If you become ill or have to work late during the week and miss a workout, don't try to make up excessive mileage on the last day of the week because too great an increase can lead to injury.
Pumping Iron for the Long Haul Although it seems that resistance training would improve endurance performance, that's not always the case. Strength has to be converted into sport-specific movement and power. However, resistance training is important for reducing injuries and slowing the muscle mass losses associated with aging.
Intensity-Meter Most measures of intensity are either inaccurate or use expensive equipment like heart rate monitors or watt meters. However, ratings of perceived exertion are accurate and easy to use.