TABLE 2

Mean (SE) and Median Seconds Plank Held and Number of Modified Pull-Ups, by Gender and Age, United States, 2012

Plank (s)aModified Pull-Up (number)a
nMean (SE)MediannMean (SE)Median
Boys (age in y)
 66740.7 (3.5)39.0703.3 (0.4)1.3
 76355.7 (4.4)50.4625.8 (0.6)3.8
 85457.1 (5.4)58.0544.9 (0.7)3.9
 95466.4 (11.1)52.5525.3 (1.1)3.0b
 105969.2 (8.2)64.3595.2 (1.0)3.2
 115572.0 (6.2)67.4555.6 (0.6)4.0
 126472.7 (4.1)62.1647.7 (0.8)c5.1
 136284.7 (10.1)80.5618.6 (1.2)c8.1
 145793.0 (5.3)89.85711.1 (1.1)c9.5
 1561115.9 (12.5)97.96012.4 (1.1)c10.3
Girls (age in y)
 66148.3 (4.8)40.4613.4 (0.4)1.9
 76358.1 (5.4)54.6624.5 (0.6)2.8
 87063.0 (6.9)56.7705.3 (0.7)3.3
 95167.2 (5.2)63.7504.1 (0.4)3.2
 106455.4 (4.4)52.3643.8 (0.6)2.0
 116471.1 (5.1)66.4634.4 (0.7)3.4
 125873.3 (4.7)69.7584.7 (0.5)3.6
 136573.4 (5.8)64.9643.0 (0.3)1.0
 146978.6 (6.1)74.7683.8 (0.9)1.2b
 154286.8 (6.4)69.7413.5 (0.6)1.7
  • Source: CDC/NCHS, NHANES National Youth Fitness Survey.

  • a Significant linear trends by age (P ≤ .001) for both gender-specific measures except modified pull-up among girls (P = .27).

  • b Relative SE ≥30% but <40%.

  • c Significant difference compared with girls (P < .003).