Movements were performed at an angular velocity of 60 deg/s, and the peak torque of leg extension was recorded to one-tenth of a newton-meter (Nm). Graft choice, tourniquet use, time to surgery, and all other surgical decisions were left to the normal practice of the orthopaedic surgeon. Informed consent documentation included a discussion of the possible but uncommon risks of testosterone such as allergic reactions, liver function test alterations, breast tenderness, hair growth or loss, polycythemia, and mood or mental changes. Serum testosterone was measured to the nearest one-tenth (ng/dL) by a competitive radioimmunoassay using a solid-phase polyclonal antibody. All participants followed a standard-of-care, structured rehabilitation protocol, as determined by a licensed physical therapist, beginning shortly after surgery. Your healthcare provider can help you stay on top of your bone health. You may never know you have it until you suddenly break a bone. But osteoporosis isn’t always preventable. Talk to your healthcare provider if you’re worried about your risk of falls or bone fractures. Broken bones can always cause complications. You can prevent bone density loss with treatments and exercise. The relation between testosterone replacement therapy (TRT) and anterior cruciate ligament injury risk has garnered attention in recent orthopaedic research. Your provider will discuss your health history with you along with the results from your tests to determine if you could benefit from testosterone therapy. You can start therapy as soon as your blood tests come back with evidence of low testosterone and your provider has determined you are a good candidate for treatment. Your provider will order additional tests to help determine the cause of your low testosterone levels and rule out any underlying health issues that could affect (or prevent) your treatment. Although the present study was sufficiently powered for the outcome of lean mass, the small sample size and wide age range of patients selected may have contributed to a failure to document differences in baseline leg strength and other factors affecting clinical outcomes. Prior research has suggested that perioperative supraphysiological testosterone supplementation may improve clinical outcomes, including rehabilitation milestones such as early standing after knee replacement surgery.2 The present study also did not find a significant difference in postoperative strength of the injured leg between the testosterone and placebo groups. Our results suggest that testosterone therapy may be useful as an adjunct to postoperative physical therapy in eugonadal patients by causing an increase in lean mass that persists for an extended period without residual disturbance of baseline serum testosterone levels. Nonetheless, the trauma of surgical repair and postoperative mobility limitations can exacerbate the loss of muscle mass and strength, which may prolong the already arduous rehabilitation process and potentially impair long-term outcomes.3,24 One study reported that 60% of patients undergoing ACL reconstruction did not return to preinjury activity levels within 2 years.17 However, this does not take into account patients who never took the actual testosterone. The database infers that patients were on testosterone from a prescription that was filled. While bone–implant integration is a critical aspect of RSA success, this study was unable to account for uncemented vs. cemented implants. Acnes on the epidermis of patients, as testosterone has previously shown to increase this . They’ll tell you how often you’ll need follow-up bone density tests. Your provider might suggest weight-bearing exercise to strengthen your muscles and train your balance. Staying active can strengthen your bones. The most important part of treating osteoporosis is preventing broken bones. Providers sometimes refer to bone density tests as DEXA scans, DXA scans or bone density scans. People in postmenopause lose bone mass even faster. This causes a gradual loss of bone mass. Further investigation is necessary to determine the safety profile and effects of perioperative testosterone administration on leg strength and clinical outcomes after surgery. The purpose was to investigate the effect of perioperative testosterone administration on lean mass after ACL reconstruction in men and to examine the effects of testosterone on leg strength and clinical outcome scores. Particularly, prior research surrounding hormone therapy has shown that bone mineral density may be increased only in patients who have baseline testosterone levels below the reference range . Additionally, the relatively young age of the participants could have influenced the magnitude of the lean mass increases seen in this study, and these results may be less generalizable to older patients.9,17,22,28,43 Finally, this study was limited to nonprofessional athletes, as testosterone is a banned substance as defined by the World Anti-Doping Agency’s prohibited list. The purpose of this randomized controlled trial was to determine if weekly testosterone administration, beginning 2 weeks before surgery and ending 6 weeks after surgery, could effectively prevent short-term catabolic loss of lean mass in patients undergoing ACL reconstruction and structured rehabilitation. It was hypothesized that testosterone would increase lean mass and leg strength and improve clinical outcome scores relative to placebo. The 5 studies showed heterogeneity in patient populations, procedure type, dosage, duration, testosterone therapy protocol, clinical outcomes, and follow-up duration. This increase in lean mass was found to persist after the return of serum testosterone levels to baseline. Patients receiving an 8-week course of 200 mg/wk of testosterone cypionate were found to have a greater increase in lean mass at 6 weeks after ACL reconstruction compared to patients administered placebo. However, because safety was not a primary or secondary outcome of this study, future studies specifically investigating the safety of testosterone administration in patients undergoing ACL surgery are necessary to conclusively determine the safety of perioperative testosterone supplementation in this population. Effect of testosterone on the change in strength of the uninjured leg from baseline. Baseline lean mass was measured at 2 weeks before surgery and normalized to 0. Line plot of testosterone levels at 2 weeks before surgery; 1 day before surgery; and 2, 6, 12, and 24 weeks after surgery. Intramuscular testosterone has been shown to increase muscle mass and strength, independent of exercise, and could conceivably prevent muscle loss after surgical reconstruction of the ACL.8,45,54 This study was not powered to detect differences in strength or clinical outcome scores to assess the incidence of testosterone-related adverse events. Prior studies have shown that preoperative rehabilitation may improve muscle strength and postoperative outcomes.