sustained activity like golf) to illustrate principles in real life.

Quick reference: common terms recap

  • Anatomical position: erect, facing forward, arms at sides, palms supinated, feet together and parallel.
  • Planes: sagittal, coronal/frontal, transverse.
  • Movements: flexion, extension, abduction, adduction, rotation, hyperextension.
  • Terms: proximal/distal, medial/lateral, superior/inferior, anterior/ventral, posterior/dorsal, supine, prone.
  • Key concepts: origin vs insertion; bone/joint alignment; joint lubrication and synovial joints; neuromuscular control of movement.

End of notes

  • Continue to review anatomical terms, identify examples in everyday movement, and practice describing movements using planes and directional terms to build fluency for exams.