if muscles are not used on a regular basis they become weak and less flexible, the way to offset this effect is to exercise more often.
Answer: Do something that makes you happy, like play a video game, read a book, just mostly do what makes you happy so it can take off what is bothering you, we have all been there
Explanation:
Answer:
D. Carbon Dioxide
Explanation:
When you breathe in air, you take in the oxygen and release carbon dioxide.
Answer:
Your body needs MORE calories than when you were a child.
Explanation:
Calorie needs vary depending on age, sex, height and activity level. <em>Calorie needs are often higher during the teenage years than any other time of life.</em> During this period of rapid growth and development, boys require an average of 2,800 calories a day, while girls require an average of 2,200 calories a day.
