How can a heart rate per minute be determined during a workout? A: Count the pulse in the thumb for 15 seconds by pressing the index finger and thumb together, then multiply by 4.

B: Place the thumb over the heart, count the pulse for 6 seconds, then multiply by 10.

C: Place the index and middle finger on the base of your neck, count the pulse for 10 seconds, then multiply by 6.

D: Place your thumb on your palm of your opposite hand, count the pulse for 10 seconds, then multiply by 6.