@misc{indiciaeb988dda1da04,
  title = {Methods of exercise testing. Step test, bicycle, treadmill, isometrics.},
  author = {R A Bruce},
  year = {1974},
  doi = {10.1016/0002-9149(74)90211-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4824847/},
  note = {Source identifier: 4824847}
}