Combining dumbbells, I always suggest that everyone should consider three aspects of aerobic, strength and stretching in fitness. However, when you first buy fitness equipment at home, you really don't need to consider treadmills and elliptical machines, because aerobic exercise can be replaced by running outside or doing aerobic exercise at home. Believe me, the utilization rate of large household aerobic fitness equipment is really low. Dumbbells are really a killer for home strength training. However, don't buy dumbbells with fixed weight, don't buy dumbbells with fixed weight, don't buy dumbbells with fixed weight, it is important to say it three times! Because the difficulty of strength training needs to be gradually enhanced, the combination dumbbell allows you to choose the difficulty and intensity according to your own situation, step by step! On the contrary, it is really difficult to make progress with the same weight load for a long time.