Breaking the Rules

THE RULE: Rehab aerobically
When injury strikes, most runners dutifully (if reluctantly) slog away on the elliptical or stationary bike or in the pool to salvage their fitness. When they're cleared to hit the road, they gleefully run for a few days, then BAM!—they're injured again. "All that cross-training built this huge Cadillac engine," Benson says, "but they've got a puny little Chevrolet transmission." The irony is cruel: The aerobic fitness these runners acquire in rehab allows them to start too fast and push too hard when they return to running, compromising the ligaments, tendons, and muscles not yet re-adapted to the stress of running.
HOW TO BREAK IT: The real solution, of course, is heeding a superslow return to running. That said, you can minimize the risk posed by an outsized cardiovascular system by spending no more than half of your rehab time on cardio. Spend the remainder on strength and flexibility training to correct muscle imbalances that may have contributed to your injury.
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