These gels help the body sweat more in stubborn areas like your belly or thighs. Apply before exercise: Coat targeted areas with an even, generous layer right before your workout. Do not rub in: Leave the gel sitting on top of the skin rather than rubbing it all the way in. Skip the lotion: Never apply the gel over other creams or lotions. This keeps the gel thick and effective. Use a wrap: For the best results, put on a neoprene waist trimmer or wear compression gear over the gel. Wash off later: Let your body cool down after your workout. Towel off the extra gel before taking a shower. Store properly: Keep the gel out of the hot sun or your car. It melts in warm temperatures. designed to increase perspiration in the area where they’re applied. What they do: Create a warming or cooling sensation Temporarily increase sweating May help reduce water retention for a few hours Can make the skin look tighter temporarily What they do NOT do: Burn body fat Cause permanent inch loss Replace diet and exercise Common ingredients include menthol, eucalyptus, camphor, or capsicum (pepper extract).