Kinesiology 1080A/B Lecture Notes - Lecture 3: Null Result, Hazard Ratio

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18 Dec 2017

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1= null (no hazard or risk with mortality) Less than 4 to greater than 8 spent sitting in each range. Look at modifying effect of that relationship by modifying hours per week. 30 is less than an hour (45-60) per day. 2-5 mets 5 mins of moderate to vigorous every day. Hazard ratio goes up over 1 line, really good protection from mortality if your activity profile is very strong. If you reduce activity profile, irrespective your sitting profile there is an increased risk linear increase as more time is spent sitting. 20-25 mins a day (guidelines) the more you sit the more hazard risk goes up (no protective benefit) Only profile that only protects yourself from reducing/elimination hazard irrespective of how much you sit is if you can find 60+ a day who can push yourself really hard. 85% of people don"t meet guidelines even just meeting guidelines isn"t enough.

Related Questions

Grade inflation Gone Wild - sTUarTrojsTaCzer

A bout six years ago, I was sitting in the student union of a small liberal arts college when I saw a graph on the cover of the student newspaper that showed the history of grades given at that institution in the past 30 years.

Grades were up. Way up.

I am a scientist by training and I love numbers. So when I looked at that graph, I wondered, How many colleges and universities have
data like this that I can find? The answer is that a lot of schools have data like this hidden somewhere. Back then, I found more than 80 colleges and universities with data on grades, mostly by poking around the Web. Then I created a website (gradeinflation.com) so that others could find this data. I learned that grades started to shoot up nationwide in the 1960s, levelled off in the 1970s, and then started rising again in the 1980s. Private schools had much higher grades than public schools, but virtually everyone was experiencing grade inflation.

What about today?

Grades continue to go up regardless of the quality of education. At a time when many are raising questions about the quality of U.S. higher education, the average GPA at public schools is 3.0, with many flagship state schools having average GPAs higher than 3.2. At a private college, the average is now 3.3. At some schools, it tops 3.5 and even 3.6. A is average at those schools! At elite Brown University, two-thirds of all letter grades given are now A's.

These changes in grading have had a profound influence on college life and learning. When students walk into a classroom knowing that they can go through the motions and get a B+ or better, that's what they tend to do, give minimal effort. Our college classrooms are filled with students who do not prepare for class. Many studies less than 10 hours a week that's less than half the hours they spent studying 40 years ago. Paradoxically, students are spending more and more money on an education that seems to deliver less and less content.
With so few hours filled with learning, boredom sets in and students have to find something to pass the time. Instead of learning, they drink. A recent survey of more than 30,000 first-year students across the country showed that nearly half were spending more hours drinking than they were studying. If we continue along this path, well end up with a generation of poorly educated college graduates who have used their four years principally to develop an addiction to alcohol.

Many say that grade inflation is a complicated issue with no easy fix. But there are solutions. At about the same time that I started to collect data on rising grades, Princeton University began to do something about its grade-inflation problem. Its guidelines have the effect of now limiting A's on average to 35 per cent of students in a class. Those guidelines have worked. Grades are going back down at Princeton and academic rigour is making a comeback. A similar successful effort has taken place at Wellesley College in Massachusetts. And through a concerted effort on the part of faculty and leadership, grades at Reed College in Oregon have stayed essentially constant for 20 years.

Princeton, Wellesley, and Reed provide evidence that the effort to keep grade inflation in check is not impossible. This effort takes two major steps. First, school officials must admit that there is a problem. Then they must implement policies or guidelines that truly restore excellence.

I asked Dean Nancy Malkiel at Princeton why so few schools seem to be following Princeton's lead. Because its hard work, she answered. Because you have to persuade the faculty that its important to do the work.

Making a switch will take hard work, but the effort is worthwhile. The alternative is a student body that barely studies and drinks out of boredom. That's not acceptable. Colleges and universities must roll up their sleeves, bring down inflated grades, and encourage real learning. It's not an impossible task. There are successful examples that can be followed. I am looking forward to the day when we can return to being proud of the education that our nation's colleges and universities provide.

Analyze Stuart Rojstaczer's argument in Grade Inflation Gone Wild, addressing the following questions:
What evidence does Rojstaczer use to indicate that there is a problem?
How would you characterize this evidence (for example, scientific, anecdotal), and to what extent are you persuaded by the evidence he provides to suggest that grade inflation has a profound effect on life and learning?
To what extent does he persuade you that a change in policy is
necessary or that such a change would make a difference?

goldporcupine700

Question 2

The DSM-IV describes an "Eating Disorder Not OtherwiseSpecified" as:

self-starvation that leads to severe nutrient deficiencies

compulsive eating disorder

a variety of atypical eating behaviors used to maintain or lowerbody weight

recurrent episodes of extreme overeating followed byself-induced vomiting

Question 3

The nutrition paradox refers to:

coexistance of underweight and obesity in the same region

too mucn vitamin A in foods rich in vitamin C

poor countries that have excessive rates of obesity

obese children from nonobese parents

Question 4

Which of the following represents a nutrition transition?

decreased reliance on carbohydrates

increased consumption of sugar

increased availibility of maize over corn

lower-fat subsistence crops

Question 5

Which of the following is NOT part of the GOBI initiative?

breast-feeding

obesity control

immunization

growth monitoring

Question 6

Which of the following is a response to the drawbacks of theGreen Revolution?

WIC

high yield varities of grains

sustainable agriculture

biotechnology

Flag this Question

Question 70.5 pts

Worldwide, the major cause of undernutrition is:

unequal distribution of food

diseases (like AIDS)

poor farming practices

overpopulation

Question 8

Which agency monitors all confirmed causes of food-borneillness?

EPA

FDA

CDC

USDA

Question 9

In which of the following environments does Clostridiumbotulinum flourish?

acidic

alkaline

<40 degrees F

> 140 degrees F

Question 10

Which of the following is an example of food intoxication?

Norwalk virus

Salmonella

hepatitis A

Clostridium botulinum

Question 11

All of the following describe characteristics of the femaleathlete triad EXCEPT

menstrual dysfunction

disordered eating

hypertension

osteoporosis

Question 12

Impulsive, low self-esteem, seeks attention, extroverted, anderratic describe personality traits of:

bulemia nervosa

binge-eating disorder

obesity

anorexia nervosa

Question 13

Obsessive-compulsive, perfectionism, socially inhibited,compliant, and emotionally restrained describe personality traiatsof

binge-eating disorder

anorexia nervosa

bulimia nervosa

obesity

Question 14

The Institute of Medicine recommends a minimum of ________minutes of physical activity each day for adults.

Question 15

Regular exercise reduces the risk of type 2 diabetes by all butwhich of the following?

decreases the cellular uptake of blood glucose

delays the onset of complications of type 2 diabetes

increases control of blood glucose

enhances the action of insulin

Question 16

What is meant by the overload principle?

stretching a muscle group beyond the joint's healthy range ofmotion

improving fitness by placing extra physical demand on thebody

complete depletion of the body's glycogen

subjecting the body to inappropriately high stress

Question 17

The acronym FIT stands for:

fatigue, intensity, and training.

flexibility, increase, and training.

fitness, increase, and time.

frequency, intensity, and time.

Question 18

To achieve cardiorespiratory fitness it is recommended thattraining should occur ________.

3-5 days a week

daily

more than 5 days a week

2-3 days a week

Question 19

To achieve and maintain physical fitness, exercise intensityshould be ________ of the maximal heart rate.

35-50%

15-25%

25-30%

50-80%

Question 20

In which of the following types of exercise would CP (creatinephosphate) be an important source of energy?

biking up a mountain

sprinting in the 100-meter race

running a 10-kilometer road race

playing in a football game

Question 21

Which is NOT an advantage of aerobic metabolism over anaerobicmetabolism?

Much more energy is produced for every fuel molecule.

Aerobic metabolism acts more quickly.

Harmful metabolites do not accumulate as quickly.

A greater fuel supply is available.

Question 22

An unwanted effect of an overly vigorous warm-up is:

increased muscle temperature.

glycogen depletion.

increased body temperature.

reduced stress levels.

Question 23

Each day Bill power-walks for 45 minutes. Which fuel source(s)provide(s) energy during this activity?

amino acids

glucose

fatty acids

fatty acids and glucose

Question 24

The main disadvantage of using fat as a fuel is:

the body's limited storage capability.

its low energy density.

its slow metabolic breakdown.

the limitation of anaerobic metabolism.

Question 25

Joseph plays basketball for his high school team and he isconcerned that he is not consuming enough kilocalories to supporthis activity. Which of the following would be the best indicatorthat he is not consuming adequate kilocalories?

His hemoglobin is low.

His blood glucose levels are low.

His performance has been impaired.

He is losing weight.

Question 26

Rachel is a gymnast who trains 2 hours/day on average. Shesupports her daily activity by consuming 2,500 kilocalories perday. How many kilocalories should she be consuming fromcarbohydrate sources?

1,500-1,625 kilocalories

1,125-1,300 kilocalories

1,300-1,500 kilocalories

1,625-1,750 kilocalories

Question 27

The best time to replenish glycogen stores is:

the day after exercising.

a few hours before exercising.

the day before exercising.

right after exercising.

Question 28

In which of the following events would carbohydrate loading bethe most beneficial?

cross country skiing

baseball game

weight lifting

100-yard dash

Question 29

Osteoporosis, eating disorders, dehydration, and heat illnessare all possible consequences of:

the Zone diet.

carbohydrate loading.

inadequate dietary intake.

overtraining.

Question 30

Which of the following is the most potentially harmful?

heat syncope

heatstroke

heat cramps

heat exhaustion

Question 31

Which of the following athletes would be LEAST likely to developiron deficiency anemia?

a female marathon runner

a male basketball player who is a vegan

a female gymnast

a male distance swimmer

Question 32

Amenorrhea, sometimes seen in female athletes, is:

the onset of menstruation.

osteoporosis.

the loss of the menstrual cycle.

frequent diarrhea.

Question 33

Some athletes believe that caffeine can enhance athleticperformance because it has been shown to:

increase the transport of amino acids to exercising muscle.

increase muscle flexibility and strength.

increase the use of fatty acids as a fuel source.

regenerate ATP for energy.

Question 34

Which of the following ergogenic aids has been shown to enhanceshort-term exercise and resistance training?

chromium picolinate

creatine

carnatine

ephedrine

Question 35

Consuming processed foods as opposed to whole foods decreasesthe risk of contracting a food-borne illness.

True

False

Question 36

Regular physical activity can increase HDL-cholesterol.

True

False

Question 37

Nearly 1 in 6 American adults reports getting no physicalactivity at all.

True

False

Question 38

Lactic acid is a by-product of high-intensity exercise.

True

False

Question 39

Training can enhance the ability to store glycogen.

True

False

Question 40

The primary fuel source utilized in both anaerobic and aerobicexercise is protein (amino acids).

True

False

Question 41

Studies suggest that athletes need to consume more than 2grams/kg of protein each day to maintain muscle strength.

True

False

Question 420.5 pts

Refigerating or freezing foods will kill any bacteria present inthe food.

True

False

Question 43

Most athletes do not consume enough protein to support theiradded physical activity.

True

False

Question 44

Thirst is a very reliable indicator of dehydration.

True

False

Kinesiology 1080A/B Lecture Notes - Lecture 3: Null Result, Hazard Ratio

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