Individual Differences and Their Implications for Resistance Training
· Longitudinal study – the changes in subjects over time, illustrate the development of a person’s physical abilities with proper training
Gender Differences in Anatomy and Physiology
Anatomical Differences
Strength and Power Output
How Training Stimulus Interacts with Maturity
· Motor development  - concerned with the changes in movement behavior as they occur over a person’s lifespan
Variation in Maturation Rate to Adulthood
Variation in the Onset of Puberty
Maximum Strength Development Follows Maximum Height and Weight Development
Motor Skills in early and Late Maturers
· Mesomorph – muscular, broad shouldered, thick chests, and narrow waisted
· Endomorph – rounder and more pear shaped
· Ectomorph – slender, tall, and more angular
Chronological Age Versus Biological Age
· Chronological age – developmental level in terms of an age in months or years
· Biological age – skeletal age, dental age, or sexual age (maturity is better gauged) 
· Tanner stages – (sexual development) onset of secondary sex characteristics
· Menarche – the onset of menstruation
Successive Movement Ability Phases
· Sensitive period – during person’s life span when development of given of motor skills is optimal.
· Stabilizing movement – place a premium a gaining and maintaining one’s equilibrium in relation to the force of gravity
· Locomotor movement – involve change in location of body relative to fixed point on the surface
· Manipulative movement  - involve motor actions that use an object
o Reflexive movement phase (in utero to 1 year)
§ Involuntary reactions to an environmental trigger (sucking, palmar grasping)
o Rudimentary movement phase (birth to 2 years)
§ Involves the development of voluntary inhibition of reflex movement and the beginnings of control over movement
o Fundamental movement phase (2-6 or 7 years)
§ Running, jumping (locomotor), throwing and catching (manipulative), and beam walking (stability) are examples of movements that can be developed through the initial, elementary, and mature stages of this phase
o Specialized movement phase (7-14 years and older)
§ Building on the competencies set in the fundamental movement phase, specialized sport, dance, and recreation movements can now be developed.
Typical Changes in Performance Associated With the Aging Process
· Osteoporosis – resulting loss of bone strength can become severe in the elderly, with fracturies occurring very easily.
Implications of Individual Training History for the Strength and Conditioning Professional
· Many children and adults in mechanized societies have never properly developed past the fundamental phases of movement
Individual Biomechanical Differences: Coaching the Execution of Exercises
Posture
Small and Large People
Machines and Individual Differences
· Specificity of exercise – training in a specific manner to produce a specific outcome
· General adaptation syndrome – non-specific, three-phase response (alarm, resistance, exhaustion) of the body to any stressor (e.g., the demands of exercise or a virus).
Practical Observations Regarding Specific Free-Weight Exercises
Long Torso
Pulling Off the Floor (Snatch, Clean)
Squat
Snatch
Clean and Jerk
Bench Press