Stress can make you stronger. You can expand your emotional capacity, build resilience, and find calm amid life’s challenges.

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

Smiles do more than express emotion - new research shows they can unconsciously influence trust and shape how we perceive others.