{"id":14855,"date":"2026-07-15T09:19:32","date_gmt":"2026-07-15T02:19:32","guid":{"rendered":"https:\/\/www.infinitysport.asia\/news\/?p=14855"},"modified":"2026-07-15T09:19:35","modified_gmt":"2026-07-15T02:19:35","slug":"does-sniffing-chocolate-really-help-leg-day-at-the-gym","status":"publish","type":"post","link":"https:\/\/www.infinitysport.asia\/news\/does-sniffing-chocolate-really-help-leg-day-at-the-gym\/","title":{"rendered":"Does sniffing chocolate really help \u2018leg day\u2019 at the\u00a0gym?"},"content":{"rendered":"\n<figure class=\"wp-block-image alignwide\"><img decoding=\"async\" src=\"https:\/\/images.theconversation.com\/files\/747653\/original\/file-20260714-57-4zqc12.jpg?ixlib=rb-4.1.0&amp;rect=0%2C221%2C2121%2C1193&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip\" alt=\"Man, eyes shut, sniffing chocolate bar.\"\/><figcaption class=\"wp-element-caption\"><a href=\"https:\/\/www.gettyimages.com.au\/detail\/photo\/studio-portrait-of-enjoying-young-man-savoring-rich-royalty-free-image\/2236880691\"><em>dikushin\/Getty<\/em><\/a><\/figcaption><\/figure>\n\n\n\n<p class=\"\">Simply smelling chocolate can boost your gym workout, according to a recent study that\u2019s generated headlines around the world.<\/p>\n\n\n\n<p class=\"\">No eating, no calories, just smelling.<\/p>\n\n\n\n<p class=\"\">The journal claimed:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"\">Sniffing chocolate could make your leg day workout easier, even on an empty stomach.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"\">Headlines followed, including:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"\">Sniff chocolate, do more reps without trying harder!<\/p>\n<\/blockquote>\n\n\n\n<p class=\"\">This came with the qualifier:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"\">We\u2019re not even kidding. It\u2019s a psychobiology thing.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"\">But is all this too good to be true? Does the research check out? I\u2019m an exercise scientist and here\u2019s my verdict.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What the researchers did<\/h2>\n\n\n\n<p class=\"\">The study recruited 23 young men who had been doing resistance training at least twice a week for the past two years. So, although they weren\u2019t elite athletes, they were diligent gym-goers.<\/p>\n\n\n\n<p class=\"\">Resistance training is when you work your muscles against a load. This can be lifting weights, using machines, or using your own bodyweight.<\/p>\n\n\n\n<p class=\"\">In this study, the men used the leg extension machine. This is where you sit down, hook your shins under a padded bar, and straighten your knees against a weight (like a kicking motion). <\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Exercise: Leg Extension Machine\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/xcFhzxpRr7Y?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"\">In the study, each participant came into the laboratory three separate times after fasting overnight for roughly ten hours.<\/p>\n\n\n\n<p class=\"\">On each visit they sniffed a jar containing one of three things (in a random order) for 30 seconds:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">a 90% cocoa dark chocolate mixture<\/li>\n\n\n\n<li class=\"\">a 60% cocoa milk chocolate mixture<\/li>\n\n\n\n<li class=\"\">plain distilled water (the control).<\/li>\n<\/ul>\n\n\n\n<p class=\"\">Then they jumped onto the leg extension machine and did as many sets of ten reps (repetitions) as possible at a weight that corresponded to 80% of their ten rep maximum. That\u2019s 80% of the heaviest weight they could lift ten times. They sniffed the jar between each set.<\/p>\n\n\n\n<p class=\"\">They kept going until they felt they could not complete another set.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What they found<\/h2>\n\n\n\n<p class=\"\">Across all the sets, the participants managed to complete roughly 18 more reps with dark chocolate and roughly nine more with milk chocolate, compared to sniffing water.<\/p>\n\n\n\n<p class=\"\">This means sniffing dark chocolate improved their performance by more than 25%, which is quite substantial.<\/p>\n\n\n\n<p class=\"\">By comparison, we know from other studies that caffeine increases resistance training by about one repetition per set on average. This is much less than the current study found.<\/p>\n\n\n\n<p class=\"\">The participants also rated how hungry the smells made them feel compared to sniffing water. Dark chocolate made them feel less hungry, while milk chocolate didn\u2019t impact their hunger. For what it\u2019s worth, participants said milk chocolate smelt nicer than both water and dark chocolate.<\/p>\n\n\n\n<p class=\"\">The authors suggested that, because hunger competes for your attention, it can reduce your gym performance. So, the smell of dark chocolate might trick your brain into feeling fuller, allowing you to exercise harder.<\/p>\n\n\n\n<p class=\"\">The exact reason why dark chocolate had a larger effect than milk chocolate is unclear. But the authors suggest that the rich smell of dark chocolate might have been quite familiar to the participants, which could have made them feel fuller.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-x wp-block-embed-x\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Researchers in Malaysia have found a bizarre link between dark chocolate and working out at the gym. They say sniffing dark chocolate could help you to feel more full and increase reps, whereas smelling milk chocolate could make the workout more enjoyable. <a href=\"https:\/\/x.com\/hashtag\/Chocolate?src=hash&amp;ref_src=twsrc%5Etfw\">#Chocolate<\/a>\u2026 <a href=\"https:\/\/t.co\/QG4QGbUglc\">pic.twitter.com\/QG4QGbUglc<\/a><\/p>&mdash; 7NEWS Queensland (@7NewsBrisbane) <a href=\"https:\/\/x.com\/7NewsBrisbane\/status\/2075485181570408936?ref_src=twsrc%5Etfw\">July 10, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Hang on a minute<\/h2>\n\n\n\n<p class=\"\">But there is one large limitation that needs to be acknowledged.<\/p>\n\n\n\n<p class=\"\">The study is described as a double-blind trial, which implies the participants don\u2019t know which \u201cintervention\u201d they are getting. But the control was water, and water doesn\u2019t smell. This means every participant probably knew which one was chocolate, and which was the control.<\/p>\n\n\n\n<p class=\"\">The main performance measure was also how many reps you could do before you <em>decide<\/em> to stop. This is not exactly a test of performance. It is a test of how hard you are willing to push yourself.<\/p>\n\n\n\n<p class=\"\">So it is highly likely the results were impacted by the participants\u2019 knowledge of the study goals, and what the control condition was.<\/p>\n\n\n\n<p class=\"\">This may explain why the effect was even larger than what we would see with something like caffeine, when it probably shouldn\u2019t be.<\/p>\n\n\n\n<p class=\"\">To be fair, the authors acknowledge these limitations in their paper. They also describe their study as \u201cexploratory\u201d. Nevertheless, their conclusions are oversold a bit. So we cannot say sniffing chocolate boosts your gym workout based on this study.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How does this fit with other research:<\/h2>\n\n\n\n<p class=\"\">To my knowledge, this is the only study that looks at whether smelling chocolate improves weight training. But we do have some other, related lines of research.<\/p>\n\n\n\n<p class=\"\">First, we know hunger can negatively impact performance in the gym. And eating something (even something without any \u201creal\u201d calories, such as no-calorie jelly) can improve performance.<\/p>\n\n\n\n<p class=\"\">However, this seems to be related to having a substantial amount of food in your stomach, rather than any specific food.<\/p>\n\n\n\n<p class=\"\">Most research about chocolate and exercise is about eating it, not smelling it. Dark chocolate contains flavanols which are thought to improve exercise performance. However, the research consistently shows that eating chocolate before exercise has no positive effects.<\/p>\n\n\n\n<p class=\"\">Second, rinsing your mouth with sweet carbohydrates (sugar water) improves gym performance. That\u2019s likely because it stimulates receptors in the mouth that affect pathways related to motivation in the brain. In turn, this reduces how hard someone thinks they are working, making exercise feel easier. Although this is quite different to smelling something.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">So should I sniff chocolate?<\/h2>\n\n\n\n<p class=\"\">If you enjoy the smell of chocolate, then taking a sniff before you train is not going to have any downsides.<\/p>\n\n\n\n<p class=\"\">Just don\u2019t expect it to have a huge impact on your performance.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-small-font-size\"><a href=\"https:\/\/theconversation.com\/profiles\/hunter-bennett-1053061\">Hunter Bennett<\/a>, Lecturer in Exercise Science, <em><a href=\"https:\/\/theconversation.com\/institutions\/adelaide-university-6678\">Adelaide University<\/a><\/em><\/p>\n\n\n\n<p class=\"has-small-font-size\">This article is republished from <a href=\"https:\/\/theconversation.com\">The Conversation<\/a> under a Creative Commons license. Read the <a href=\"https:\/\/theconversation.com\/does-sniffing-chocolate-really-help-leg-day-at-the-gym-287475\">original article<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Simply smelling chocolate can boost your gym workout, according to a recent study that\u2019s generated headlines around the<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[6],"tags":[48,129],"class_list":["post-14855","post","type-post","status-publish","format-standard","hentry","category-health","tag-exercise","tag-gym"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Simply smelling chocolate can boost your gym workout, according to a recent study that\u2019s generated headlines around the world. 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