Maintaining a strong core is crucial for overall fitness and stability, even when you're not using a squat machine. Incorporate exercises like planks, mountain climbers, and Russian twists into your routine. Planks engage your entire core, while mountain climbers add a cardio element. Russian twists enhance rotational strength. Include leg raises and bicycle crunches to target lower abs and obliques. Consistent core work helps with balance and supports your spine during other exercises. Aim for at least three core-focused sessions per week to build strength and improve your overall fitness. Stay dedicated, and you'll notice the benefits in your daily activities.