How useful would 70-80m sprints be vs. just 50-60m or flying sprints for developing Max.V?
And when generally training in a cycle, is it best to have speed days in a certain cycle of 3 weeks for example, be focused on mainly one type of speed work, such as 60m sprints, or is it best to have a large variety and have every workout different? So doing ins and outs one day, 70m sprints another day, accel. work next workout, etc etc