Fig. 1From: Association between 90o push-up and cardiorespiratory fitness: cross-sectional evidence of push-up as a tractable tool for physical fitness surveillance in youthMean (SD) musculoskeletal and cardiorespiratory fitness and BMI scores in 3rd grade, (e) 4th grade, and (f) 5th grade. Scores on trunk lift and the back saver sit and reach tests were measured in inches, push-up and curl-up are the number of repetitions completed, and raw BMI was calculated as kgm− 3Back to article page