Results
Threshold improvement was highest after 4×8 min intervals, 16.2%! 9.2% after 4×16 min intervals, 8.2% after 4×4 intervals, and even 7.7% after low-intensity training.
VO2 Max Power increased by 8.5% after 4×8 min intervals, 5.2% after 4×4 min intervals, 3.0% and 2.6% after 4×16 min intervals and low-intensity training