An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Smith LL, McCammon M, Smith S, Chamness M, Israel RG, O'Brien KF.Smith LL, et al.Eur J Appl Physiol Occup Physiol. 1989;58(8):833-7. doi: 10.1007/BF02332215.Eur J Appl Physiol Occup Physiol. 1989.PMID: 2767064
Israel RG, Sutton M, O'Brien KF.Israel RG, et al.J Am Coll Health. 1985 Jun;33(6):241-4. doi: 10.1080/07448481.1985.9935033.J Am Coll Health. 1985.PMID: 4045017No abstract available.