. Author manuscript; available in PMC: 2019 Sep 1.

Published in final edited form as: Med Sci Sports Exerc. 2018 Sep;50(9):1892–1898. doi: 10.1249/MSS.0000000000001631

Table 2.

Longitudinal comparison of high school versus collegiate linemen

	Longitudinal ASF Linemen
	High School N=23			Collegiate N=27
	Pre-Season	Post-Season	P-value^*	Pre-Season	Post-Season	P-value^*
Body Mass Index, Mean (SD), kg/m²	29.5 (4.5)	29.3 (4.5)^§	0.32	34.2 (3.1)	34.7 (2.9)^§	0.02
Systolic Blood Pressure, Mean (SD), mmHg	133.2 (11)	133.3 (16)	0.79	134.8 (8)	138.8 (11)	0.06
Diastolic Blood Pressure, Mean (SD), mmHg	72.0 (8.7)	75.6 (10)	0.16	78.2 (10)	78.2 (11)	0.80
Averaged LV Wall Thickness^†, Mean (SD), mm	8.8 (0.6)	9.4 (0.6)^§	<0.001	9.4 (0.9)	10.5 (1)^§	<0.001
LV Internal Diameter End-Diastole / Body Surface Area, Mean (SD), mm/m²	23.5 (2)	23.2 (2)^§	0.34	20.0 (4)	20.8 (2)^§	0.30
LV Mass / Body Surface Area, Mean (SD), gm/m²	88.7 (11)	99.5 (12)	<0.001	93 (13)	103 (14)	<0.001
Tissue-Doppler LV E′^‡, Mean (SD), cm/s	14.5 (1.8)	14.8 (2.5)^‖	0.47	15.8 (2.5)	13.2 (2.1)^‖	<0.001
Pulse Wave Velocity, Mean (SD), cm/s	4.8 (0.7)	4.7 (0.7)^‖	0.49	5.0 (0.6)	5.3 (0.7)^‖	0.003

ASF American-style football; LV left ventricle

Paired t-test (pre- to post-season measurement) derived p-value

^†

Averaged LV Wall Thickness = Interventricular Septum + Posterior Wall Thickness / 2

^‡

Averaged E′ (cm/s) = lateral E′ velocity + septal E′ velocity / 2

^§

2-sample t-test comparison of post-season high school vs. collegiate measurement, P<0.001

^‖

2-sample t-test comparison of post-season high school vs. collegiate measurement, P<0.05