CH5: Adaptations to Anaerobic Training Programs Flashcards
the anaerobic energy system works in the absence of what?
oxygen
what are the two components of the anaerobic energy system?
alactic (phosphagen) and lactic (glycolytic)
resistance training adaptation - muscular endurance
increases for high power output
resistance training adaptation - aerobic power
no change (slight increase maybe)
resistance training adaptation - rate of force production
increases
resistance training adaptation - sprint speed
increases
resistance training adaptation - muscle fiber cross sectional area
increases
resistance training adaptation - capillary density
no change or decrease
resistance training adaptation - mitochondrial density
decreases
resistance training adaptation - myofibrillar density
no change
resistance training adaptation - myofibrillar volume
increase
resistance training adaptation - cytoplasmic density
increasess
resistance training adaptation - myosin heavy chain protein
increases
resistance training adaptation - stored ATP
increases
resistance training adaptation - creating, myokinase, PFK
increases
resistance training adaptation - lactate dehydrogenase
no change
resistance training adaptation - sodium potassium ATPase
increases
resistance training adaptation - stored creatine phosphate
increases
resistance training adaptation - stored glycogen
increases
resistance training adaptation - stored triglerides
may increase
the size principle states that motor units are recruited in an ascending order according to what factors?
recruitment thresholds and firing rates
once a motor unit is recruited more activation is required for it to be re recruited (T/F)
F
what type of recruitment is the exception to the size principle and how does it usually occur?
selective recruitment, at very high speed and power thresholds
why do all muscles get larger with heavy resistance training?
because of the size principle, when motor units are recruited in an ascending order based on their size all lower threshold units get activated as well (the big don’t just get bigger)
myotatic reflex
harnesses the involuntary elastic properties of the muscle and connective tissues and acts to positively increase force production without any additional energy
resistance training has been shown to increase reflex potentiation by how much?
19-55%
what tool commonly used to examine the magnitude of neural activation within skeletal muscle?
EMG (electromyography)
in what phase of training do neural adaptation predominate the athletes progress?
early training stages
cross-education
the phenomenon of increased strength in the contralateral resting muscle when doing unilateral resistance training (up to 22%)
in untrained individuals the force produced when both limbs contract together is lower than the sum of the forces they produce individually - what is this called?
bilateral deficit
in trained individuals the force produced when both limbs contract together is often greater than the sum of the forces they produce individually - what is this called
bilateral facilitation
hypertrophy
the enlargement of muscle fiber cross sectional area
hypertrophy involves an increase in the net accretion of what contractile proteins? and where does this occur?
actin and myosin in the myofibrils within a muscle fiber
what structural proteins are synthesized proportionally to myofilament changes that occur during hypertrophy?
titin and nebulin
the formation of muscular tissue
myogenesis
what is the sequence (3 parts) of protein synthesis?
water uptake, noncontractile protein synthesis, contractile protein synthesis
how many workouts approximately does it take to see significant changes in the CSA?
> 16
hyperplasia
increase in number of muscle fibers via longitudinal fiber splitting
athletes with a greater number of what type of muscle fibers have a greater potential for increased muslce mass?
fast-twitch, type II
what is the muscle fiber continuum from least oxidative to the most oxidative?
IIx, IIax, IIa, IIac, IIc, Ic, I in MHC (IIx, IIa, I)
what causes IIx fibers to become IIa fibers?
combination of high intensity resistance and aerobic endurance training
when does the IIx to IIa change occur in athletes?
early stages of the training program
what size of pennation angle accommodates greater protein deposition and therefore greater increases in CSA?
larger pennation angles
osteoblasts
the cells that form new bones
what do osteoblasts secrete and what do these secretions become?
proteins (primarily collagen), form a bone matrix and eventually become mineralized as calcium phosphate crystals (hyroxypatite)
periosteum
outer surface of the bone
spongy bone
trabecular
compact bone
cortical
what type of bone responds more rapidly to mechanical loading?
trabecular (because its softer)
the threshold stimulus that initiates new bone formation
minimal essential strain
how much force is the MES typically?
1/10 of the force needed to fracture bone
what is the most important consideration when trying to stimulate bone growth?
specificity of loading
osteoporosis
critically low levels of bone mass and BMD
exercise selection is critical for eliciting maximal what?
osteogenic stimuli (factors that stimulate new bone formation)
structural exercises
exercises with force vectors primarily through the spine and hip
what happens when a bone is pushed passed its limits of structural fatigue?
stress fractures
physical activity during adolescence and early adulthood elevates peak bone mass (T/F)
T
what is the primary structural component for all connective tissue?
collagen
what synthesizes and secretes precollagen?
fibroblasts
what does the strength of collagen come from?
the cross linking between adjacent collagen molecules
what substance in ligaments allows for a certain amount of stretch
elastin
where can connective tissue increase strength and load bearing capacity?
junction between tendon and bone surface, within the body of the tendon or ligament, in the network of fascia within skeletal muscle (just think of wherever collagen is)
tendon stiffness
force transmission per unit of strain (tendon elongation)
how does cartilage get supplied with nutrients?
diffusion through the synovial fluid, it lacks it own blood supply
cartilage that is found on the articulating bone surface
hyaline
cartilage that is very tough and found in intervertebral disks of the spine and where tendons attach to bone
fibrous
how long after heavy resistance training do anabolic hormone concentrations remain elevated for men?
30 minutes
acute anaerobic exercise has what effects on the cardio vascular system?
heart rate, stroke volume, oxygen uptake, systolic blood pressure and blood flow to active muscles
reactive hyperemia
when blood flow within muscle increases during rest period after a contraction greater than 20% of maximal voluntary contraction
rate pressure product (measure of myocardial work)
heart rate x systolic blood pressure
ventilatory equivalent
ratio of air ventilated to oxygen used by tissue
mean strength of untrained individuals can increase by how much over periods of anaerobic exercise of four weeks to 2 years?
40%
what is the benefit of having more type IIa fibers over type IIx fibers?
greater fatigue resistance at similar absolute force outputs
resistance training can increase fat free mass and reduce body fat by up to how much?
9%
long term decrement in performance due to the accumulation of training stress
over training
short term decrements in performance
overreaching / function overreaching (FOR)
how long does it take to recover from functional overreaching?
few days or weeks of rest
stagnation and decrease in performance that will continue for several weeks or months
non functional overreaching (NFOR)
what is the condition more severe than NFOR that can last for upwards of 6 months and potentially ruin an athletes career?
overtraining syndrome (OTS)
what are the two types of OTS and which one typically precedes the other?
sympathetic and parasympathetic, with sympathetic developing first but ultimately always leading to parasympathetic OTS
what type of overtraining has been shown to increase cortisol and decrease resting luteinizing hormone and free testosterone concentrations?
volume related overtraining
decrement in performance and loss of accumulated physiological adaptations following the cessation of anaerobic training
detraining