Hi welcome to HCm Though your night sweats is a matter of concern but not a cause to worry . Thats good you have attained your target of obessity to normal . But dear , over enthusism can spoil the broth . Your night sweats are sign of drop in your body strength . When you exercise at a higher intensity than usual, your thyroid releases more hormones to help fuel the increased activity and raises your body temperature, which can trigger a bout of night sweats -- especially if you don t allow enough time to cool down afterward. Good news is that night sweats are very rarely serious You must now cut down on gym and come back to normal regime of workouts - walk , exercise ,Yoga , deep breathing - Inhale - Hold - Exhale - Hold - and meditation and balanced diet including essential nutrients -fibers ,vitamins ,minerals green veges , fruit ,cheese ,milk , butter milk etc for better health and maintain your weight and required strength . If problem persists or worsen ,rush to your Doctor ASAP Hope this helps solves your query .Take care , All the best . Don t hesitate to get back if have any further query