On a snowy morning in Cambridge, a jogger in a balaclava moves steadily along the Charles River—a rare sight in winter, when most runners retreat indoors. But as spring arrives and the weather warms, thousands of people lace up their shoes and return to the roads, often with more enthusiasm than caution. That eagerness can come at a cost: research shows that roughly half of all runners experience an injury serious enough to sideline them each year, a sobering statistic that underscores the importance of preparation.
For those starting fresh or dusting off their running practice, Adam Tenforde, an associate professor of physical medicine and rehabilitation at Harvard Medical School and sports medicine specialist at Spaulding Rehabilitation Hospital, offers evidence-based guidance rooted in how the body actually adapts to training. The key, he emphasizes, is patience—allowing the musculoskeletal system time to adjust rather than jumping into ambitious mileage right away.
Tenforde recommends thinking about training increases in manageable increments, gradually raising effort each week and then deliberately dropping training volume by one-third every third week to prevent overuse injuries. When it comes to shoes, the advice is practical: alternate between two pairs of training shoes to allow them to recover from moisture and humidity, and replace them every 300 to 500 miles or when they show visible wear. Sleep matters too—at least seven hours nightly can meaningfully reduce injury risk and enhance recovery between sessions.
Strength training forms the foundation of injury prevention. Tenforde advocates for two to three sessions per week focusing on lower-body exercises: calf raises, leg lifts, balance work, abdominal and foot core strengthening, and standing exercises like single-leg squats that mimic running form and build the stability runners need. These workouts address the weak links that often lead to injury.
Nutrition is equally critical and often overlooked. Tenforde cautions against fasting before runs, emphasizing that runners need sufficient fuel—particularly carbohydrates—to perform well and recover properly. Within 15 to 30 minutes after a run, a post-exercise snack combining carbohydrates and protein is essential for replenishing muscle glycogen. Chocolate milk, perhaps surprisingly, has been scientifically shown to be an ideal recovery drink. For female runners, menstrual cycle patterns can signal whether fueling is adequate; widening gaps between periods or cessation of periods may indicate underfueling. Male runners should similarly watch for persistent fatigue or markers of low testosterone, both tied to insufficient energy intake.
The gear conversation, Tenforde notes, doesn't require complexity. A pair of comfortable running shoes and weather-appropriate clothing—don't forget sunscreen—are the essentials. A watch that tracks distance and resting heart rate can help runners monitor recovery, offering a simple window into how the body is adapting to increased training.
Those starting out might consider structured programs like couch-to-5K plans, which build gradually over weeks, or working with a running coach. Having a specific race on the calendar can be powerful motivation. And importantly, anyone with underlying health concerns should check with a medical provider before substantially increasing physical activity.
The common thread throughout Tenforde's advice: small, consistent changes allow the body to adapt without breaking down. Running, after all, is a gift of simplicity—but that simplicity works best when respect for the body's need for gradual progression guides the way.