Helgerud et al. 2007, Aerobic high-intensity intervals improve VO2max
The 4x4 protocol (4 x 4 min at 90-95% HRmax) reliably raised VO2max in moderately trained people. Moderate.
| resource | https://pubmed.ncbi.nlm.nih.gov/17414804/ |
| tags |
The 4x4 protocol (4 x 4 min at 90-95% HRmax) reliably raised VO2max in moderately trained people. Moderate.