6. Tingly or Numb Hands
What it could mean: Long bike rides can pinch the ulnar nerve in your hands, causing muscle weakness and pain. If you haven’t hopped on a cycle in a decade, you may have carpal tunnel syndrome, says C. David Geier, Jr., MD, director of sports medicine at the Medical University of South Carolina.
When to see a doctor: If hands get numb or tingly while you’re asleep or during routine activities other than sports or exercise, says Dr. Geier. Treatment may include anti-inflammatory drugs, steroidal injections or exercises. Your doctor may suggest surgery in severe cases.