Abstract
Objectives
To investigate associations between physical activity and endogenous sex hormones after menopause with a special focus on confounding and effect modification by body mass index (BMI).
Methods
A cross-sectional study among 1,260 postmenopausal women was conducted. Generalized linear models were used to compare levels of total leisure-time physical activity, sports activities, bicycling, and walking with levels of sex hormones and sex-hormone-binding-globulin (SHBG).
Results
Higher sports activity levels were significantly associated with lower levels of estrone and total and free testosterone in multivariate adjusted models. After additional adjustment for BMI, associations with estrone and free testosterone were attenuated; the association with total testosterone remained unchanged. No physical activity variable was significantly related to total and free estradiol, androstenedione, or SHBG. We did not observe effect modification by BMI.
Conclusions
Sports activities may lead to lower levels of estrone and testosterone in postmenopausal women. While effects on estrone and free testosterone seem to be largely mediated by BMI, effects on total testosterone appear to be mainly independent of BMI. The BMI-independent effects on these hormones (especially on total testosterone) could at least partly explain why physical activity has been frequently reported to be preventive for postmenopausal breast cancer, even after accounting for BMI.
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References
Monninkhof EM, Elias SG, Vlems FA et al (2007) Physical activity and breast cancer: a systematic review. Epidemiology 18(1):137–157
Friedenreich CM, Neilson HK, Lynch BM (2010) State of the epidemiological evidence on physical activity and cancer prevention. Eur J Cancer 46(14):2593–2604
Hankinson SE, Eliassen AH (2007) Endogenous estrogen, testosterone and progesterone levels in relation to breast cancer risk. J Steroid Biochem Mol Biol 106(1–5):24–30
Fortunati N, Catalano MG, Boccuzzi G, Frairia R (2010) Sex Hormone-Binding Globulin (SHBG), estradiol and breast cancer. Mol Cell Endocrinol 316(1):86–92
Simpson ER, Merrill JC, Hollub AJ, Graham-Lorence S, Mendelson CR (1989) Regulation of estrogen biosynthesis by human adipose cells. Endocr Rev 10(2):136–148
Kendall A, Folkerd EJ, Dowsett M (2007) Influences on circulating oestrogens in postmenopausal women: relationship with breast cancer. J Steroid Biochem Mol Biol 103(2):99–109
Key TJ, Allen NE, Verkasalo PK, Banks E (2001) Energy balance and cancer: the role of sex hormones. Proc Nutr Soc 60(1):81–89
Key TJ, Appleby PN, Reeves GK et al (2003) Body mass index, serum sex hormones, and breast cancer risk in postmenopausal women. J Natl Cancer Inst 95(16):1218–1226
Lukanova A, Lundin E, Zeleniuch-Jacquotte A et al (2004) Body mass index, circulating levels of sex-steroid hormones, IGF-I and IGF-binding protein-3: a cross-sectional study in healthy women. Eur J Endocrinol 150(2):161–171
McTiernan A, Rajan KB, Tworoger SS et al (2003) Adiposity and sex hormones in postmenopausal breast cancer survivors. J Clin Oncol 21(10):1961–1966
Neilson HK, Friedenreich CM, Brockton NT, Millikan RC (2009) Physical activity and postmenopausal breast cancer: proposed biologic mechanisms and areas for future research. Cancer Epidemiol Biomarkers Prev 18(1):11–27
Kaye SA, Folsom AR, Soler JT, Prineas RJ, Potter JD (1991) Associations of body mass and fat distribution with sex hormone concentrations in postmenopausal women. Int J Epidemiol 20(1):151–156
Nagata C, Shimizu H, Takami R, Hayashi M, Takeda N, Yasuda K (2000) Relations of insulin resistance and serum concentrations of estradiol and sex hormone-binding globulin to potential breast cancer risk factors. Jpn J Cancer Res 91(9):948–953
Nagata C, Kabuto M, Takatsuka N, Shimizu H (1997) Associations of alcohol, height, and reproductive factors with serum hormone concentrations in postmenopausal Japanese women steroid hormones in Japanese postmenopausal women. Breast Cancer Res Treat 44(3):235–241
Nelson ME, Meredith CN, Dawson-Hughes B, Evans WJ (1988) Hormone and bone mineral status in endurance-trained and sedentary postmenopausal women. J Clin Endocrinol Metab 66(5):927–933
Stevenson ET, Davy KP, Seals DR (1995) Hemostatic, metabolic, and androgenic risk factors for coronary heart disease in physically active and less active postmenopausal women. Arterioscler Thromb Vasc Biol 15(5):669–677
Wu F, Ames R, Evans MC, France JT, Reid IR (2001) Determinants of sex hormone-binding globulin in normal postmenopausal women. Clin Endocrinol (Oxf) 54(1):81–87
Bertone-Johnson ER, Tworoger SS, Hankinson SE (2009) Recreational physical activity and steroid hormone levels in postmenopausal women. Am J Epidemiol 170(9):1095–1104
Cauley JA, Gutai JP, Kuller LH, LeDonne D, Powell JG (1989) The epidemiology of serum sex hormones in postmenopausal women. Am J Epidemiol 129(6):1120–1131
Chan MF, Dowsett M, Folkerd E et al (2007) Usual physical activity and endogenous sex hormones in postmenopausal women: the European prospective investigation into cancer-norfolk population study. Cancer Epidemiol Biomarkers Prev 16(5):900–905
van Gils CH, Peeters PH, Schoenmakers MC et al (2009) Physical activity and endogenous sex hormone levels in postmenopausal women: a cross-sectional study in the Prospect-EPIC Cohort. Cancer Epidemiol Biomarkers Prev 18(2):377–383
Madigan MP, Troisi R, Potischman N, Dorgan JF, Brinton LA, Hoover RN (1998) Serum hormone levels in relation to reproductive and lifestyle factors in postmenopausal women (United States). Cancer Causes Control 9(2):199–207
McTiernan A, Wu L, Chen C et al (2006) Relation of BMI and physical activity to sex hormones in postmenopausal women. Obesity (Silver Spring) 14(9):1662–1677
Flesch-Janys D, Slanger T, Mutschelknauss E et al (2008) Risk of different histological types of postmenopausal breast cancer by type and regimen of menopausal hormone therapy. Int J Cancer 123(4):933–941
Bohlscheid-Thomas S, Hoting I, Boeing H, Wahrendorf J (1997) Reproducibility and relative validity of energy and macronutrient intake of a food frequency questionnaire developed for the German part of the EPIC project European prospective investigation into cancer and nutrition. Int J Epidemiol 26(Suppl 1):S71–S81
Pols MA, Peeters PH, Ocke MC et al (1997) Relative validity and repeatability of a new questionnaire on physical activity. Prev Med 26(1):37–43
Schmidt ME, Slanger T, Chang-Claude J, Wahrendorf J, Steindorf K (2006) Evaluation of a short retrospective questionnaire for physical activity in women. Eur J Epidemiol 21(8):575–585
Ainsworth BE, Haskell WL, Whitt MC et al (2000) Compendium of physical activities: an update of activity codes and MET intensities. Med Sci Sports Exerc 32(9 Suppl):S498–S504
Ainsworth BE, Haskell WL, Leon AS et al (1993) Compendium of physical activities: classification of energy costs of human physical activities. Med Sci Sports Exerc 25(1):71–80
Rinaldi S, Geay A, Dechaud H et al (2002) Validity of free testosterone and free estradiol determinations in serum samples from postmenopausal women by theoretical calculations. Cancer Epidemiol Biomarkers Prev 11(10 Pt 1):1065–1071
Vermeulen A, Verdonck L, Kaufman JM (1999) A critical evaluation of simple methods for the estimation of free testosterone in serum. J Clin Endocrinol Metab 84(10):3666–3672
Prentice AM, Jebb SA (2001) Beyond body mass index. Obes Rev 2(3):141–147
Siiteri PK (1987) Adipose tissue as a source of hormones. Am J Clin Nutr 45(1 Suppl):277–282
Kaaks R (1996) Nutrition, hormones, and breast cancer: is insulin the missing link? Cancer Causes Control 7(6):605–625
Poretsky L, Cataldo NA, Rosenwaks Z, Giudice LC (1999) The insulin-related ovarian regulatory system in health and disease. Endocr Rev 20(4):535–582
Borghouts LB, Keizer HA (2000) Exercise and insulin sensitivity: a review. Int J Sports Med 21(1):1–12
Hawley JA, Lessard SJ (2008) Exercise training-induced improvements in insulin action. Acta Physiol (Oxf) 192(1):127–135
Patel SM, Iqbal N, Kaul S et al (2010) Effects of metformin and leuprolide acetate on insulin resistance and testosterone levels in nondiabetic postmenopausal women: a randomized, placebo-controlled trial. Fertil Steril 94(6):2161–2166
Newcomb PA, Klein R, Klein BE et al (1995) Association of dietary and life-style factors with sex hormones in postmenopausal women. Epidemiology 6(3):318–321
Bjornerem A, Straume B, Midtby M et al (2004) Endogenous sex hormones in relation to age, sex, lifestyle factors, and chronic diseases in a general population: the Tromso Study. J Clin Endocrinol Metab 89(12):6039–6047
Verkasalo PK, Thomas HV, Appleby PN, Davey GK, Key TJ (2001) Circulating levels of sex hormones and their relation to risk factors for breast cancer: a cross-sectional study in 1092 pre- and postmenopausal women (United Kingdom). Cancer Causes Control 12(1):47–59
Friedenreich CM, Woolcott CG, McTiernan A et al (2010) Alberta physical activity and breast cancer prevention trial: sex hormone changes in a year-long exercise intervention among postmenopausal women. J Clin Oncol 28(9):1458–1466
McTiernan A, Tworoger SS, Ulrich CM et al (2004) Effect of exercise on serum estrogens in postmenopausal women: a 12-month randomized clinical trial. Cancer Res 64(8):2923–2928
McTiernan A, Tworoger SS, Rajan KB et al (2004) Effect of exercise on serum androgens in postmenopausal women: a 12-month randomized clinical trial. Cancer Epidemiol Biomarkers Prev 13(7):1099–1105
Monninkhof EM, Velthuis MJ, Peeters PH, Twisk JW, Schuit AJ (2009) Effect of exercise on postmenopausal sex hormone levels and role of body fat: a randomized controlled trial. J Clin Oncol 27(27):4492–4499
Hankinson SE, Manson JE, Spiegelman D, Willett WC, Longcope C, Speizer FE (1995) Reproducibility of plasma hormone levels in postmenopausal women over a 2–3-year period. Cancer Epidemiol Biomarkers Prev 4(6):649–654
Micheli A, Muti P, Pisani P et al (1991) Repeated serum and urinary androgen measurements in premenopausal and postmenopausal women. J Clin Epidemiol 44(10):1055–1061
Muti P, Trevisan M, Micheli A et al (1996) Reliability of serum hormones in premenopausal and postmenopausal women over a one-year period. Cancer Epidemiol Biomarkers Prev 5(11):917–922
Toniolo P, Koenig KL, Pasternack BS et al (1994) Reliability of measurements of total, protein-bound, and unbound estradiol in serum. Cancer Epidemiol Biomarkers Prev 3(1):47–50
Acknowledgments
We thank A. Benner, S. Henke, B. Kaspereit, and B. Lederer for their valuable technical assistance and A. Lukanova for helpful comments on the manuscript. World Cancer Research Fund (grant number 2008/30) funded personnel (M. Schmidt. and B. Kaspereit) and laboratory material; Deutsche Krebshilfe e. V. (grant number 70-2892-BR I) funded the MARIE-study; German Research Foundation (DFG, GRK grant number 793) funded S. Liedtke.
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Liedtke, S., Schmidt, M.E., Becker, S. et al. Physical activity and endogenous sex hormones in postmenopausal women: to what extent are observed associations confounded or modified by BMI?. Cancer Causes Control 22, 81–89 (2011). https://doi.org/10.1007/s10552-010-9677-4
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DOI: https://doi.org/10.1007/s10552-010-9677-4