Yes, improving muscular strength without lifting weights is possible. Bodyweight exercises, such as push-ups, squats, and lunges, can effectively build strength. These exercises use the weight of the body itself as resistance, stimulating muscle growth and strength increases in a similar way to weightlifting.
Resistance bands, suspension training systems, and yoga are other weight-free modalities that can contribute to enhanced strength. While weightlifting can provide faster strength gains, these alternatives offer versatility and convenience, particularly for individuals with limited access to gym equipment or who prefer to exercise at home.