Exam 2 Flashcards
Atkins diet
Very low Carbohydrate (CHO) < 20g to 60g; no limits on protein and fat
Pritikin diet
Unprocessed, Low fat, small portions, low kcal
Weight Watchers
Point system well balance is preferred; support system
What fraction of the population is Obese?
2/3 or 67%
What happened to fat cells when you lose body fat?
With weight loss, cell size diminishes, but fat cell amounts do not decrease
What are the causes for obesity?
Genetics, Environment, Sedentary Lifestyle, Over consumption/creeping obesity
What is the best plan for weight loss?
Energy in < energy out (Eat less, Exercise more)
Android pattern (Apple)
fat around trunk/abdomen or upper body (central region) (high risk CVD)
Gynoid pattern (Pear)
fat around the hips, bum, thigh region (Low risk CVD)
High protein diet
Increase satiety and thermogenesis and maintenance FFM. Subjects’ loss more BF than those in typical low fat diets. Individuals report feeling fuller. Appears to help in keeping the weight off by increasing protein for individuals on maintenance.
Low Carb diet
Less than 20% of calories from Carbs or 20-60 grams/day (aka Atkins diet). Low Carb associated with deficiencies in vitamin A, B6, C and E; folate; calcium; magnesium; iron; potassium; and fiber. Headaches and constipation also a problem.
How do you calculate how much weight you will gain or lose by adding or increasing your daily caloric intake by a given amount?
To lose one pound of body fat one must expend 3500 more kcal than consumed (vice versa to gain)
Saturated fat
animal <10%
Palm, coconut, kernel, cocoa oils
Cholesterol-animal products
Diets high in saturated fat are also associated with heart disease and cancer.
Unsaturated fat
vegetable
Monounsaturated - olive, canola, safflower Polyunsaturated - Fish oils, canola, flaxseed
Complex carbohydrates
(Color your plate!) have more nutrition and fiber
Vegetables - 2.5 cups of veggies/day, 3 cups of dark green vegetables/week, 2 cups of orange veggies
Fruits (whole) 2 cups of fruit /day
Whole Grains – half of all grains should be whole
Simple (limit these!)
Fruit juice, Sugar & honey, Sweetened drinks
What were some of the major key topics covered in the Dietary Guidelines for Americans of 2010 (choose my plate)?
Increase fruits and vegetables!
Color your plate…dark green, red and orange
Whole grains (at least half)
Fat Free milk products
Lean sources of protein: Seafood, poultry, eggs, beans, nuts
Moderate amounts of healthy oils: Fish oils & nuts
Choose foods that provide more potassium, dietary fiber, calcium and vitamin D (veggies, fruits, whole grains, and milk and milk products)
How do you calculate numbers of kcals in a food item given grams of each nutrient?
Carbohydrates (CHO) - 4 kcal per gram
Protein – 4 kcal per gram
Fat – 9 kcal per gram
Multiply by these numbers
Food item with: 300 total kcal and 20 grams of fat:
Multiply the number of grams times the yields: 1g of fat = 9 kcal -> 20g x 9 kcal=180 kcal -> 180/300= 60% of kcal coming from fat
What are the recommendations for weight loss from NIH/NHLBI) for six months? What are the general recommendation for weight loss per week in pounds?
10% of initial body weight, achieved over a 6 month period (1-2lb/week)
Which test measure body composition (%fat to lean mass)?
Body composition assessment: Skinfold calipers, Bioelectrical impedance, Hydrostatic weighing, DEXA, Air displacement
Does BMI measure body comp?
No, Body mass index (BMI) evaluates an individual’s height and weight
If a client weighs 200 pounds and he is 30% fat, what is his lean weight and what is his lean weight?
Estimating total lean mass = total body mass- fat mass. 200 x 0.30 = 60…. 200 – 60 = 140
What is the formula for BMI?
BMI is calculated as body weight in kilograms divided by body height in meters squared
What do you have to do to gain/lose weight?
Gain: consume more calories than expended, positive energy balance
Lose: consume less calories than expended, negative energy balance
Which two minerals are women likely to be deficient in and why? What is their importance?
Women are susceptible to calcium deficiencies because: Energy intake is less than men. Less dairy products consumed
Women susceptible to deficiencies in iron because: energy intake is less than men. meat consumption tends to be less than men. losses through menstruation
What are considered unsafe approaches to weight loss?
Fad diets, Calories per day too low, Fasting, Diet pills (over the counter), Very-low calorie diets (<1200 kcal) without medical supervision, spot reduction, saunas, sweat suits and body wraps, vibrating belts, electrical stimulators
Mediterranean diet:
Whole grains, potatoes and pasta, High in complex carbs and fiber, Little meat and egg consumption, Some seafood and poultry consumption, Sources of fat are olives, olive oil, nuts and fish, High in monounsaturated and polyunsaturated fat intake, Low saturated fat intake
Vegetarian diet:
No meat, fish, poultry, dairy or eggs. Low in saturated fat & cholesterol. High in fiber, folate and vitamin C & E, carotenoids
Lacto-ovo-vegetarian:
does eat dairy and eggs
Vegan:
no animal products or derivatives
What about pharmacological treatments for weight loss?
Lipase Inhibition: Fat Malabsorption Agents. Example: Orlistat (Xenical)
Appetite Suppressants and Energy Expenditure-Increasing Agents. Example: Phentermine & Fenfluramine (Fen-Phen) and Sibutramine
know all the training principles.
Specificity of Training - Adaptations or changes which the body makes in response to training will be specific to the nature of the training stimulus
Individuality, diminishing returns, reversibility
Overload Principle: Progression, Using FITT
Recommendations for cardio
OVERALL >150 min. / wk of mod. exercise. Through either: 30-60 min. of mod. exercise (5d/wk) or 20-60 min. of vig. exercise (3 d/wk). With either: 1 continuous session or accumulation of multiple shorter sessions > 10 min. each. Gradually progress: Frequency, intensity, time, type
Resistance training frequency
Train each major muscle group 2-3 days/wk
Resistance training intensity
For each exercise: 8-12 repetitions improve strength and power, 10-15 repetitions improve strength in middle-age and older persons starting exercise, 15-20 repetitions improve muscular endurance.
Resistance training time
no time assigned. Dependent on the number of sets, reps and exercises
Resistance training type
Use a variety of exercises and equipment. 2 to 4 sets of each exercise will help adults improve strength and power.
resistance training recommendations
Very light or light intensity is best for older persons or previously sedentary adults starting exercise (>15 reps) and one set.
Adults should wait at least 48 hours between resistance training sessions.
Heart Rate Reserve Method (Karvonen)
(50-85% of VO2 max)
Maximum HR = 220- AGE
Target HR = [(Max HR- Resting HR) x % intensity] + Resting HR
Peak HR Method (Age predicted max HR)
Target HR = Max HR x % intensity
Talk Test Method!
Uses respiration rate to determine intensity
exercise intensity and the fat burning zone
Low intensity aerobic activity does not necessarily lead to greater expenditure of calories from fat.
More importantly, the total caloric expenditure for a given period of time is much less than with high-intensity aerobic activity.
CVD and exercise
1 killer of Americans. Physical inactivity is a major underlying risk factor for CVD
o Lowers risk by raising HDLs and improving cardiovascular function
o Positive effect on other concomitant risk factors for CVD such as diabetes mellitus and obesity
o Exercise lowers risk by reducing: Cholesterol (LDL & VLDL), High blood pressure, Insulin resistance
Hypertension exercise
Systolic blood pressure should rise, if it drops during exercise, stop immediately refer client to doctor. Systolic BP may be higher to start and thus absolute level will also be higher. If on medication, then BP will be the same as normotensives. Chronic aerobic exercise and moderate intensity weight training (without breath holding) will help lower BP
hypertension
Known as the “Silent killer”, BP ≥ 140/90, 1/4 of Americans affected (50 million), DASH diet & low sodium restriction recommended, losing weight and increasing physical activity priority
diabetes
Type 1 & Type 2. Excessive abdominal fat is the leading cause of Type 2 diabetes. Risk of CVD higher -> diabetes is positive risk factor for CVD