Answer:
Timing
Explanation:
I am a Junior Olympian in Track and Field.
Answer:
More oxygen is also going to the muscles. This means the heart beats fewer times per minute than it would in a nonathlete. However, an athlete's heart rate may go up to 180 bpm to 200 bpm during exercise. Resting heart rates vary for everyone, including athletes.
Explanation:
It’s D because it’s literally common sense
Answer:
Mechanical barriers are devices that provide a physical barrier between the sperm and the egg. Examples of mechanical barriers include the male condom, female condom, diaphragm, cervical cap, and sponge. The condom is the only contraceptive method that helps prevent sexually transmitted infections (STIs).