Boston's Winter Blues: Is SAD Ruining Your Marathon Training?

Photograph of Franklin Everett ShawBy Franklin Everett Shaw
March 17, 2026

The biting wind whips off the Charles River, and the sun sets before you’ve even finished your afternoon run. Boston in winter. It’s beautiful, yes, but for a Boston marathoner, it’s a potential training nightmare compounded by a very real threat: Seasonal Affective Disorder (SAD).

SAD isn’t just the “winter blues.” It’s a clinically recognized form of depression linked to the reduced sunlight exposure of fall and winter. For marathoners, already pushing their bodies to the limit, SAD can derail training, impact performance, and significantly affect mental well-being.

Ignoring SAD is not an option. You need a proactive, Boston-specific strategy.

First, recognize the enemy. SAD symptoms often mimic or exacerbate training fatigue. Are you just tired from the miles, or is there something more? Look for persistent low mood, loss of interest in activities you usually enjoy (including running!), changes in appetite (especially cravings for carbs), and difficulty concentrating. Don’t dismiss these as simply “part of the process.”

Light therapy is your first line of defense. Boston’s latitude means significantly reduced daylight hours. A light therapy box mimics natural sunlight and can help regulate your circadian rhythm. Look for a box that emits 10,000 lux and use it for 20-30 minutes each morning, ideally within the first hour of waking.

Where can you find these in Boston? Many pharmacies like CVS and Walgreens carry them, but for a wider selection and potentially better prices, check out online retailers like Amazon. Be sure to read reviews and choose a reputable brand.

Vitamin D supplementation is crucial. New England winters mean limited sun exposure, which translates to low vitamin D levels. Get your levels checked by your doctor. Most adults in this region benefit from a daily supplement of 2000-5000 IU of vitamin D3, but your individual needs may vary.

Don’t guess; test.

Indoor training is inevitable. Embrace it. Boston offers a wealth of options beyond just your treadmill at home. The Track at New Balance in Brighton provides an incredible indoor running space, though access may require membership or specific event registration. Consider joining a local running club that utilizes indoor facilities during the winter months.

The Boston Athletic Association (BAA) often hosts indoor training sessions. Check their website for schedules and availability.

Adapt your training plan. Don’t try to force outdoor workouts in dangerous conditions. Focus on strength training, cross-training (swimming at the YMCA, cycling at a spin studio), and shorter, more intense interval sessions indoors. This will help maintain your fitness without risking injury on icy sidewalks.

Consider the emotional impact of indoor training. It can be monotonous. Combat this by creating a motivating playlist, watching inspiring running documentaries, or joining a virtual running group.

Nutrition is key. SAD can trigger carbohydrate cravings. While it’s important to fuel your training, focus on complex carbohydrates, lean protein, and healthy fats. Load up on seasonal fruits and vegetables like squash, sweet potatoes, and kale.

Hydration is also crucial, even in colder weather. Don’t wait until you’re thirsty to drink.

Social connection is vital. SAD can lead to social isolation. Make a conscious effort to stay connected with friends and family. Join a running group, even if you’re only meeting for indoor workouts. Schedule regular coffee dates or phone calls.

Don’t underestimate the power of human interaction.

Mindfulness and meditation can help manage SAD symptoms. Even a few minutes of daily meditation can reduce stress and improve mood. There are many free apps and online resources available.

Consider guided meditations specifically designed for runners.

Seek professional help if needed. If your SAD symptoms are severe or interfering with your daily life, don’t hesitate to seek help from a mental health professional. Many therapists in the Boston area specialize in treating SAD.

Massachusetts General Hospital (MGH) and Beth Israel Deaconess Medical Center (BIDMC) have excellent psychiatry departments.

Common pitfalls to avoid: Ignoring early symptoms, relying solely on willpower, neglecting nutrition and hydration, isolating yourself, and being afraid to seek professional help.

Overcoming these challenges requires a proactive and personalized approach. Recognize the signs of SAD, implement light therapy and vitamin D supplementation, adapt your training plan, prioritize social connection, and seek professional help when needed.

Remember, training for the Boston Marathon is a marathon in itself, both physically and mentally. Taking care of your mental health is just as important as logging the miles. Don’t let SAD derail your dreams.

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