Getting in shape for endurance events - whether running, biking, swimming or triathlon - requires long hours actually doing the sport at which you'll compete. However, there are benefits from adding some variety to your workouts.
Strength training, particularly for the core and lower limbs, has been demonstrated to improve performance in runners, while cross training is a good way to get the benefits of recovery workouts without the stresses of additional miles.
The other big win for endurance athletes comes from doing interval work - time spent training at a higher tempo will ultimately improve your race speed.
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