Brooks Glycerin GTS 23 Trainers - Black/Grey - UK 8

The GuideRails system acts like bumpers for your feet, keeping excess inward or outward movement in check. This helps guide your body's natural motion path, reducing stress on your knees and hips.

Yes, the Glycerin GTS 23 is an excellent choice for marathon running due to its superior cushioning and support, which help manage fatigue over long distances.

These trainers are primarily designed for road running and hard surfaces. While they can handle light, well-groomed trails, they lack the aggressive traction and protection needed for technical trail running.

If you experience overpronation (your foot rolls inward excessively) or feel knee/hip instability during runs, the GuideRails might be beneficial. Runners with a neutral gait may prefer Brooks' neutral models like the Glycerin (non-GTS).

Most running shoes, including the Glycerin GTS 23, typically need replacement every 300-500 miles (480-800 km) or after about a year of regular use, depending on your running habits and weight.

The engineered mesh is designed to be adaptive and offers some give. However, it does not stretch significantly. Proper sizing is crucial for comfort.

Loosen the laces and re-lace them, ensuring even pressure. If discomfort persists, consider trying a different size or width, or consult with a running shoe specialist.

This can be a sign of normal wear. For potential temporary improvement, ensure the shoes are clean and dry. The cushioning is designed to last for a significant number of miles, but will eventually degrade.

Regularly inspect the outsole for wear patterns. If significant wear is observed on specific areas, it might indicate a biomechanical issue. Consider consulting a gait analysis specialist.