@misc{indiciae3646fdf6e3e3,
  title = {Frequency and duration of interval training programs and changes in aerobic power},
  author = {Fox, E. L. and Bartels, R. L. and Obrien, R. and Bason, R. and Mathews, D. K. and Billings, C. E.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750042446},
  note = {Source identifier: 19750042446}
}