Myocardial function and aerobic fitness in adolescent females.
A recent report indicated that variations in myocardial functional (systolic and diastolic) responses to exercise do not contribute to inter-individual differences in aerobic fitness (peak VO(2)) among young males. This study was designed to investigate the same question among adolescent females. Thirteen highly fit adolescent football (soccer) players (peak VO(2) 43.5 ± 3.4 ml kg(-1) min(-1)) and nine untrained girls (peak VO(2) 36.0 ± 5.1 ml kg(-1) min(-1)) matched for age underwent a progressive cycle exercise test to exhaustion. Cardiac variables were measured by standard echocardiographic techniques. Maximal stroke index was greater in the high-fit group (50 ± 5 vs. 41 ± 4 ml m(-2)), but no significant group differences were observed in maximal heart rate or arterial venous oxygen difference. Increases in markers of both systolic (ejection rate, tissue Doppler S') and diastolic (tissue Doppler E', mitral E velocity) myocardial functions at rest and during the acute bout of exercise were similar in the two groups. This study suggests that among healthy adolescent females, like young males, myocardial systolic and diastolic functional capacities do not contribute to inter-individual variability in physiologic aerobic fitness.
Department of Pediatrics, Baystate Medical Center, Springfield, MA 01106, USA. thomas.rowland@bhs.org
Thomas
T
Rowland
Viswanath
V
Unnithan
Denise
D
Roche
Max
M
Garrard
Kathyryn
K
Holloway
Simon
S
Marwood
D000293:Adolescent; D015150:Echocardiography, Doppler; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006321:Heart / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D009206:Myocardium / Q000378:metabolism; D005082:Physical Exertion / Q000502:physiology; D010809:Physical Fitness / Q000502:physiology*; D012146:Rest / Q000502:physiology; D012916:Soccer / Q000502:physiology
Med Sci Sports Exerc. 1995 Oct;27(10):1362-70
8531606
Circ Res. 1984 Jan;54(1):38-49
6229365
J Am Coll Cardiol. 1997 Aug;30(2):474-80
9247521
Med Sci Sports Exerc. 1991 Dec;23(12):1338-48
1798375
Am J Physiol Heart Circ Physiol. 2002 Jan;282(1):H256-63
11748070
Am J Cardiol. 1976 Jan;37(1):7-11
1244736
Trends Endocrinol Metab. 2003 Mar;14(2):52-4
12591169
J Am Coll Cardiol. 1997 Nov 15;30(6):1527-33
9362412
Am Heart J. 1999 Jan;137(1):126-33
9878945
Am J Cardiol. 1990 Mar 1;65(9):662-8
2309636
Int J Sports Med. 2008 May;29(5):395-400
17879896
Cardiol Young. 2010 Dec;20(6):676-9
20727251
Med Sci Sports Exerc. 1994 Sep;26(9):1116-21
7808245
Chest. 2004 Dec;126(6):1910-8
15596692
Sports Med. 2002;32(15):973-86
12457418
Eur J Echocardiogr. 2008 Jul;9(4):542-6
18490313
Sports Med. 2008;38(7):541-51
18557657
Circulation. 1977 Apr;55(4):613-8
138494
Circulation. 2000 Oct 10;102(15):1788-94
11023933
Chest. 2005 Mar;127(3):1023-30
15764789
Circulation. 1984 Sep;70(3):357-66
6744540
J Am Soc Echocardiogr. 2004 Mar;17(3):212-21
14981417
Int J Sports Med. 2005 Mar;26(2):122-7
15726487
Int J Card Imaging. 1996 Sep;12(3):191-5
8915720
Am J Hum Biol. 2010 Sep-Oct;22(5):680-2
20737616
Chest. 2000 Mar;117(3):629-35
10712984
Eur J Appl Physiol. 2010 Apr;108(6):1201-8
20033203
Med Sci Sports Exerc. 2009 Sep;41(9):1721-8
19657299
Am J Cardiol. 1991 Jan 15;67(2):222-4
1987731
J Am Soc Echocardiogr. 2009 Apr;22(4):376-82
19269779