The increasingly extensive cushioning systems and softer soles on trainers are increasing the rate of muscle breakdown in the foot and causing the tendons to weaken.
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The 8 Best Podiatrist-Recommended Shoes if You Have Diabetes
Can wearing trainers too much damage your feet?
Hallux Rigidus (stiff toe) - a simple explanation
How Shoes Change Your Feet – Squat University
Keeping your feet healthy – why this is important to know
All the important details when it comes to impregnating your shoes
Proper fitting shoes: MedlinePlus Medical Encyclopedia
Why Does My Big Toe Hurt?
Shoe size – the key to a perfect fit