Why is it best to have a resting heart rate below 70 beats per minute?

While the average adult's resting heart rate should range between 60 and 100 bpm, anything over 90 bpm is considered high. Generally speaking, lower heart rates are considered better as it means that the heart muscle doesn't have to work as hard to keep a strong, steady rhythm.

amber has allowed scientists to study dna that has been preserved over millions of years.

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics