Strength Training With and Without Blood Flow Restriction on Shoulder Muscle Strength in Healthy Adults

The goal of this clinical trial is to compare two types of shoulder strength training: low-load training with blood-flow restriction (BFR) and high-load training without BFR. The study includes healthy adults. The main questions it aims to answer are: Are changes in shoulder strength, power, endurance, and muscle mass similar with low-load BFR and high-load training? Researchers will compare strength training with BFR to strength training without BFR to see whether changes in shoulder muscle performance are similar. Participants will: * Provide basic personal details, body measurements (e.g., height and weight), and a brief medical history before starting. * Train in one of the two programs (BFR or no BFR) two times per week for 4 weeks. * Complete tests of shoulder maximum strength, power, endurance, and muscle mass at the start and at the end of the protocol.