1. Physical activity is not related to semen quality in young healthy men
Lidia Mínguez-Alarcón, Ph.D., Jorge E. Chavarro, M.D., Sc.D., Jaime Mendiola, Ph.D., Audrey J. Gaskins, Sc.D., Alberto M. Torres- Cantero, M.D., Ph.D. 
Fertility and Sterility 
Volume 102, Issue 4, Pages (October 2014)
DOI: /j.fertnstert
Copyright © 2014 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Associations between quartiles of total activity and semen quality parameters. Means and 95% CIs are adjusted for BMI (kg/m2), smoking (current smoker vs. not current smoker), ejaculation abstinence time (hours), presence of varicocele (yes vs. no), TV watching (h/wk), caffeine intake (mg/d), and other micronutrients resources (trans fatty acids, vitamin C, β-cryptoxanthin, lycopene, and β-carotene) (g/d). Models for sperm motility are additionally adjusted for time to start semen analysis (minutes). Tests for trend were conducted across quartiles using a variable with the median activity level in each quartile as a continuous variable in the linear regression models.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2014 American Society for Reproductive Medicine Terms and Conditions