{"id":57095,"date":"2026-01-14T12:48:28","date_gmt":"2026-01-14T11:48:28","guid":{"rendered":"https:\/\/smartgroup.no\/?p=57095"},"modified":"2026-01-14T13:11:35","modified_gmt":"2026-01-14T12:11:35","slug":"improving-sit-ski-performance-and-comfort-with-spike","status":"publish","type":"post","link":"http:\/\/smartgroup.no\/en\/improving-sit-ski-performance-and-comfort-with-spike\/","title":{"rendered":"Improving Sit-Ski Performance and Comfort with Spike"},"content":{"rendered":"\n\n\n<h2 class=\"wp-block-heading\"><strong>How Biomechanics, Research, and User Experience Shape Adaptive Sit-Skiing<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This article explores sit-ski biomechanics of Spike and how research-driven design improves performance, comfort, and fatigue management for Spike users.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At SmartGroup, we develop adaptive sports equipment with one clear ambition: to help athletes move more efficiently, comfortably, and confidently, regardless of ability level.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One of our core products, <strong>Spike<\/strong>, is designed for double-poling cross-country skiing as well as off-season training. While Spike is already highly adjustable, research shows that even small changes in setup and support can have a significant impact on performance, fatigue, and overall enjoyment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To better understand these factors, we recently hosted <strong>Frederique Faasen<\/strong> as an intern at SmartGroup. During her internship, Frederique worked on a research project focused on the biomechanics of sit-skiing and the Spike user experience.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article summarizes the key findings from her work and explains how they translate into practical, evidence-based guidance for Spike users.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"1600\" src=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1.jpg\" alt=\"\" class=\"wp-image-57107\" srcset=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1.jpg 900w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1-450x800.jpg 450w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1-768x1365.jpg 768w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1-864x1536.jpg 864w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1-7x12.jpg 7w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1-441x784.jpg 441w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-1-1-150x267.jpg 150w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption class=\"wp-element-caption\">Frederique during one of her many bike rides around Oslo.<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"900\" height=\"1600\" src=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-900x1600.jpg\" alt=\"\" class=\"wp-image-57108\" srcset=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-900x1600.jpg 900w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-450x800.jpg 450w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-768x1365.jpg 768w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-864x1536.jpg 864w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-1152x2048.jpg 1152w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-7x12.jpg 7w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-990x1760.jpg 990w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-441x784.jpg 441w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-1000x1778.jpg 1000w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-150x267.jpg 150w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-3-1-scaled.jpg 1440w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption class=\"wp-element-caption\">Testing done at <a href=\"https:\/\/www.bhss.no\/om-senteret\/beitostoelen-healthsports-center\/\">Beitost\u00f8len Healthsports Center<\/a><\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why sit-ski biomechanics matter <\/strong>for Spike users<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sit-skiing places very high demands on the <strong>upper body and trunk<\/strong>, as propulsion relies almost entirely on the arms, shoulders, and core. Unlike standing cross-country skiing, there is no contribution from the lower body, which means: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Small inefficiencies quickly lead to fatigue<\/li>\n\n\n\n<li>Shoulder and arm load accumulates over time<\/li>\n\n\n\n<li>Equipment setup strongly influences force transfer<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Biomechanical research shows that <strong>seat position, pole length, trunk movement, and stability<\/strong> all play a major role in how efficiently an athlete can ski. Understanding sit-ski biomechanics of Spike is essential for optimizing equipment setup and reducing unnecessary energy loss during poling.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Research-driven insights from a Spike internship<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">During her internship at SmartGroup, Frederique combined:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A structured review of scientific literature on sit-skiing biomechanics<\/li>\n\n\n\n<li>User research with Spike athletes, focusing on fatigue, comfort, and stability<\/li>\n\n\n\n<li>Simplified biomechanical modeling to explore the effects of seat height and pole length<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The goal was to reduce the trial-and-error approach many recreational sit-skiers rely on, and instead provide <strong>clear, evidence-based guidance<\/strong> that is easy to apply in practice.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Spike users experience in practice<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">User feedback revealed a generally very positive experience with Spike, but also some recurring challenges:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fatigue most commonly develops in the <strong>shoulders and arms<\/strong><\/li>\n\n\n\n<li>Stability is usually good, but <strong>even slight imbalance increases effort<\/strong><\/li>\n\n\n\n<li>Many users rarely adjust their setup, despite its impact<\/li>\n\n\n\n<li>Trunk engagement strongly affects efficiency and endurance<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">One particularly important finding was that <strong>insufficient support leads to energy loss<\/strong>:<br>when athletes feel unbalanced, a significant part of their effort is redirected from propulsion to stabilizing the upper body.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Sit-ski biomechanics of Spike and practical setup<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Based on research, user feedback, and modeling, several clear recommendations emerged.<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Optimize seat height<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Seat height affects both reach and stability:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher seat \u2192 longer strokes and potential for higher speed<\/li>\n\n\n\n<li>Lower seat \u2192 increased stability and reduced balance demands<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The optimal height depends on trunk control, confidence, and skiing goals.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Choose pole length for efficiency \u2014 not just reach<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Pole length has a direct impact on joint loading:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Longer poles increase reach but also shoulder and elbow strain<\/li>\n\n\n\n<li>Slightly shorter poles often improve force efficiency and control<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Efficient force transfer is more important than maximum reach.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Encourage controlled trunk involvement<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Active trunk engagement distributes effort across larger muscle groups and reduces reliance on the arms alone. Research consistently links trunk involvement to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher propulsion efficiency<\/li>\n\n\n\n<li>Reduced arm fatigue<\/li>\n\n\n\n<li>Better endurance over longer sessions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Spike should be configured to allow trunk movement without compromising stability.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. Use supports proactively to reduce energy loss<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">One of the most important findings relates to <strong>support and stability<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Research showed that when an athlete is not sufficiently supported, a large portion of energy is lost to balancing the upper body instead of producing forward motion. Even small feelings of instability can lead to meaningful increases in fatigue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Supports such as backrests, belts, thigh supports, or cushions should therefore be used <strong>as soon as the athlete feels even slightly unbalanced<\/strong> \u2014 not only when instability becomes obvious.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Proper support does not restrict movement. It creates a stable foundation that allows more effective force transfer and longer, more comfortable sessions. This is especially important for athletes with limited trunk control or during longer rides.<\/p>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1600\" height=\"1165\" src=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-4-1-1600x1165.png\" alt=\"\" class=\"wp-image-57102\"\/><figcaption class=\"wp-element-caption\"><em><em>Sit-ski biomechanics Spike model used to simulate movement<\/em><\/em><\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1018\" height=\"752\" src=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1.png\" alt=\"\" class=\"wp-image-57103\" srcset=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1.png 1018w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1-800x591.png 800w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1-768x567.png 768w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1-16x12.png 16w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1-990x731.png 990w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1-441x326.png 441w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1-1000x739.png 1000w, https:\/\/smartgroup.no\/wp-content\/uploads\/Frederique-5-1-150x111.png 150w\" sizes=\"(max-width: 1018px) 100vw, 1018px\" \/><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Learn more: full research article<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This blog post summarizes key findings from Frederique\u2019s internship work.<br>If you would like to explore the topic in more depth, you can read the full research article here:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 <strong><a href=\"https:\/\/smartgroup.no\/wp-content\/uploads\/Biomechanics-in-Sit-skiing-\u2013-Improving-the-Spike-User-Experience.pdf\">[Link to Frederique Faasen\u2019s full article]<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What this means for Spike users<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Spike is designed to be <strong>highly adjustable<\/strong>, because no two athletes are the same. With the right setup, users can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improve comfort<\/li>\n\n\n\n<li>Increase efficiency<\/li>\n\n\n\n<li>Reduce fatigue<\/li>\n\n\n\n<li>Extend time on snow<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">By combining research, real-world user feedback, and continuous development, SmartGroup continues to evolve Spike to better support both recreational and performance-oriented sit-skiers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you want to learn more of have any question, please contact us at <a href=\"mailto:post@smartgroup.no\" target=\"_blank\" rel=\"noreferrer noopener\">post@smartgroup.no<\/a> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How Biomechanics, Research, and User Experience Shape Adaptive Sit-Skiing This article explores sit-ski biomechanics of Spike and how research-driven design improves performance, comfort, and fatigue management for Spike users. At SmartGroup, we develop adaptive sports equipment with one clear ambition: to help athletes move more efficiently, comfortably, and confidently, regardless of ability level. One of [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":53753,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27,170],"tags":[],"class_list":["post-57095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innovations","category-spike"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sit-ski biomechanics Spike: Performance and Comfort Explained<\/title>\n<meta name=\"description\" content=\"Learn how sit-ski biomechanics improve performance and comfort with Spike, based on research from a SmartGroup internship.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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