Charles Boyer and other HALOites (Dr. Mark Tremblay, Travis Saunders, Allison McFarlane, Michael Borghese, Meghann Lloyd and Dr. Pat Longmuir) co-wrote a paper titled, “Feasibility, Validity, and Reliability of the Plank Isometric Hold as a Field-Based Assessment of Torso Muscular Endurance for Children 8â€“12 Years of Age,” that was recently published in Pediatric Exercise Science. Citations details are below along with a summary of the paper.
Boyer C, Tremblay M, Saunders TJ, McFarlane A, Borghese M, Lloyd M, Longmuir P. Feasibility, validity and reliability of the plank isometric hold as a field-based assessment of torso muscular endurance for children 8-12 years of age. Pediatr Exerc Sci. 2013 Aug;25(3):407-22.
ABSTRACT:Â This project examined theÂ feasibility,Â validity, andÂ reliabilityÂ of theÂ plankÂ isometricÂ holdÂ forÂ childrenÂ 8-12Â yearsÂ ofÂ age. 1502Â childrenÂ (52.5% female) performed partial curl-up and/orÂ plankÂ protocols to assessÂ plankÂ feasibilityÂ (n = 823, 52.1% girls),Â validityÂ (n = 641, 54.1% girls) andÂ reliabilityÂ (n = 111, 47.8% girls). 12% (n = 52/431) ofÂ childrenÂ could not perform a partial curl-up, but virtually allÂ childrenÂ (n = 1066/1084) could attain a nonzero score for theÂ plank.Â PlankÂ performance without time limit was influenced by small effects withÂ ageÂ (Î˛ = 6.86; p < .001, Î·2 = 0.03), flexibility (Î˛ = 0.79; p < .001, Î·2 = 0.03), and medium effects with cardiovascularÂ enduranceÂ (Î˛ = 1.07; p < .001, Î·2 = 0.08), and waist circumference (Î˛ = -0.92; p < .001, Î·2 = 0.06). Interrater (ICC = 0.62; CI = 0.50, 0.75), intra-rater (ICC = 0.83; CI = 0.73, 0.90) and test-retest (ICC = 0.63; CI = 0.46, 0.75)Â reliabilityÂ were acceptable for theÂ plankÂ without time limit. These data suggest theÂ plankÂ without time limit is a feasible, valid and reliableÂ assessmentÂ ofÂ torsomuscularÂ enduranceÂ forÂ childrenÂ 8-12Â yearsÂ ofÂ age.