This study investigates the bone health of women who play fast-pitch softball as pitchers. The purpose is to understand if these athletes have better bone health at the hip compared to others. The study will look at how the exercise involved in pitching affects the proximal femur, which is the upper part of the thigh bone that fits into the hip joint.

Participants will undergo procedures to assess their bone health. This may involve scans or tests to measure bone density and strength, although specific procedures are not detailed in the description.

• Who can participate: Female collegiate-level fast-pitch softball pitchers who have been playing for at least 5 years can participate. They should have started pitching before their adolescent growth spurt and continued for at least two years after. Participants must not have any metabolic diseases or recent fractures.
• Study details: Participants will be involved in assessments of their bone health, which may include scans or tests. They will be compensated for their participation. An inactive substance that looks like the investigational medicine/vaccine but does not contain any medicine may be used as a placebo, if applicable.