The leg press is an effective exercise for developing lower body strength and muscle endurance. It primarily targets the quadriceps (front of the thighs), hamstrings (back of the thighs), and glutes (butt muscles) while also engaging the calf muscles to some extent.

Twist trainers are effective tools for developing core strength and muscle endurance. They primarily target the obliques (sides of your abdomen), abdominals (belly muscles), and lower back muscles while also engaging muscles in your hips to some extent.