The term "slimnasticses" may be a relatively unknown word, but there are certainly other ways to express the concept of physical activity with the goal of slimming down. Some possible synonyms might include "weight loss exercises," "trimming workouts," or "toning routines." Other related terms could include "aerobic activity," "cardio," or "fat-burning exercise." Additionally, some people may use more specific terminology like "yoga for weight loss," "HIIT workouts," or "strength training for toning." Ultimately, there are many ways to describe the various forms of physical activity that can contribute to overall health and fitness, whether the goal is losing weight or simply staying in shape.