Interval training is a great way to torch calories and improve your fitness level, but you don't need to be beholden to your stopwatch when doing speed work. You can add a dash of play to your sprints with a fartlek workout. Fartlek is the Swedish term for speed play, which just means changing your speed for varying distances while out on a run. How could a word that sounds so silly not be fun to put into practice?
This variation of interval training is perfect for urban areas since you can use different landmarks — like bus stops, benches, or the length of a city block — to set the distance of your sprints. Pick a spot ahead of you and increase your speed as you run toward it. Simple no? Keep reading for a sample workout after the break.