With adequate fat loss muscular definition will be achieved in the peripheral and gradually toward the waist, hips, or thighs. Exercise will help burn calories and maintain lean body weight which can result in fat loss. Increases in muscle in specific areas can change the appearance of those areas but will not result in specific loss of body fat. If the muscle mass improvements out pace fat loss in a specific area, girth can be greater. Sauna and steam baths are effective for losing weight.
Any weight loss occurring in saunas or steam baths is fluid loss.
These fluids will be replaced and the weight will come back. Passive exercise machines can be used to reduce body weight. Many machines exists that are electronically powered, which do the work for you. These types of machines won't assist in weight loss or fat reduction. Often times more fat is gained back due to yo-yo dieting.