madelyn fernstrom puts us to the test. >>> hi, i'm meteorologist kim cunningham with a look at the next the story continues to be the heat, the drought for the central u.s. for the east coast, we may be seeing a few changes coming your way with some rain and cool err temperatures, too. but at least for today, expecting maybe some thunderstorms that could be severe anywhere wisconsin back towards nebraska with a front coming through, that's going to cool us down but it could bring severe storms maybe even ice lated tornadoes. look at the temperatures we're dealing with, 98 in chicago, 104 in kansas city, maybe a few record highs with this. but rainfall should be light with some of these storms coming through. that's about it. thursday with the front moving in, chicago expect temperatures to come down and we'll see the storms heading toward maybe new york city and boston. so there could be airport delays. here are the hubs being affected. we'll see the cooldown in chicago, 88 degrees, 93 in new york until the front comes through, 97 in kansas city, feeling some relief with some of the clo

madelyn fernstrom is here to test us. >> we are going to start with low-fat frozen yogurt.w fat yogurt. does this serving, 1/2 cup have more or less than 100 calories. >> it has more. >> it has more. 140 with nothing else. be careful when you dump that in your bowl. >> people assume they're saving all these calories, and they are not, right? >> that is true. beware especially with toppings. now the other extreme for ice cream lovers. banana split, how many miles to burn this off, six miles, nine miles, 12 miles? >> kathie lee? >> nine. >> i'm sorry. let me hit my buzzer. >> i'm going to go with 12. >> you're right. it has 1,200 calories. >> then don't eat it! >> share it with a bunch of other people. check out some of these lower calorie favorites. one of them has more than 100 calories, skinny cow ice cream sandwich, weight watchers bar or italian ice? one of them has more than. >> it's going to be the skinny cow. >> you are right. >> the woman knows her sweets! >> sometimes skinny in the title doesn't mean the lowest calories. >> but they are tasty. >> i've never had any

. >> with us is madelyn fernstrom. sara is at the nbc experience store to round up some questions.a? >> our first question is from a dad/daughter combo. first question from dad. >> i've been trying to lose weight forever. i know what i can't do, i know what i can't eat, but i don't have the motivation. where do you get motivation? >> the biggest thing with motivation, it's hard to lose weight or even stay on track. but we think about losing weight. that's not the action verb. action verb is small steps changing your eating, small steps in physical activity and having the mindset that small achievements really count. i ate one more fruit today than yesterday. that's huge. i walked 30 minutes all week. we don't think they're a big deal, but these baby steps add up every day to help keep you motivated. you need support from others. that's important, too. >> you told us years ago if you just cut out 100 calories a day, you will have lost 10 pounds in a year. pf that is exactly right. >> anybody can cut out 100 calories. >> and that's a real achievement. but we set our goals so high we

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raj, an nbc contributor and madelyn fernstrom, diet and nutrition editor. qsymia is a combination of two drugs, one used to suppress appetite, the other for seizures. how does the combo pill work? >> it's to actually bathe the p brown in two kinds of signals. phentermine is a stimulant that reduces appetite, reduces hunger signals. the other for seizures. people were losing weight. by suppressing brain activity so you don't get seizures it reduces appetite. something in low effective doses gives a one-two punch to give you that combination. >> talk about trials, 37,000 people studied, some took a placebo. >> actually 3700 people. >> all right. 3700. okay. >> what they found was the majority of people had weight loss between 6 and 9% of their body weight is lost, which is considered significant when we're talking about weight loss drugs. >> were they also dieting and exercising but only with the pill. >> absolutely, dieting and exercising, something to be used in conjunction. >> doesn't replace. lifestyle is key. it doesn't take away your appetite all togeth

mad l madelyn fernstrom is here to test us. >> we are going to start with low-fat frozen yogurt. you dump that in your bowl. >> people assume they are saving all these calories, and they are not, right? >> that is true. beware especially with toppings. banana split, how many miles to burn this off, six miles, nine miles, 12 miles? >> 9. >> hoda? >> i'm sorry. i'm going to go with 12. >> you're right. it has 1,200 calories. >> share it with a bunch of other people. check out some of these lower calorie favorites. one of them has more than 100 calories, skinny cow ice cream sandwich, weight watchers bar or italian ice? >> it's going to be the skinny cow. >> you are right. >> sometimes skinny in the title doesn't mean the lowest calories. >> but they are tasty. >> an oldie but goody. klondike bars. 250 calories in the original. how many calories does the no sugar added have, 130, 170 or 210? >> here you go. >> you got it. >> 130. >> no. >> 170 or 210? >> 170. >> it is 170. >> you save 80 calories. >> we are going to go around the world. sorbet, gelato and sherbert. one does not cont