Saylor URL: http://www.saylor.org/books Saylor.org
[21] Kramer, A. F., Erickson, K. I., & Colcombe, S. J. (2006). Exercise, cognition, and the aging brain. Journal of
Applied Physiology, 101(4), 1237–1242.
[22] Schomer, H., & Drake, B. (2001). Physical activity and mental health. International SportMed Journal, 2(3), 1.
Retrieved from Academic Search Premier Database.
[23] Kirchhoff, A., Elliott, L., Schlichting, J., & Chin, M. (2008). Strategies for physical activity maintenance in African
American women. American Journal of Health Behavior, 32(5), 517–524. Retrieved from Academic Search Premier
Database.
[24] Centers for Disease Control and Prevention. (2007). Prevalence of regular physical activity among adults—
United States, 2001–2005. Morbidity and Mortality Weekly Report, 56(46), 1209–1212.
[25] American Heart Association. (1998). Statement on exercise, benefits and recommendations for physical
activity programs for all Americans. American Heart Association, 94, 857–862. Retrieved
fromhttp://circ.ahajournals.org/cgi/content/full/94/4/857?ijkey=6e9ad2e53ba5b25f9002a707e5e4b5b8ee015481&ke
ytype2=tf_ipsecsha
[26] Masters, W. H., & Johnson, V. E. (1966). Human sexual response. New York, NY: Bantam Books.
[27] Thornhill, R., & Gangestad, S. (1995). Human female orgasm and mate fluctuating asymmetry. Animal
Behaviour, 50(6), 1601. Retrieved from Academic Search Premier Database.
[28] Pillsworth, E., Haselton, M., & Buss, D. (2004). Ovulatory shifts in female sexual desire. Journal of Sex
Research, 41(1), 55–65. Retrieved from Academic Search Premier Database.
[29] Aversa, A., Isidori, A., De Martino, M., Caprio, M., Fabbrini, E., Rocchietti-March, M.,...Fabri, A. (2000).
Androgens and penile erection: evidence for a direct relationship between free testosterone and cavernous
vasodilation in men with erectile dysfunction.Clinical Endocrinology, 53(4), 517–522. doi:10.1046/j.1365-
2265.2000.01118.x; Jockenhövel, F., Minnemann, T., Schubert, M., Freude, S., Hübler, D., Schumann, C.,...Ernst, M.
(2009). Timetable of effects of testosterone administration to hypogonadal men on variables of sex and
mood. Aging Male, 12(4), 113–118. doi:10.3109/13685530903322858
[30] Meston, C. M., & Frohlich, P. F. (2000). The neurobiology of sexual function. Archives of General Psychiatry,
57 (11), 1012–1030.
[31] Baumeister, R. F. (2000). Gender differences in erotic plasticity: The female sex drive as socially flexible and
responsive. Psychological Bulletin, 126(3), 347–374.
[32] Leitenberg, H., & Henning, K. (1995). Sexual fantasy. Psychological Bulletin, 117(3), 469–496.