Which Exercises Can Lead to or Worsen Flat Feet?

Core Concept: It is not exercise itself that causes flat feet, but rather "Incorrect Technique + Chronic Loading + Muscle Weakness" that exacerbates the condition.

I. Activities That Strenuously Impact the Arch

• 1. Barefoot Jumping/Running on Hard Surfaces:
  Running or jumping rope barefoot or in thin-soled shoes (like canvas sneakers/slippers). Without cushioning, the arch is forced to collapse under impact.
• 2. Heavy Weightlifting (Squats/Deadlifts):
  Heavy loads combined with knee valgus (caving in) or shifted center of gravity to the inner foot can flatten the arch over time.
• 3. Long-Distance Running:
  When muscles fatigue, the foot tends to over-pronate. Without arch support, long runs can lead to functional arch collapse.
• 4. High-Frequency Impact:
  Jumping jacks or high knees. If arch strength is insufficient, each landing acts as a force that "flattens" the foot.
• 5. Multi-directional Sports:
  Basketball or badminton. Rapid stops and turns with unstable ankles cause the arch to compensate, leading to collapse.

II. Exercises That Improve Flat Feet

Arch-friendly activities that build strength:

• Non-weight-bearing: Swimming and cycling (less impact).
• Foot Strengthening: "Short foot" exercises, towel curls, and calf raises.
• Balance Training: Single-leg stands to activate small intrinsic muscles.