B for 200W, A for lactate threshold, C for 250W lactate, B for lowest VO2max, A for energy increase 150W to 200W, C for highest VO2max.
Subject B expends the most kcal/min cycling at 200W, as their VO2 value (2600 ml/min) is the highest among the three subjects at this intensity. This indicates a higher energy expenditure. The VO2 values reflect the oxygen consumption during exercise and provide insights into energy utilization.
Subject A's higher blood lactate threshold is evident from their higher VO2 values at all exercise intensities. This suggests their ability to tolerate higher exercise intensities before lactate accumulation.
Subject C's highest blood lactate concentration at 250W signifies the onset of anaerobic metabolism, where lactate production surpasses its removal. This points to differences in aerobic capacity among the subjects.
Subject B's lowest VO2max (3800 ml/min) implies their comparatively lower maximal aerobic capacity. VO2max represents the maximum amount of oxygen an individual can use during intense exercise and is a key indicator of fitness.
Subject A's largest increase in energy expenditure from 150W to 200W indicates higher efficiency in utilizing energy sources during exercise progression.
Subject C's highest VO2max (3000 ml/min) showcases their superior aerobic fitness compared to the other subjects, emphasizing their maximal oxygen uptake capacity.
Learn more about Threshold
#SPJ11
ANSWERS:
1. Which subject expends the most kcal/min cycling at 200W?
- A: 2800
- B: 2600
- C: 2500
The answer is A
2. Which subject has the highest blood lactate threshold?
This would be the subject who can maintain a higher VO2 at higher wattages without a significant drop.
- A's VO2 drops by 200 from 250W to 300W.
- B's VO2 doesn't drop from 250W to 300W.
- C's VO2 drops by 500 from 250W to 300W.
The answer is B.
3. Which subject has the highest blood lactate concentration at 250W?
This would be inferred from a significant drop in VO2 at the next higher wattage (300W).
- C has the most significant drop, so the answer is C.
4. Which subject has the lowest VO2max?
- A's highest VO2: 3900
- B's highest VO2: 3800
- C's highest VO2: 3500
The answer is C.
5. Which subject has the largest increase in energy expenditure going from 150W to 200W?
- A: 600 increase
- B: 700 increase
- C: 500 increase
The answer is B.
6. Which subject has the highest VO2max?
As mentioned in the answer to question 4, the answer is A with a VO2max of 3900.
Education
B. Skin cancer
Vaccination
C. Salmonella poisoning
Food inspection
Answer:
A. Measles --> Vaccination
B. Skin cancer --> Education
C. Salmonella poisoning --> Food inspection
Explanation:
A. Measles
It is a very contagious and potentially serious viral disease, which spreads easily when the infected person removes respiratory secretions when speaking, coughing or sneezing. It can occur at all ages, with children being the most affected and being serious in young and immunocompromised children. It can cause serious respiratory complications such as pneumonia or diseases of the central nervous system.
Its symptoms: high fever, runny nose, conjunctivitis and cough, rash on the face and neck that spreads to the rest of the body.
There is currently a measles vaccine that is a combination vaccine that provides protection against three diseases: measles, mumps, and rubella (known as triple viral or MMR). The MMR vaccine is proven effective and very safe.
B.Skin cancer
It is known that the main cause of skin cancer is exposure to the sun, specifically to ultraviolet (UV) radiation. Much of the exposure of ultraviolet radiation throughout life is received in childhood, especially for recreational activities. Several studies have shown that sun exposure received throughout life, including that received in childhood, contributes to the development of skin cancer. This is why prevention must begin in childhood.
There are several ways to prevent skin cancer, such as performing activities under shade, not exposing yourself to the sun during peak hours, using creams with UV protection, going to the dermatologist on a recurring basis, but the main thing is to receive the necessary education to prevent this disease
C. Salmonella poisoning
Salmonellosis is a type of food poisoning caused by the salmonella bacteria (bacteria that usually live in the intestines of animals and humans and are expelled through feces). According to the World Health Organization (WHO), reptiles and birds are the main carriers.
The WHO notes that salmonellosis is: "one of the most common and widely spread foodborne diseases." He adds that: "Most cases of salmonellosis are mild, although sometimes the disease can cause death."
As a prevention, WHO advises control at all stages of the food chain, from agricultural production to food processing, manufacturing and preparation, both in commercial establishments and in homes.
In homes, prevention begins with good food storage and continues with aspects such as washing hands before cooking and wearing gloves when handling the feces of domestic animals.