Why are some runs harder than others?
Yahoo!,
Not every run is a good run. I know I’m not the only runner to have noticed this.
Dime qué número de pie tienes y te diré cómo atarte las zapatillas
Runner's World,
Muchas cosas afectan tu rendimiento al correr. Factores intrnsecos al corredor, como el peso corporal, el sexo y la edad.
Why You Can't Rely On Calorie Counts (And What To Do Instead)
Lifehacker,
Calorie/kJ counts are front-and-center on treadmill screens, food labels, and even restaurant menus.
Why You Can’t Rely on Calorie Counts (and What to Do Instead)
Lifehacker,
Calorie counts are front-and-center on treadmill screens, food labels, and even restaurant menus . But if you're trying to lose…