The new study examined recent stretch marks and found that they had a higher density of hormone receptors than normal skin, and estrogen appeared to be the most concentrated. Since estrogen is involved in skin healing, that could represent the body’s attempt to heal the injured skin tissue. From the standpoint of steroid users, the greater number of estrogen receptors in stretch marks could also represent a defense against the high level of androgens, which interfere with skin healing. That latter part, however, is strictly speculation. What is known is that stretch marks have a higher density of hormone receptors than normal skin.
Sting returned to singles matches in 1989, starting the year off by wrestling Flair to a one-hour draw in Atlanta's Omni on New Year's Day. He would also have his first experience in Japan with a brief tour in All Japan Pro Wrestling , with his most notable match in AJPW against Dan Spivey on January 25. After a long push, Sting won his first title in the NWA when he defeated Rotundo for the NWA Television Championship at a live event in March.  Sting defended the Television title actively but tended to face sub-par challengers such as The Iron Sheik . In mid-1989, The Great Muta challenged Sting at The Great American Bash . The match was booked with a classic, controversial Dusty finish even though Rhodes (the namesake of the technique) had been fired months earlier. Sting got the three-count and was announced as the winner, but a replay showed Muta's shoulder was up at the count of two. The NWA decided to declare the title vacant.  Sting and Muta battled in many rematches for the vacant Television title, but they always ended in disqualification, giving neither man the championship. Eventually, Muta won a No Disqualification match against Sting at a live event in September by using a blackjack to get the win and the title.