Start with high-confidence men's health books, then narrow by subgenre or adjacent topics.
Body for Life
Bill Phillips, Michael D'Orso
The Complete Book of Pilates for Men
Daniel Lyon
The Expectant Father
Armin A. Brott, Jennifer Ash Rudick
The Testosterone Syndrome
Eugene Shippen, William Fryer
Dr. Patrick Walsh's Guide to Surviving Prostate Cancer
Patrick C. Walsh MD MD, Janet Farrar Worthington