Question

understanding key concepts
after reading the question or statement, select the
correct answer.

1. which of the following is a good test of your

cardiorespiratory fitness?
a. the time it takes to run or walk a mile
b. how many curl - ups you can do
c. how heavy a weight you can lift
d. whether you can bend over and touch your
toes

1. a healthy 30 - year - old would have a target

heart range between
a. 60 and 120 beats per minute.
b. 82 and 133 beats per minute.
c. 94 and 159 beats per minute.
d. 101 and 190 beats per minute.

1. exercises to improve your flexibility are

a. aerobic exercises.
b. isometric exercises.
c. isokinetic exercises.
d. stretching exercises.

Explanation:

• Question 12: Cardiorespiratory fitness is related to the heart, lungs, and blood vessels' ability to supply oxygen - rich blood to working muscles during physical activity. Running or walking a mile tests the endurance of the cardiorespiratory system. Curl - ups (b) test abdominal strength, lifting weight (c) tests muscular strength, and touching toes (d) tests flexibility.
• Question 13: The formula for calculating the target heart rate range is \( \text{Target Heart Rate}=(220 - \text{age})\times(0.5 - 0.85)\). For a 30 - year - old, \(220-30 = 190\). Then \(190\times0.5=95\) and \(190\times0.85 = 161.5\). The closest range to this calculation (considering rounding) is \(94 - 159\) beats per minute.
• Question 14: Stretching exercises (d) are specifically designed to improve flexibility by elongating muscles and increasing the range of motion around joints. Aerobic exercises (a) improve cardiorespiratory fitness, isometric exercises (b) involve static muscle contractions without joint movement, and isokinetic exercises (c) involve muscle contractions at a constant speed.

Answer:

1. A. The time it takes to run or walk a mile
2. C. 94 and 159 beats per minute
3. D. stretching exercises