Muscle chart

Question 1

Childhood muscle masss

Answer 1

• muscle mass accounts for 23- 25% of body weight.
• muscle growth predominately occurs through hypertrophy
• muscle cells grow in diameter and length due to lengthening sacromere

Question 2

Childhood muscle fiber type

Answer 2

at birth 15% of muscle fibers are undifferentiated

• by 1 all fiber types are differentiated similar to adults

Question 3

adolescent muscle mass

Answer 3

• gender difference becomes marked during and after adolescence

Question 4

Muscle mass in boys increase rapidly till what age

Answer 4

17 ( 54% of body weight)

Question 5

muscle mass in girls increase rapidly until what age ?

Answer 5

13 ( 34% of body weight)

Question 6

Middle age adult muscle mass

Answer 6

small change in muscle mass during adult hhood

- 10 % of muscle mass is loss between 20 and 50

Question 7

middle age adults muscle fibers

Answer 7

• number and diameter of fiber decrease

Question 8

Muscle mass in Older adults

Answer 8

• After age 50 muscle mass is lost at a fast rate

- additional 30% of muscle mass is lost at age 80( 40% of muscle mass gone)

Question 9

change in muscle fiber in older adult hood

Answer 9

muscle fibers will not decrease till age 70

Question 10

childhood changes in muscular strength

Answer 10

• Strength increases steadily as children get older
• boys will be stronger than girls of the same height

boys and girls have similar strength levels until the age 13

Question 11

child hood functional strength

Answer 11

functional strength increases faaster than muscle you would expect with muscle mass. due to neurological factors

Question 12

adolscent muscular strength

Answer 12

boys spurt of increased strength comes at age 13

• Girls have steady strength increase until the plateu