According to the talk-test method of measuring exercise intensity, a person who is engaging in vigorous physical activity should be
a. able to talk during the activity.
b. able to sing during the activity.
c. unable to hear others talk during the activity.
d. unable to talk during the activity.

D. unable to talk during the activity.

Explanation:

The talk test is a subjective method that is used for the estimation of appropriate cardiorespiratory exercise intensity. This method is used for maintaining the intensity of exercise at which the conversation of the person can be found to be comfortable.

When an exerciser reaches up to the intensity at which he/she barely respond in conversation then the intensity is considered to be safe and appropriate for the improvement of the cardiorespiratory endurance.

According to the able explanation, D is the correct option. The person will be unable to talk due to an increase in the intensity of the exercise.

his week a heat wave will be hitting, and most of the country will be experiencing temperatures above average for july. due to humidity, the temperature outside can feel even warmer than it actually is. this adjusted temperature, often referred to as the “feels like” temperature is called the heat index. the chart shows the heat index, which is calculated based on temperature and relative humidity. use this chart to answer the following questions.