11 Best Underwear for Working Out, Approved by Ob-Gyns & Trainers 2026

Best for Hot Yoga: Knix Leakproof Thong”,”dek”:[“div”,[“ul”,[“li”,[“strong”,”What we love:”],” Leakproof design for extra protection; moisture-wicking; seamless construction”],[“li”,[“strong”,”Worth noting:”],” Higher price point; limited style variety”]],[“p”,”Knix makes some of the “,[“a”,{“href”:”https://www.glamour.com/gallery/best-period-underwear”,”target”:”_blank”},”best period underwear”],” around—with options that feel less like a diaper and more like sleek, streamlined undies. Their leakproof thong, for instance, is great to wear while working out on your period or for very sweaty workouts like hot yoga. “,[“a”,{“href”:”https://kristielarson.com/”,”target”:”_blank”,”rel”:”nofollow”},”Kristie Larson”],”, a strength coach in New York City, swears by it for extra backup. “It absorbs sweat, so it’s perfect under lighter leggings any time of the month.””],[“ul”,[“li”,[“strong”,”Sizes:”],” XS–4XL”],[“li”,[“strong”,”Materials:”],” Layers of nylon, spandex, modal, seaweed, and polyester”]]],”hasContextualCaption”:true,”functionalTags”:[],”id”:”649b031eaa366dbb5f41fd8d”,”image”:{“altText”:”Knix Leakproof NoShow Thong”,”caption”:””,”contentType”:”photo”,”credit”:”Courtesy of brand”,”segmentedSources”:{“sm”:[{“height”:427,”width”:320,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_320,c_limit/Product%20(12).png”},{“height”:853,”width”:640,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_640,c_limit/Product%20(12).png”}],”md”:[{“height”:960,”width”:720,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_720,c_limit/Product%20(12).png”},{“height”:1920,”width”:1440,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_1440,c_limit/Product%20(12).png”}],”lg”:[{“height”:997,”width”:748,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_748,c_limit/Product%20(12).png”},{“height”:1995,”width”:1496,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_1496,c_limit/Product%20(12).png”}],”xl”:[{“height”:997,”width”:748,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_748,c_limit/Product%20(12).png”},{“height”:1995,”width”:1496,”url”:”https://media.glamour.com/photos/696815990f85cc674cb2eb18/3:4/w_1496,c_limit/Product%20(12).png”}]}},”hasNativeImgLazyLoading”:true,”isHedClickable”:false,”isPromotion”:null,”name”:”Knix Leakproof No-Show Thong”,”offers”:[{“offerUrl”:”https://knix.com/products/leakproof-thong”,”price”:”$27″,”currency”:”USD”,”purchaseUri”:”https://cna.st/p/2Cd7yruAyULCVnsYRvAmSNYyJhyUmzowi1SPPm2PZWeADpXfoPt9mpZfJJiMKkU44YHDKZUkosa1FqoXXx4CpxEpbRnEVttegsTQqPRXUFFJpA1pizEqKNJSVAupwwrq8xtPLJtswBhA7X2z97cxBcfHJzxfsj7cviQdHFNx3KDngbG4hLLrXW9xJQ6yVc8DCVbDvaZ3F3xCAAAsjYCN7NvYQcYd447yYGJgnRVhKNzyKh4acb1ZJfaMuYVp5mHnHyKARfhecQRLa4APLeTDczrpQZ1dB6sChBZWrbviU5kn5hVdPMGktKSpvoo7pk5MitjXh51pCAzmrawTWUUUVK62y2xRWZfWNYakvVpyHw8wVJdW1VzgeBUtcA1L9KZtAgQCeq7MmfpG8toc4pnhxNr9jKvS9x8hNAD4vepk9YPC”,”sellerName”:”Knix”,”countryCode”:”US”,”offerId”:”66fd6f0eadea34ef0838825b”,”reducedPrice”:””}],”promotionHed”:null,”promotionText”:null,”socialIconsProps”:{“links”:[{“network”:”Pinterest”,”label”:”Post to Pinterest”,”url”:”https://www.pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.glamour.com%2Fgallery%2Fbest-underwear-for-working-out&media=https%3A%2F%2Fmedia.glamour.com%2Fphotos%2F696815990f85cc674cb2eb18%2Fmaster%2Fw_1200%2Cc_limit%2FProduct%2520(12).png&description=Knix%20Leakproof%20No-Show%20Thong”}]},”itemSocialSharesProps”:{“showBookmark”:false,”links”:[]},”showLocalisedOffers”:true,”hasCheckPriceFeature”:false,”isUpcEnabled”:true,”isVenueUPCEnabled”:false,”index”:8,”showClampedProductDescription”:true,”hasReadMoreFeature”:false,”productDescriptionLineLength”:10,”isMobileView”:false,”showMultipleImageCount”:4,”hasProsConsFeature”:false,”hasRatingFeature”:false,”pros”:[],”cons”:[],”rating”:””,”subtype”:null,”shouldUseAmazonPrimeDayLiveAPIData”:true,”textBadge”:null,”seal”:null,”order”:8,”totalCount”:11,”preHeaderOne”:”9/11″,”showOrderedGallery”:false,”hasAffiliateLinkDisabled”:false,”layout”:”ProductEmbed”,”component”:”unified_product_card”,”total_index”:1,”hasMultipleImage”:false,”showProsConsData”:false,”videoIds”:[],”offersLength”:1}”>

Best for Hot Yoga: Knix Leakproof Thong

Best for Cycling: Underoutfit Smoothing At Waist Boyshort”,”dek”:[“div”,[“ul”,[“li”,[“strong”,”What we love”],”: Prevents thigh chafing; plus sizing; has built-in tummy control”],[“li”,[“strong”,”Worth noting:”],” Panty lines may show under tight leggings”]],[“p”,”Boyshorts offer a lot more coverage than thongs or bikinis, which can be especially helpful during strength training and longer workouts. “These give more coverage and support, which is nice for squats, deadlifts, or cycling,” says Chakoian. “They’re soft, stretchy, and reduce friction between your thighs. The moisture-wicking material keeps you comfortable even in long workouts. You can move freely without constantly adjusting them.” The high-waisted shorts have a wide waistband as well that provides some tummy control and shaping under clothes.”],[“ul”,[“li”,[“strong”,”Sizes:”],” S–3X”],[“li”,[“strong”,”Materials:”],” 90% nylon, 10% spandex”]]],”hasContextualCaption”:true,”functionalTags”:[],”id”:”696904d7132c4a89b0c9b1c8″,”image”:{“altText”:”Underoutfit Smoothing At Waist Boyshort”,”caption”:””,”contentType”:”photo”,”credit”:”Courtesy of brand”,”segmentedSources”:{“sm”:[{“height”:427,”width”:320,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_320,c_limit/Product%20(19).png”},{“height”:853,”width”:640,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_640,c_limit/Product%20(19).png”}],”md”:[{“height”:960,”width”:720,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_720,c_limit/Product%20(19).png”},{“height”:1920,”width”:1440,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_1440,c_limit/Product%20(19).png”}],”lg”:[{“height”:997,”width”:748,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_748,c_limit/Product%20(19).png”},{“height”:1995,”width”:1496,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_1496,c_limit/Product%20(19).png”}],”xl”:[{“height”:997,”width”:748,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_748,c_limit/Product%20(19).png”},{“height”:1995,”width”:1496,”url”:”https://media.glamour.com/photos/69690550a09e0076f80adc93/3:4/w_1496,c_limit/Product%20(19).png”}]}},”hasNativeImgLazyLoading”:true,”isHedClickable”:false,”isPromotion”:null,”name”:”Underoutfit Smoothing At Waist Boyshort”,”offers”:[{“offerUrl”:”https://www.amazon.com/Underoutfit-Waist-Boyshorts-Shapewear-Control/dp/B0CW344RGN?th=1&psc=1″,”price”:”$25″,”currency”:”USD”,”purchaseUri”:”https://cna.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″,”sellerName”:”Amazon”,”countryCode”:”US”,”offerId”:”696905633df2d2e3e3634cf5″,”reducedPrice”:””},{“offerUrl”:”https://www.nordstrom.com/s/smoothing-at-waist-boyshort/8631800″,”price”:”$24″,”currency”:”USD”,”purchaseUri”:”https://cna.st/p/2SQUXCr65hrURAER1Hhie3nbSy5Nv2Q6G19tTa4FwfcC2b9rLKh95cqn48p9ecgab8vDkHW1JHSLEFi3F2yaZtjWpMRTukwdV1L7bUCHHPfuT8HAzh3niYjS8gmPiAEbWK1Q5ZuMrf3pKCSpV5MgBfjQawC4E2fgPFr3emkbRHHQWfGV568rFvs7ssqSkE4NSBqRZ5oxEb2i38BZ2vZP62Uz9LVRu4DwdymRybrT5dzGnYDxTij3J3DL22W4b6MBC1hMb2WJStoN4YseMbevySff9LgzkdFgahv1yoiwrEmVcQmLoDL6cb16Wk9HKaeL278nNH9ePyTcA9KmZCYiPHhRTGHZ3ztqsXErb2Sy2buQKqs9NRgeC3s153wuxG7u2Xz3VWxR7FAQW8QmfRY85psNUnPfJripo5DWykjbBVgyw4QwyBRNNc5BAAZ8QQzZusmqoWFHeJ”,”sellerName”:”Nordstrom”,”countryCode”:”US”,”offerId”:”696905633df2d2e3e3634cf6″,”reducedPrice”:””}],”promotionHed”:null,”promotionText”:null,”socialIconsProps”:{“links”:[{“network”:”Pinterest”,”label”:”Post to Pinterest”,”url”:”https://www.pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.glamour.com%2Fgallery%2Fbest-underwear-for-working-out&media=https%3A%2F%2Fmedia.glamour.com%2Fphotos%2F69690550a09e0076f80adc93%2Fmaster%2Fw_1200%2Cc_limit%2FProduct%2520(19).png&description=Underoutfit%20Smoothing%20At%20Waist%20Boyshort”}]},”itemSocialSharesProps”:{“showBookmark”:false,”links”:[]},”showLocalisedOffers”:true,”hasCheckPriceFeature”:false,”isUpcEnabled”:true,”isVenueUPCEnabled”:false,”index”:9,”showClampedProductDescription”:true,”hasReadMoreFeature”:false,”productDescriptionLineLength”:10,”isMobileView”:false,”showMultipleImageCount”:4,”hasProsConsFeature”:false,”hasRatingFeature”:false,”pros”:[],”cons”:[],”rating”:””,”subtype”:null,”shouldUseAmazonPrimeDayLiveAPIData”:true,”textBadge”:null,”seal”:null,”order”:9,”totalCount”:11,”preHeaderOne”:”10/11″,”showOrderedGallery”:false,”hasAffiliateLinkDisabled”:false,”layout”:”ProductEmbed”,”component”:”unified_product_card”,”total_index”:1,”hasMultipleImage”:false,”showProsConsData”:false,”videoIds”:[],”offersLength”:2}”>

Best for Cycling: Underoutfit Smoothing At Waist Boyshort

Best Under Leggings: Alo Airbrush Invisible Thong”,”dek”:[“div”,[“ul”,[“li”,[“strong”,”What we love:”],” Smooth fit; ultra-lightweight; seamless”],[“li”,[“strong”,”Worth noting:”],” Minimal coverage”]],[“p”,”For a truly no-show, barely there pair of underwear, go for this seamless pair from Alo, which UESCA-certified running coach and ISSA-certified personal trainer “,[“a”,{“href”:”https://www.instagram.com/adventure_runner_coaching”,”target”:”_blank”,”rel”:”nofollow”},”Liz Schmoll”],” calls a “good seamless option for everyday wear with odor control.””],[“p”,”“The seamless design sat flat, the sides didn’t twist under my clothing, and it felt cool and comfortable,” says Condé Nast vice president and health content lead “,[“a”,{“href”:”https://danaleighsmith.com/”,”target”:”_blank”,”rel”:”nofollow”},”Dana Leigh Smith”],”. “There was no bunching, even under tight-fitting leggings. They were very sweat-wicking, which kept me feeling comfy during my weight-training session.””],[“p”,”“They aren’t kidding when they call it invisible. This thong feels truly weightless and isn’t remotely visible under a pair of leggings,” says “,[“em”,”Glamour”],” contributor “,[“a”,{“href”:”https://www.glamour.com/contributor/kristine-thomason”,”target”:”_blank”},”Kristine Thomason”],”. “These quickly became my go-to workout underwear for Pilates classes, yoga flows, or any other workouts where I’d prefer to minimize panty lines “,[“em”,”and”],” uncomfortable wedgies.””],[“ul”,[“li”,[“strong”,”Sizes:”],” XXS–XL”],[“li”,[“strong”,”Materials:”],” Blend of nylon and elastane”]]],”hasContextualCaption”:true,”functionalTags”:[],”id”:”6799098de647a80ad279cdab”,”image”:{“altText”:”Alo Airbrush Invisible Thong”,”caption”:””,”contentType”:”photo”,”credit”:”Courtesy of brand”,”segmentedSources”:{“sm”:[{“height”:427,”width”:320,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_320,c_limit/Product%20(10).png”},{“height”:853,”width”:640,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_640,c_limit/Product%20(10).png”}],”md”:[{“height”:960,”width”:720,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_720,c_limit/Product%20(10).png”},{“height”:1920,”width”:1440,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_1440,c_limit/Product%20(10).png”}],”lg”:[{“height”:997,”width”:748,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_748,c_limit/Product%20(10).png”},{“height”:1995,”width”:1496,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_1496,c_limit/Product%20(10).png”}],”xl”:[{“height”:997,”width”:748,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_748,c_limit/Product%20(10).png”},{“height”:1995,”width”:1496,”url”:”https://media.glamour.com/photos/6968146a0f85cc674cb2eb16/3:4/w_1496,c_limit/Product%20(10).png”}]}},”hasNativeImgLazyLoading”:true,”isHedClickable”:false,”isPromotion”:null,”name”:”Alo Airbrush Invisible Thong”,”offers”:[{“offerUrl”:”https://www.aloyoga.com/products/a0082w-airbrush-invisible-thong-black”,”price”:”$28″,”currency”:”USD”,”purchaseUri”:”https://cna.st/p/Ex8ZcW1bYdwrfWCHNvHQ12c4o9Qvc4fqn8yhnbTEjVUKzCYAKbJJaURgjnhK3sd7Ug4zsdgfFcNWajMkL9t8paSCo2kEK63pwUSriogYLVnvXNQRWJBs3ATFq2WDrPffVhcoUfcBTBTYoWTvfr1jDezzdQzvoqEwNpMfGdJur2tBpf68aZY5YhMikk6YKX95HtXJnNYBWRZaT4Uu9PGjhCqihK1jHmpbMW3cQGVFfdCzjnsw9vEHyY3XaLXETpNUuLm8tcdmgi3z2fPvtbPFTCoN5rr6645dc3tfvJQgmWmeG4oaqkcenkDcNjrc32TSCZYSLtxxJ2YSJZyjvaicfvX5TR6dLPGfBLY5vfK9JAuJxX9f2qdSZw3kTxNL7XtedX69WBLrpk3h8LbzBsWPaRAU1GeEaLziBLHXEFjTYEjXnfJsbTCbqZYPRbD7gLLsjgnHHWkPS6zpe8FXxzW”,”sellerName”:”Alo”,”countryCode”:”US”,”offerId”:”67990ca3e647a80ad279cdaf”,”reducedPrice”:””}],”promotionHed”:null,”promotionText”:null,”socialIconsProps”:{“links”:[{“network”:”Pinterest”,”label”:”Post to Pinterest”,”url”:”https://www.pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.glamour.com%2Fgallery%2Fbest-underwear-for-working-out&media=https%3A%2F%2Fmedia.glamour.com%2Fphotos%2F6968146a0f85cc674cb2eb16%2Fmaster%2Fw_1200%2Cc_limit%2FProduct%2520(10).png&description=Alo%20Airbrush%20Invisible%20Thong”}]},”itemSocialSharesProps”:{“showBookmark”:false,”links”:[]},”showLocalisedOffers”:true,”hasCheckPriceFeature”:false,”isUpcEnabled”:true,”isVenueUPCEnabled”:false,”index”:10,”showClampedProductDescription”:true,”hasReadMoreFeature”:false,”productDescriptionLineLength”:10,”isMobileView”:false,”showMultipleImageCount”:4,”hasProsConsFeature”:false,”hasRatingFeature”:false,”pros”:[],”cons”:[],”rating”:””,”subtype”:null,”shouldUseAmazonPrimeDayLiveAPIData”:true,”textBadge”:null,”seal”:null,”order”:10,”totalCount”:11,”preHeaderOne”:”11/11″,”showOrderedGallery”:false,”hasAffiliateLinkDisabled”:false,”layout”:”ProductEmbed”,”component”:”unified_product_card”,”total_index”:1,”hasMultipleImage”:false,”showProsConsData”:false,”videoIds”:[],”offersLength”:1}”>

Best Under Leggings: Alo Airbrush Invisible Thong