Weight loss primarily depends on maintaining a calorie deficit, which means consuming fewer calories than you burn. While cardio exercises can help create a calorie deficit by burning extra calories, you can still achieve weight loss through dietary changes alone. Focus on portion control, choosing nutrient-dense foods, and monitoring calorie intake to create a deficit without relying on cardio exercises. However, incorporating strength training or resistance exercises can also aid in weight loss by building muscle mass, which boosts metabolism and helps burn calories even at rest.