So how do you use this knowledge? If you are a runner, experiment with replacing up to 50% of your off-season running with cycling. You should train at a similar intensity (e.g. heart rate), and calculate cycling distances at a ratio of about three to one compared with running.
As you approach the racing season, gradually reduce the cycling miles and add more running back in. The net result should be no reduction in your race times, but, hopefully, less injuries and more mental sharpness.
You never know, you might like the biking enough that you start to consider training for a triathlon!
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2. J Strength Cond Res 2003; 17(2):319-23