Growth hormones don’t boost performance, apparently.
The only problem is, I’m not sure anybody was claiming that they did boost performance. At least, not in the sense of improving skills, like hitting a baseball.
To a professional athlete, anything that helps them stay on the field is, in effect, a performance-enhancing drug; if you aren’t on the field, you aren’t performing.
Everything I’ve heard about HGH is about (1) recovering from injury more quickly, and (2) building up tendons, ligaments, etc. from the extra stress placed on them by radically increased muscle mass. From, say, steroids.
So this study doesn’t tell us much. But thanks, AP, for using a misleading headline that distorts what the article really says. It’s what they do best.