Allah has given us many gifts. One of those gifts is our health. And to keep a good health it is important that we exercise regularly. Often times what husbands find appealing of their wife is that she is in good shape. So when a wife exercises she is speaking to her husband that she loves him. Most men are wired by vision. So a wife who keeps herself in shape will maybe have an easier task to keep her husbands attention. That will probably lessen the temptation the husbands meet outside the home. It’s part of the sunnah that a husband and a wife beautify themselves for each other. With the right intention this can also become an act of worship. Because you could exercise to take care of the blessing of your body God has given you and because you want to stay attractive for your husband, to keep him safe from falling into temptation/sin.
Roshnii179 