Exam 1 Flashcards
define intensity
estimated as a percentage of 1 Repetition Maximum (RM)
what is the minimal intensity to increase strength
60-65% of 1 RM
what is the optimal intensity for maximal strength gains
80% 1 RM
define training volume
measure of the total amount of work performed.
Measured in joules
how do you estimate training volume
add together the number of repetitions performed in a time period
calculate the total amount of weight lifted and then calculate the total work performed
which is more important for affecting strength gains: total training volume, training frequency, or number of sets
total training volume
what is the optimal rest period for strength/power programs
several minutes between sets
what is the optimal rest period for high intensity/volume
less than one minute
what is the optimal rest period for aerobic power programs
less than 30 seconds
what does training at a fast velocity against light resistance and training at a slower velocity against heavy resistant result in?
velocity specific strength gains
define muscle action with regards to specificity
gains in strength are specific to the type of muscle action used in training (isometric, variable resistance, isokinetic)
define testing with regards to specificity
gains in strength are greater when a muscle is tested the same way it is trained
define muscle group training with regards specificity
each muscle group requiring strength gains or other adaptations to the training program must be trained
define energy source with regards to specificity
physical training may bring about adaptations of the metabolic systems predominantly used to supply the energy needed by muscles to perform a given physical activity
define progressive overload
practice of continually increasing the stress placed on the body as force, power, or endurance capabilities increase due to training
define progressive resistance
stress of resistance training is gradually increased as fitness gains are achieved with training
what is the chance of injury during resistance training
very slim
what are the common injuries of resistance training
muscle sprains and strains
who experiences the most accidental injury during resistance training
children
3 functions of spotters
- to assist the trainee with completion of a rep if needed
- to critique the trainees exercise technique
- to summon help if an accident does occur
purpose of training belts
helps to raise the intra-abdominal pressure, which supports the lumbar vertebrae from the anterior
for isometric training:
- maximal vs submaximal actions?
- # of muscle actions and duration
- effect on muscular hypertrophy
- effecont on joint angle specificity
- effect on motor performance
- use maximal actions for isometric
- 15 reps 3-5 seconds; 3x/week
- can result in hypertrophy but not as well as regular lifting
- very specific for joint angle
- some effect on motor performance
what athletes benefit from isometric training?
rock climbers
define Dynamic Constant external resistance training
(isointernal)
resistance lifted is held constant
describes exercises using free weights and weight training machines
define isotonic
traditionally defined as a muscular action in which muscle exerts a constant tension
for Dynamic Constant External Resistance Training:
- number of sets and reps
- training frequency
- effect on motor perforamnce
- effect on strength
- effect on body composition
- no real optimal number, it varies depending on goals
- 5x/week (central neural changes when doing other groups
- good transfer on motor performance
- very good improvement on strength
- minimal effect on body composition
define variable resistance training
involves equipment with a lever arm, cam, or pulley that varies the resistance throughout the exercise’s ROM
goal is to match the strength curve of the muscle
for variable resistance training:
- number of sets and reps
- effect on strength
- effect on motor performance
- effect on body composition
- # of sets and reps varies
- 30-50% change in strength (very large)
- motor performance can be good
- minimal effect on body comp
define isokinetic training
muscular action performed at a constant angular limb velocity
advantages of isokinetic training
- ability to exert maximal force throughout a large portion of an exercise’s ROM
- ability to train over a wide range of movement velocities
- minimal muscle and joint soreness
for isokinetic training:
- use of velocity spectrum training
- number of sets and reps
- training velocity and specificity
- effect on body comp
- effect on motor performance
- use different velocities to get ROM changes
- many different sets and reps work
- train the speed you will use for max benefit
- minimal effect on body comp
- fast training better than slow
what amount of reps per set is recommended for healthy adults for strength and power
8-12 to improve muscular strength and power
how many reps per set is recommended to improve strength
10-15
how many reps per set is recommended to improve endurance
15-20
what are the recommendations for the number of sets for different types of training
- 3 sets per muscle group results in greater strength gains than 1 set per muscle group
- 4 sets per muscle group results in optimal maximal strength gains in both trained and untrained individuals
what are the recommendations for training frequency
- a total body program 2-3 days/week for hypertrophy or local muscular endurance focused novices
- a total body program 3 days/week or a split body routine 4 days per week for intermediate trainees
- a split body routine 4-6 days per week for advanced lifters
what are the recommendations for training intensity
- dependent on training goal or desired outcome (strength, hypertrophy, power, muscular endurance)
- dependent on the training status of the individual (novice, intermediate, advanced)
what are the recommendations for training intensity for strength training
Novice/intermediate: 60-70% 1RM for 8-12 reps/set for 1-3 sets
advanced: 80-100% 1RM for multiple sets
what are the recommendations for training intensity for hypertrophy training
novice/intermediate: 50-60% 1RM for greater than 12 reps/set for more than 3 sets
advanced: 60-85% 1RM for 3-6 sets, 1-6reps/set
what are the recommendations fro training intensity for power training
novice/intermediate: 30-60% 1RM for 1-3 sets for upper body, 30-60% 1RM for 3-6reps/set for lower body
advanced: 60-85% 1RM for 3-6 sets for 1-6 reps/set
recommendations for training intensity for muscular endurance training
novice/intermediate: light loads for 10-15 reps/set
advanced: various loads for 10-25 reps/set
which is better: DCER or isometric
DCER
which is better: variable resistance or isometric
variable resistance
which is better: isometric or concentric isokinetic resistance
isokinetic
which is better: isometric or eccentric
eccentric
which is better: DCER or variable resistance
DCER
which is better: concentric or eccentric
concentric
which is better: DCER or isokinetic resistance
DCER
which is better: isokinetic or variable resistance
variable resistance
for resistance training, how large of a adaptation is possible?
up to 100%
how much adaptation is possible with aerobic training
20-30%
what is the main change during the first several weeks of resistance training
Neurological, the brain is getting used to the muscle movements
define bioenergetics
sources of energy for bodily functions, including muscle activity
what are the energy systems for anaerobic activity
Phosphocreatine system (ATP-PC)
Glycolysis
when is the ATP-PC system used
short duration high power high force events or resistance exercise. 1-10 seconds
how are muscular stores of ATP and PC replenished after use
replenished aerobically
can creatine supplementation enhance the PC pool in muscles
yes
what is the primary fuel source of glycolysis
only carbohydrate (glucose or glycogen)
no O2 is needed but it can result in a lactate accumulation with high intensity
how many times faster is glycolysis than aerobic metabolism
100x
what is the duration of the glycolysis system
10 seconds to 3 minutes
what is another name for aerobic metabolism
oxidative phosphorylation
what energy sources can the aerobic system use
carbs, fat (fatty acids) and protein
at rest, how much ATP comes from carbs and how much from fat
1/3 from carbs
2/3 from fat
as exercise intensity increases, what is the main fuel source used in the aerobic system
carbs
what is EPOC
excess post exercise oxygen consumption
replenish the anaerobic energy stores
how long does it take to restore the ATP PC intramuscular stores
half life is 20-48 seconds, for full replenishment: 2-4 minutes
how long does it take to replenish the glycolytic stores
depends on level of depletion and diet, but for light: 6-20 hours and heavy: 16-30 hours
how long does it take for the body to remove lactate
half life is 25 minutes
full: 75 minutes
complete removal up to 3 hours
light activity increases lactate removal 25-40% of VO2 max
what could high numbers of satellite cells result in
greater capability of more muscle hypertrophy
what are type I muscle fibers
slow twitch
what are type II muscle fibers
fast twitch
what is the action potential speed of type I muscle fibers
60-70m/s
what is the action potential speed of type II muscle fibers
80-90m/s
define the length-tension curve
- optimal length at which muscle fibers
- total amount of force developed depends on the total number of myosin crossbridges interacting with active sites on the actin
will prestretching a muscle increase the amount of force generated
yes
neural adaptations adaptations to exercise
- increased muscle fiber recruitment ability (smaller first)
- increased synchronization of motor units
- increased frequency of motor neuron firing
- decreased GTO activity
muscular adaptations to exercise
Hypertrophy
-increase in size of the individual muscle fibers
Hyperplasia
-increase in the number of muscle fibers (doesn’t actually happen)