are designed to build speed, endurance, and strength but they do more than improve your VO2 max and your lactate threshold. "The trick is maintaining good running action and form under the stress of increased fatigue," says George Gandy, director of athletics

progress, maintaining quality is crucial. Fatigue shouldn’t set in at any point to allow for full optimum development. If you start to tire and compromise the precision of your movement, then you need to take it back a stage.”Rests between sets should

. But these multitasking workouts also stress your body, so follow up with a day of easy running, cross-training or a rest day. Here's how to get it together.Run + StrengthBeat fatigue"Sandwiching a lower-body strength workout between two easy runs simulates race

, infections, fatigue and even injury - not to mention leaving you less than raring to go for your next session. Click through our slideshow to find out what works and why.

, infections, fatigue and even injury - not to mention leaving you less than raring to go for your next session. Click through our slideshow to find out what works and why.

the onset of fatigue. The electrolyte content of the gels has also been tweaked. Each now offers more than 80 minerals plus 100mg of sodium per 37g sachet, which work together to improve rehydration, reduce the risk of muscle cramp and boost carbohydrate

for the same length of time as did a placebo group. One thing this experiment did show is that something other than lactic acid buildup contributes to end-of-race fatigue.My recommendation: Sodium bicarbonate’s fatigue-busting powers come into play only

injury risk, and includes recovery time to avoid fatigue. Here's how to design your ideal running week.What to includeYour ideal week will feature a longer run to build endurance, a hilly run to improve your strength, and a scenic or social run

hill will keep your momentum from stalling once you reach the top. This will allow you to continue your surge down the other side of the hill, at which point you'll have gravity on your side – and a gap between you and your competition.When Fatigued

of progression runs is that they increase the volume of your fast-paced miles without the added fatigue of a full-length quality workout. If you end two of your usual easy runs with 10 minutes at half-marathon pace, you've added 20 minutes of tempo work to your