Adaptations to Anaerobic Training Programs Flashcards
Anaerobic training
high-intensity, intermittent bouts of exercise such as weight training; plyometric drills; and speed, agility, and interval training
What the neural adaptations with anaerobic training?
Central Adaptations
Adaptations of Motor Units
Neuromuscular Junction
Neuromuscular Reflex Potentiation
Central adaptations: What increases when the level of force developed increases and when new exercises or movements are being learned?
Motor cortex activity increases
Central adaptations: many neural changes with anaerobic training place along what?
the descending corticospinal tracts
Adaptation of Motor Units: Maximal strength and power increases of agonist muscles result from what?
an increase in recruitment, rate of firing, synchronization of firing, or a combination of these factors.
With heavy resistance training, all muscle fibers get what? Why?
larger cuz they are all recruited in consecutive order by their size to produce high levels of force. However, advanced lifters can be unique!
In advanced lifters, the CNS might adapt by allowing these athletes to recruit some motor units not in consecutive order, recruiting the what?
the larger ones first to help with > production of power or speed in a movement
NMJ adaptations to anaerobic exs include the three following:
1) Increased area of the NMJ
2) More dispersed, irregularly shaped and a greater total length of nerve terminal branching
3) Increased end-plate perimeter length and area, as well as greater dispersion of ACh receptors with/in the end-plate region
Neuromuscular Reflex Potentiation neural adaptations:
Anaerobic training may enhance the reflex response, thereby, . . . .
enhancing the magnitude and rate of force development
Skeletal muscle adapts to anaerobic training primarily by . . .?
increasing its size, faciliatating fiber type transitions, and enhancing its biochemical and ultra-structural components
Muscular adaptations result in
enhanced muscular strength, power, and muscular endurance
Muscular adaptations include:
Muscular Growth (hypertrophy)
Fiber Size Changes
Fiber Type Transitions (continuum)
Structural and Architectural Changes
Other Muscular Adaptations:
Reduced Mitochondrial Density
Decreased capillary density
increased buffering capacity (acid-base balance)
Changes in muscle substrate content and enzyme activity
The process of hypertrophy involves both an increase in :
the synthesis of the contractile proteins actin and myosin w/in the myofibrils and an increase in the number of myofibrils within a muscle fiber.
the new myofilaments are added to what in hypertrophy?
the external layers of the myofibril, resulting in an increase in its diameter
Fiber size changes: resistance training results in
increases in both type I and II muscle fibers, but type II has greater increases in size than type I fibers
Structural and architectural:
Resistance training increases what?
myofibrillar volume, cytoplasmic density, SR and T-tubule density, and Na-K ATPase activity
Structural and architectural:
Sprint training enhances what?
Ca++ release
Structural and archietectural:
Resistance training increases what?
Angle of pennation
Connective Tissue Adaptations
General Bone Physiology
Anaerobic Training and Bone Growth
Principles of Training to Increase Bone Strength
Stimulate Bone Formation
Adaptations of Tendons, Ligaments, and Fascia to Anaerobic Training
Cartilage Adaptations to Anaerobic training
How does Trabecular bone respond differntly to stimuli than cortical bone?
Trabecular bone responds more rapidly to stimuli than does cortical bone
MES
Minimum essisential strain
MES is what?
the threshold stimulus that initiates new bone formation
MES is approx. what ?
1/10 of the force required to fracture bone
Muscle strength and hypertrophy gains increased the what? Which may result in a what?
force exerted on bone, which may result in a corresponding increase in bone mineral density (BMD) or the qty of mineral deposited in a given area of bone.
What are the 4 Principles of Training to Increase Bone Strength?
Magnitude of the load (intensity)
Rate of loading (speed)
Direction of forces
Volume of loading (# of repetitions)
How can Athletes stimulate bone formation?
4 methods
1) Use exercises that directly load particular regions of the skeleton.
2) Use structural exs’ to direct force vectors through the spine and hip and allow the use of greater absolute loads in training.
3) Overload the musculoskeletal sys, an progressively increase the load as the tissues become accustomed to the stimulus.
4) Vary exs selection to change the distribution of the force vectors to continually present a unique stimulus
Forces that reach or exceed a threshold bone formation stimulus initiate new what?
bone formation in the area experiencing the mechanical strain
Programs designed to stimulate new bone formation should have the concepts of what?
How should those exercises be selected?
specificity of loading, progressive overload, and variation; and the exercises selected should be structural and weight bearing.