1 Flashcards
Anaerobic or Lactate threshold
the instant when the body must switch from forming energy through the aerobic system and must begin to use the anaerobic pathways to create energy. Increases as person becomes more fit
Maximal oxygen uptake
VO2 max - the most oxygen a person uses when he or she is exercising as hard as possible. Measures the ability of the obdy to make ATP through the aerobic system. As a perosn becomes more fit, he or she will be able to take in and use more oxygen and thus make mor ATP aerobically.
EPOC
excess post - excersie oxygen consumption is how much oxygen is breathed in jsut after strenusous activity is finished.
One Met
3.5 ml of oxygen per kilogram of body weight per minute. 1 met is the rate at which the average person uses oxygen when not exerting himself per pound of bodyweight.
Hepatic portal system
blood draining the slimentary tract (intestines), pancreas, spleen, and gall bladder does not return directly to the systemic cirulation, but is relatyed by the heaptic portal system of veins to and through the liver.
Lining of the heart
Endocardium (lining coat) Myocardium (middle coat) Epicardium (external coat of visceral layer)
Average blood volume
5 or 6 liters
Growth hormone
Induces precuror cells to differentiate and secrete insulin-like growht factor 1 which stimulates cell division, stimulates protein synthesis
Insulin
stimulates fetal growth, stimulates protein synthesis
Cortisol
inhibits growth, stimulates protein catabolism
HDLs
High density lipoproteins considered good cholesterol, these lipoproteins help to clean the walls of the blood vessels and thus prevent atherosclerosis. Optimal level is more than 160 mg/dL
LDLs
low density lipoprotiens, bad cholesterol. deposits form on the walls of the blood vessels and thus increase the risk of atherosclerosis. Optimal level is less than 100 mg/dL
NSCA water intake
- drink 1 half-liter of water two hours before each workout (500 ml or 17 fl oz)
- drink plenty of room temperature water during the workout
- someone doing endurance activites that last more than an hour should drink fluids that have added carbohydrates and electrolytes
Carbohydrate loading
For 3 days before an athletic event, eat a diet composed of 60-70% carbohydrates. After a workout, eat 50 gram sof low fat carbs with a high GI number immediately after fininshined. Then eat another 50 grams of similar GI level food 2 hours later
Fats can only be used for energy when?
in the presence of oxygen
Thermic effect of food
approximately 10% of the food’s calorie count
Normal production of water in a human
2500-2700 ml per day
the average adult is composed of how much percent water?
55-60%
How many liters of water per day?
2-3 liters
Amino acids?
At least 9 amino acids must be found in your diet and cannot be made by your body
Complete protein
Contains all 8 amino acids; meat cheese and poultrt
incomplete protein
plants, nuts, grains, and legumes.
enzymes involved in protein digestion
chymotrypsin, tryspins, carboxypeptidase, and pepsin
NSCA protein intake
15% of calories to be protein
byproducts of protein breakdown?
uric acid, nitrogen, and hydrogen
Water Soluble Vitamins
Vitamin c - helps w/ uptake of iron and cell membrane
Vitamin b1 - thiamine helps with muscle recovery and nerve function
vitamin b2 - riboflavin
vitamin b6, b12, folic acid, and niacin
Fat soluble vitamins
vitamin a d e k
Transtheoretical model of change
Stage 1 - precontemplation stage, person is not interested at all in exercise
stage 2 - contemplation stage, person is a little interested in exercise
stage 3 - preparation phase, person is preparing to give exercise a try
stage 4 - action phase person is trying exercise, this is the vulnerable stage, for the first 6 months
stage 5 - maintenance stage - person has made the activity a habit and continues it
SMART goals
Goals that are Specific Measurable action - oriented realistic and relevant timed
Anabolic steroids
chemicals in a lab that resemble testosterone, they can make muscles bigger and stronger but can lead to increased anger, larger breasts in men, smaller breasts in women, heart problems, cancer, and infertility.
Other side effects - liver tumors, jaundice, fluid retention, high blood pressure, severe acne, and trembling.
Human Growth Hormone
a natural chemical made by the body that lowers fat and makes muscle, used in large quantities, it can result in the feet, hands and face getting larger, skin getting thicker retaining fluids, inefficient use of insulin, and high blood pressure.
Caffeine
the most important effect of caffeine may be in mobilising fatty acids, which can then be used as a fuel, sparing the glycogen stores.
What does ATP do?
- Aids in ATP resynthesis
- maintains ATP/ADP ratios
- In combination with phosphorous buffers the accumulation of H+ (lactate acid)during periods of intense exercise
- facilitates high energy phosphate transport from the mitochondria to the contractile proteins of skeletal muscle
Scapular retraction
also called scapular adduction. the shoulder girdle moves backwards and the scapulae are pulled together. Uses the middle trapezius
scapular protraction
also called scapular abduction, the shoulder girdle is moved forward and the scapulae are pulled apart
Scapular upward rotation
the scapula turns upward as the clavicles are elevated (arms lifted in front of the body.
Rhomboids
are under the trapezius and are involved in scapular retraction, downward rotation and shoulder shrugs
4 rotator cuff muscles
sits
supraspinatus - shoulder abduction
infraspinatus - shoulder external rotation
teres minor - shoulder external rotation
subscapularis - shoulder internal rotation
Brachialis
under the bicps brachii involved in elbow flexion
anconeus
lies behine the elbow and is involved in elbow extension
Pronator quadratus and pronator teres in the forearm
involved in radioulnar pronation (rotating forearm to palm down position)
Linear Momemtum
the larger the body and the faster it is moving, the greater its momentum. Calculated as mass x velocity
Angular momentum
Moment of Inertia (I) x angular velocity
The magnitude of the moment of inertia depends on 2 factors
1. body mass
2. distribution of the mass relative to the axis of rotation.
How do you change momentum?
a mechanical impulse must be applied. Impulseis the product of force x time
Torque
Angular motion, aka moment of force (M). The effect of a force that tends to cause rotation or twisting about an axis. So torque refers to the twisting action of a force
torque = force x movement arm
T = F x d
Moment arm
the perpendicular distance from the fulcrum (axis) to the line of force action
Lever
a rigid structure, fixed at a single point (fulcruum or axis) to which two forces are applied. A bone moving about its axis of rotation
1st class lever
the fulcrum is located between 2 forces. Ex. extending the elbow against resistance
2nd class lever
the foot during plantar flexion against resistance as when someone is standing on the toes.
3rd class lever
the forearm during the arm curl exercise.
Work
force x distance
W = F x d
unit is joule
Power
Power = W/t
for example 1 shoulder press that last 1 second versus a shoulder press than last 3 seconds. The work is the same but the power is different
unit is watt = J/s
Powerlifting is a strength sport and not a power sport
Energy
the ability or capacity to perform mechanical work.
Constant- resistance machines
Pulleys, conuterbalance machines
Accommodating-resistance machines
isokinetic dynamometers, flywheels, pneumatic equipment
Spinal flexion
where the spine curves forward with the neck moving toward the chest
erector spinae
3 muscle pairs, the iliocostalis, longissimus, and the spinalis. spinal extension
Lowering the thigh
hip extension
Hamstrings
3 muscles the biceps femoris, semitendinosus, and semimembranosus,
Double progressive program
The number of times the activity is repeated is increased over time until the person can do 12 reps. Then the weight is increased and the process starts over.
Closed Kinetic Chain exercise
Activities that are similar to actions performed in the life of an average human. Usually done with the feet on the floor
Open Kinetic Chain exercises
Activies that segregate muscle groups that usually doesn’t resemble daily life. Usually for athletes.
Blitz system
similar to split training. each session focuses on one particular part of the body