Aspects of Health Lecture 3

What is aerobic physical activity?

Answer: Rhythmic large-muscle movement sustained over time. | | Why: Examples include brisk walking, swimming, running, and cycling. | Source: Guidelines slide 7

What is muscle-strengthening activity?

Answer: Movement that improves muscle strength, power, or endurance. | | Why: Weights, resistance bands, and bodyweight exercises are examples. | Source: Guidelines slide 8

What is bone-strengthening activity?

Answer: Activity that places impact or tension on bones. | | Why: Jumping rope, running, and lifting weights can help strengthen bones. | Source: Guidelines slide 9

What three components describe aerobic activity?

Answer: Intensity, frequency, and duration. | | Why: They tell how hard, how often, and how long someone is active. | Source: Guidelines slide 7

What MET range represents moderate intensity?

Answer: 3.0–5.9 METs. | | Why: The lecture gives this absolute intensity range. | Source: Guidelines slide 10

What MET range represents vigorous intensity?

Answer: 6.0 or more METs. | | Why: The lecture classifies exercise at 6 METs or above as vigorous. | Source: Guidelines slide 10

What is sedentary behavior?

Answer: Time spent sitting or otherwise being inactive while awake. | | Why: The study measured typical daily sitting time. | Source: Du et al., pp. 1–3

What counts as meeting the adult aerobic guideline?

Answer: At least 150 moderate or 75 vigorous minutes weekly. | | Why: An equivalent mix also qualifies under the study's definition. | Source: Du et al., p. 1; Guidelines slide 25

A person brisk-walks for 30 minutes. What type of exercise?

Answer: Aerobic | | Why: Walking uses large muscles rhythmically for a period of time. | Source: Guidelines slide 7

Someone performs push-ups and resistance-band rows. What type?

Answer: Muscle-strengthening | | Why: These movements use resistance to challenge muscles. | Source: Guidelines slide 8

Children jump rope at recess. What benefit is emphasized?

Answer: Bone strengthening | | Why: Repeated impact places force on bones. | Source: Guidelines slide 9

A person can talk but not sing while walking. What intensity?

Answer: Moderate | | Why: The lecture's talk test describes this breathing level as moderate. | Source: Guidelines slide 10

A runner can say only a few words before breathing. What intensity?

Answer: Vigorous | | Why: Hard breathing limits conversation during vigorous activity. | Source: Guidelines slide 10

An adult walks briskly for 30 minutes on 5 days. Meets aerobic minimum?

Answer: Yes: 150 moderate minutes | | Why: Five 30-minute sessions add up to the 150-minute minimum. | Source: Guidelines slide 25

An adult runs vigorously for 25 minutes on 3 days. Meets aerobic minimum?

Answer: Yes: 75 vigorous minutes | | Why: Three sessions of 25 minutes equal 75 minutes. | Source: Guidelines slide 25

Someone does 150 minutes aerobic work but no strength exercise. What's missing?

Answer: Muscle-strengthening on 2 or more days | | Why: The guidelines include strengthening all major muscle groups. | Source: Guidelines slide 25

An adult does 10 minutes walking. Does it count toward weekly activity?

Answer: Yes | | Why: The 2018 guidelines removed the prior 10-minute bout requirement. | Source: Guidelines slides 12, 15

A previously inactive person wants to begin exercise. Best first approach?

Answer: Start low and increase gradually | | Why: The lecture says to build duration and effort slowly for safety. | Source: Guidelines slide 30

A 10-year-old exercises 60 minutes daily. Meets total daily target?

Answer: Yes, if activity is moderate-to-vigorous | | Why: For ages 6–17 the recommendation is at least 60 minutes daily. | Source: Guidelines slide 24

A teen only runs but never strengthens muscles. What should be added?

Answer: Muscle-strengthening at least 3 days per week | | Why: It should be part of the recommended daily activity. | Source: Guidelines slide 24

A teen skips activities that load the bones. What should be added?

Answer: Bone-strengthening 3 days each week | | Why: The youth guidelines recommend bone-loading activities regularly. | Source: Guidelines slide 24

A caregiver plans one sitting-based lesson after another for a 4-year-old. Better plan?

Answer: Include varied active play throughout the day | | Why: The preschool guideline emphasizes all-day active play. | Source: Guidelines slide 23

An older adult wants to prevent falls. What should their program include?

Answer: Balance, aerobic, and strengthening activities | | Why: The guidelines recommend multicomponent activity for older adults. | Source: Guidelines slide 26

An adult with a disability cannot meet 150 minutes. What does the guideline advise?

Answer: Be active within their abilities and avoid inactivity | | Why: The lecture encourages adapted levels of regular movement. | Source: Guidelines slide 28

A pregnant adult asks about a general weekly aerobic target. What does this lecture state?

Answer: 150 minutes of moderate activity | | Why: The guidance also recommends clinical oversight and individual adjustment. | Source: Guidelines slide 29

After a walk, an adult feels less anxious. What type of benefit?

Answer: Short-term mental health benefit | | Why: The guideline slides list reduced anxiety among immediate benefits. | Source: Guidelines slides 18, 20

A person improves sleep after becoming regularly active. What benefit is this?

Answer: Improved sleep outcomes | | Why: Better sleep is among the physical activity benefits presented. | Source: Guidelines slides 16, 20

An older adult becomes steadier after exercise. What outcome fits?

Answer: Better function and lower fall risk | | Why: The lecture lists improvements in function and fall-related outcomes. | Source: Guidelines slide 16

A researcher measures sitting hours per day. What behavior is measured?

Answer: Sedentary behavior | | Why: The Du study used self-reported typical daily sitting. | Source: Du et al., pp. 1, 3

A participant walks to work. Which activity domain is counted?

Answer: Transportation-related activity | | Why: The study included transportation, work, and leisure activity. | Source: Du et al., p. 3

A study finds 63.2% met aerobic guidance in 2007–08 and 65.2% in 2015–16. What happened?

Answer: No statistically significant improvement | | Why: The study reported a P value of .15 for the trend. | Source: Du et al., p. 1

Daily sitting rises from 5.7 to 6.4 hours. What does this show?

Answer: Sedentary time increased | | Why: The increase between the study's first and last cycles was statistically significant. | Source: Du et al., p. 1

Why can 75 vigorous minutes count like 150 moderate minutes?

Answer: Vigorous minutes receive double weight. | | Why: The research used moderate minutes plus twice vigorous minutes. | Source: Du et al., p. 3

Why does the advice say both move more and sit less?

Answer: High sitting time and low activity are separate concerns. | | Why: The study observed increased sedentary time even without a major change in guideline adherence. | Source: Du et al., pp. 1–2

Why is the finding 65.2% vs. 63.2% not proof of real improvement?

Answer: The change was not statistically significant. | | Why: The reported trend test gave P=.15. | Source: Du et al., p. 1

Why can't this survey establish that sitting caused an illness?

Answer: It is observational and based on reported behavior. | | Why: Association does not by itself establish cause and effect. | Source: Du et al., pp. 2–3

Why include exercise done at work or while traveling?

Answer: Activity happens outside leisure time too. | | Why: Measuring only gym or recreational activity could miss substantial movement. | Source: Du et al., pp. 2–3

Why did removing the 10-minute minimum matter?

Answer: Short activity sessions can still count. | | Why: The updated guideline recognizes benefits without a minimum bout length. | Source: Guidelines slides 12, 15

Why might a school promote activities children enjoy?

Answer: Enjoyment can support participation. | | Why: The youth recommendations encourage enjoyable and varied choices. | Source: Guidelines slide 24

Why should a person with a chronic condition personalize activity?

Answer: Abilities, symptoms, and safety needs may differ. | | Why: The lecture advises appropriate activities and consultation when needed. | Source: Guidelines slides 27–30