What problems do you think athletes/people can run into when they are tracking their HR from a fitness standpoint?

There are many problems that an athlete face during training time. Weight loss, proper nutrition maintenance are the biggest problem with athletes.

Explanation:

The unsafe management of the weight can affect the performance of the athlete. It affects the athlete's health in a negative sense. Many times the client and athlete or trainer lose weight by not eat food.

They took limited nutrients in their diet. These type of people always live in the pressure of the activity in sports. Always take the training with safe weight and maintenance the weight in the exercise and sports.

The athlete trainer provides proper nutrition information that is very important for the sports person. The athlete trainer used a protocol to achieve their goals and target that is safe and according to the current evidence.

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made

which of what? i am confused