It’s the correct balancing of fast running and recovery that results in successful interval training.
This brainchild of French exercise scientist Veronique Billat may be the best workout you've never done.
This tough track session is a good workout to repeat 3-4 times over the course of a 12-week 5K/10K training cycle.
This tough track session has been a secret to many a fast 5K runner's success.
Lasse Viren loved this track workout. You should learn to like it too.
Give this workout a shot when transitioning back into track training.
Don't go faster than you should just because you're feeling good!
Get more bang for your buck by switching up the stimulus.
The exact rate your body absorbs and responds to a given workout is going to be influenced by a variety of factors.