Friday 030516

By selecting the duration of both the work and rest intervals, interval training can be used to focus on each of each of the three metabolic pathways.

There are, however, hybrid intervals like the Tabata protocol (20 seconds of work followed by 10 seconds of rest repeated eight times) that have strong anaerobic and aerobic characteristics.

Ultimately, you need to experiment with varying intervals of work and rest in pursuit of particularly challenging combinations. Variances in interval work are important to broad adaptation or great fitness.

Dr. Stephen Seiler is a good source on the subject of interval training.