Mae diffyg ymarfer corff yn gwanhau'r cyhyrau, gan gynnwys y galon a'r ysgyfaint.
↑Stampfer, M. J.; Hu, F. B.; Manson, J. E.; Rimm, E. B.; Willett, W. C. (2000). "Primary Prevention of Coronary Heart Disease in Women through Diet and Lifestyle". New England Journal of Medicine 343 (1): 16. doi:10.1056/NEJM200007063430103. PMID 10882764.
↑Hu., F., Manson, J., Stampfer, M., Graham, C., et al. (2001). Diet, lifestyle, and the risk of type 2 diabetes mellitus in women. The New England Journal of Medicine, 345(11), 790–797. Adalwyd ar 5 Hydref, 2006, o gronfa ddata ProQuest.