@misc{indiciaeea128e4a0903,
  title = {Beta-adrenergic-mediated improvement in left ventricular function by exercise training in older men.},
  author = {R J Spina and M J Turner and A A Ehsani},
  year = {1998},
  doi = {10.1152/ajpheart.1998.274.2.h397},
  url = {https://pubmed.ncbi.nlm.nih.gov/9486240/},
  note = {Source identifier: 9486240}
}