Psychologists use a systematic method in research in order to eliminate subjectivity and allow for consistency across studies. This is to ensure that data is tested and recorded in the most objective way possible as well as ensure that psychologists are defining and measuring psychological concepts and behaviors in the same way.
Cardiovascular or cardio-respiratory endurance or aerobic fitness, is the ability of the heart and lungs to deliver oxygen to the body's tissues during sustained physical activity. Muscular endurance is the ability of a muscle, or group of muscles, to perform continuously without fatigue. Weight training can be performed with free weights, such as barbells and dumbbells, or by using weight machines to increase the muscular strength.
Answer:
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Adults should do about 2-3 days of strength training exercises each week
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