“…Among Japanese women, shoulder stiffness is reported to be most prevalent, and back pain is the second most common symptom among women in their 30s to 40s (Ministry of Health, Labour and Welfare (Japan), ). Specifically among Japanese postpartum women, the prevalence is reported to be approximately 80% for shoulder stiffness (Koyasu & Matsuo, ), 50% for back pain (Fukuyama et al, ; Nakazawa, Takamuro, Yamanaka, & Yoshimura, ), and 35% for wrist pain (Satoh, Herrera, Nakagawa, Sakakibara, & Ohashi, ). These physical symptoms are generally accompanied with a certain degree of pain, discomfort, or limited motions.…”