Week 1 Flashcards

1
Q

What are the 5 aspects of exercise physiology

A

Physiology, homeostasis/steady-state, acute exercise, chronic exercise, exercise testing

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2
Q

Carbs role in the body

A

Energy source during intense exercise
Protein sparer
Fuel for the CNS
Metabolic primer

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3
Q

CHO intake (carbs)

A

Sedentary 70kg person- 300g or 40-50% of total cals
Physical active- 400-600g or 60%
Athlete- 70% or 8-10kg of body mass

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4
Q

What results from a low CHO diet

A

Rapidly compromises glycogen reserves for vigorous physical activity and intense training

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5
Q

Where and what does glycogen store

A

Carbs in the muscle and liver

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6
Q

Carbs in kcals stored as carbs

A

2000 kcals

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7
Q

Muscle stores about ____ of glycogen

A

400g

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8
Q

Liver stores___ glycogen

A

100g

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9
Q

What’s the upper limit of glycogen storage

A

15 g/kg BW

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10
Q

What does glycogen stores do during exercise

A

Provide major carbs supply for active muscles

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11
Q

GI

A

Serves relative qualitative indicator to raise blood glucose levels

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12
Q

Lipid’s role

A

-Energy source and reserve
-Protect vital organs
-Thermal insulation
-Vitamin carrier and hunger suppressor

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13
Q

Lipid intake

A

20-35% of daily kcal
More or equal of total lipids should be unsaturated fatty acids

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14
Q

Recommended % of saturated and trans fats

A

Saturated- <7%
Trans- <1%

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15
Q

Factors influencing fat consumption

A

Personal taste
Money spent on food
Geographical influences
Availability of lipid-rich foods

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16
Q

Why does triacylglycerol synthesis increase after a meal

A

-food absorption increases blood levels of fatty acids and glucose
-relatively high levels of circulating insulin facilitate triacylglycerol synthesis

17
Q

Four conditions in which lipolysis occurs

A

-low-to-moderate-intensity physical activity
-prolonged exercise that depletes glycogen reserves
-low-calorie dieting or fasting
-cold stress

18
Q

Phospholipids

A

Neutral fat joined with phosphorus

19
Q

Glucolipids

A

Neutral fat joined with glucose

20
Q

Lipoproteins

A

Formed in liver from union of protein with triacylglycerols, phospholipids, or cholesterol; constitute main form for lipid transport in blood

21
Q

4 types of lipoproteins based on density

A

-chylomicrons
-high-density (HDL)
-low-density (LDL)
-very-low density (VLDL)

22
Q

3 major sources of body protein

A

-muscle
-blood plasma
-visceral (abdominal) tissue

23
Q

True or False: exercise decreases protein breakdown

A

False: most exercise intensities will moderately increase protein breakdown

24
Q

Roles of Vitamins

A

-control tissue synthesis
-protect integrity of the cells plasma membrane
-act as anti-oxidants

25
Q

What are the 2 mineral classifications

A

-seven major- >100mg/d
-fourteen trace- <100mg/d

26
Q

Roels of minerals

A

Serve as constituents of enzymes, hormones, and vitamins

27
Q

Calcium

A

Body’s most abundant mineral
Combines with phosphorus to form bones and teeth

28
Q

Functions of calcium

A

Muscle contraction
Blood clotting
Nerve impulse transmission
Activation of select enzymes
Synthesizes calcitriol
Transports fluids across cell membranes

29
Q

Osteoporosis

A

-Porous bones due to mineral deficiency
-result of prolonged negative calcium balance
-bones lose calcium content and density and become porous and brittle
-ages 19-50- 1000mg/d
-regular PA slows skeletal aging (weight bearing)

30
Q

Exercise benefits to bone health

A

-benefits on bone mass accretion are greatest during childhood and adolescence
-mechanical loading in reg. Exercise slows bone aging
-short, intense loading 3-5 times a week provide potent stimulus to maintain and increase bone mass
-high impact and strain induce greatest increases in bone mass

31
Q

6 principles to promote bone health

A

-Specificity
-overload
-initial values
-diminishing returns
-more is not necessarily better
-reversibility

32
Q

Female athlete Triad

A

-Amenorrhea
-disordered eating
-osteoporosis

33
Q

Functions of Iron

A

-increases bloods oxygen-carrying capacity by binding with hemoglobin
-serves as a structural component of myoglobin
-facilitates cellular energy transfer
-replenishes iron stores (bone marrow, duodenum, liver, spleen, skeletal muscle)
-transferin- transports iron from ingested food and damaged red blood cells to tissues in need

34
Q

Exercise-induced Anemia

A

-strenuous training may create added demand for iron that exceeds its intake, resulting in an “iron drain” and reduced physical performance,
-several days of training increase plasma volume by 20% while RBC volume remains unchanged and hemoglobin concentration decreases in the expanding plasma volume.
-despite increasing his hemoglobin dilution, exercise training improves aerobic capacity and exercise performance.