What is the best plan for creating safe exercise goals?

Which field of study contributes ideas and concepts to biomechanics?

Which statement best describes the role of the artificial heart? the artificial heart is a good replacement option for individuals who do not want a human heart. the artificial heart has been a great option because it can keep patients alive for a very long time. the artificial heart is not a good option because of the high possibility for rejection. the artificial heart has limited usefulness but can prolong life or be a tool to use while waiting for a transplant.

Qusetion? i have ran 10 miles in 1 hour today what other exercizes would i need to do to have a total of 270 minutes