Nike ReactX Infinity Run 4 - Trainers - Blue - UK 7.5

The ReactX foam provides enhanced cushioning and improved energy return, leading to a softer feel and a more responsive ride compared to traditional foams.

Yes, the shoe's cushioning and stability features make it a good option for marathon training, particularly for daily runs and longer endurance sessions.

You should have about a thumb's width of space between your longest toe and the end of the shoe. The heel should feel secure without slipping, and the midfoot should feel comfortably snug.

These trainers are primarily designed for road running. While they might handle light, well-maintained trails, they lack the aggressive tread and protection needed for more technical off-road terrain.

With regular use and proper care, the Nike ReactX Infinity Run 4 typically lasts between 300 to 500 miles, depending on running style, terrain, and individual wear patterns.

ReactX foam offers a softer feel and greater energy return while also being more sustainably produced than the original React foam.

Ensure you have selected the correct size. Try wearing thinner socks or loosening the laces. If the issue persists, consider a half-size up.

The ReactX foam is designed for durability. If cushioning feels significantly reduced, it may indicate the shoe has reached the end of its lifespan (typically 300-500 miles) and needs replacement.

The outsole provides good traction on dry surfaces. On wet surfaces, grip may be reduced. Exercise caution and ensure the outsole is free from debris.

The shoe offers a supportive structure. If you experience persistent arch discomfort, consider consulting with a running specialist or trying an insole with different arch support.