{"id":71,"date":"2026-09-03T01:21:00","date_gmt":"2026-09-03T01:21:00","guid":{"rendered":"https:\/\/pulsar.ispazio.net\/default\/2026\/09\/03\/field-notes-a-week-with-the-new-fitness-trackers\/"},"modified":"2026-09-03T01:21:00","modified_gmt":"2026-09-03T01:21:00","slug":"field-notes-a-week-with-the-new-fitness-trackers","status":"publish","type":"post","link":"https:\/\/pulsar.ispazio.net\/news\/2026\/09\/03\/field-notes-a-week-with-the-new-fitness-trackers\/","title":{"rendered":"Field Notes: A Week With the New Fitness Trackers"},"content":{"rendered":"\r\n<p class=\"wp-block-paragraph\">We wore all three at once for a week \u2014 two on one wrist, one on the other, swapped daily so no band got the good side. It looked ridiculous and it is the only way to compare them honestly.<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image alignwide size-large\"><a href=\"https:\/\/pulsar.ispazio.net\/default\/wp-content\/uploads\/sites\/2\/2026\/09\/pulsar-demo-25.jpg\" rel=\"noopener\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2261059\" src=\"https:\/\/pulsar.ispazio.net\/default\/wp-content\/uploads\/sites\/2\/2026\/09\/pulsar-demo-25.jpg\" alt=\"\" width=\"800\" height=\"533\" \/><\/a>\r\n<figcaption class=\"wp-element-caption\">Seven days, three bands, one very tired wrist.<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">What we were actually testing<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Step counts agree within a few per cent on every band made in the last five years. The interesting differences are elsewhere:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><strong>Heart rate under load<\/strong> \u2014 where cheap optical sensors fall apart.<\/li>\r\n<li><strong>Sleep staging<\/strong> \u2014 where every manufacturer claims more precision than the hardware can deliver.<\/li>\r\n<li><strong>Battery under real use<\/strong> \u2014 with the screen on, notifications on, and the always-on display exactly as most people leave it.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\">\r\n<thead>\r\n<tr>\r\n<th>\u00a0<\/th>\r\n<th>Band A<\/th>\r\n<th>Band B<\/th>\r\n<th>Band C<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>Heart rate, steady<\/td>\r\n<td>Good<\/td>\r\n<td>Good<\/td>\r\n<td>Good<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Heart rate, intervals<\/td>\r\n<td>Good<\/td>\r\n<td>Poor<\/td>\r\n<td>Fair<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Sleep vs. reference<\/td>\r\n<td>\u00b119 min<\/td>\r\n<td>\u00b141 min<\/td>\r\n<td>\u00b126 min<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Battery, as shipped<\/td>\r\n<td>6 days<\/td>\r\n<td>2 days<\/td>\r\n<td>9 days<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Battery, always-on<\/td>\r\n<td>3 days<\/td>\r\n<td>1 day<\/td>\r\n<td>4 days<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<figcaption class=\"wp-element-caption\">Reference for sleep was a chest strap plus a manual log. Not a laboratory, but the same reference for all three.<\/figcaption>\r\n<\/figure>\r\n\r\n\r\n\r\n<figure class=\"wp-block-pullquote\">\r\n<blockquote>\r\n<p>A sleep score you do not trust is worse than no sleep score at all: it makes you doubt a good night.<\/p>\r\n<\/blockquote>\r\n<\/figure>\r\n\r\n\r\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/pulsar.ispazio.net\/default\/wp-content\/uploads\/sites\/2\/2026\/09\/pulsar-demo-49.jpg\" rel=\"noopener\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" data-id=\"2261092\" src=\"https:\/\/pulsar.ispazio.net\/default\/wp-content\/uploads\/sites\/2\/2026\/09\/pulsar-demo-49.jpg\" alt=\"\" class=\"wp-image-2261092\" width=\"800\" height=\"529\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/pulsar.ispazio.net\/default\/wp-content\/uploads\/sites\/2\/2026\/09\/pulsar-demo-24.jpg\" rel=\"noopener\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" data-id=\"2261064\" src=\"https:\/\/pulsar.ispazio.net\/default\/wp-content\/uploads\/sites\/2\/2026\/09\/pulsar-demo-24.jpg\" alt=\"\" class=\"wp-image-2261064\" width=\"800\" height=\"508\" \/><\/a><\/figure>\n\n\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">Left: the always-on display that costs half the battery. Right: the band that lasted the week.<\/figcaption><\/figure>\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">The one we kept wearing<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Band C, and not because it won the most rows. It won the row that decides whether a tracker is on your wrist in month three, which is battery life. The band you charge twice a week is the band you eventually leave in a drawer.<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-group has-very-light-gray-background-color has-background\">\r\n<div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\r\n<p class=\"wp-block-paragraph\"><strong>Two numbers that matter, and one that does not<\/strong><\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><strong>Resting heart rate over weeks.<\/strong> Slow, boring, genuinely useful.<\/li>\r\n<li><strong>Time asleep.<\/strong> Not the stages \u2014 the total.<\/li>\r\n<li><strong>The daily readiness score.<\/strong> Invented, unfalsifiable, and it will happily tell you that you feel bad on a day you feel fine.<\/li>\r\n<\/ul>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n<aside class=\"pls-appcard\"><div class=\"pls-appcard__icon\"><img src=\"https:\/\/is1-ssl.mzstatic.com\/image\/thumb\/Purple221\/v4\/f2\/c2\/86\/f2c286be-40c2-a9ff-af91-8809aecf764c\/Wallpapers_Central_IconComposer-0-0-1x_U007epad-0-1-0-sRGB-85-220.png\/100x100bb.jpg\" loading=\"lazy\" decoding=\"async\" alt=\"\" width=\"72\" height=\"72\"><\/div><div class=\"pls-appcard__body\"><h3 class=\"pls-appcard__name\">Wallpapers Central<\/h3><div class=\"pls-appcard__dev\">iSpazio S.r.l.<\/div><\/div><div class=\"pls-appcard__cta\"><a class=\"pls-appcard__btn\" href=\"https:\/\/apps.apple.com\/us\/app\/wallpapers-central\/id1527983896?uo=4\" target=\"_blank\" rel=\"noopener nofollow\">Free<\/a><\/div><\/aside>\n\r\n\r\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\r\n<summary>Why not test the phone apps too?<\/summary>\r\n\r\n<p class=\"wp-block-paragraph\">Because the phone in a pocket and a band on a wrist are measuring different things, and comparing them tells you about trouser pockets rather than about sensors. Worth doing \u2014 in its own article.<\/p>\r\n<\/details>\r\n\r\n<hr class=\"wp-block-separator is-style-dots\" \/>\r\n\r\n\r\n<p class=\"has-small-font-size wp-block-paragraph\"><em>All three bands were bought at retail. None of the manufacturers saw this article before publication.<\/em><\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Three bands, seven days, and the only two numbers that turned out to matter.<\/p>\n","protected":false},"author":1,"featured_media":70,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53,8],"tags":[54,21,55,56],"class_list":["post-71","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health","category-reviews","tag-fitness","tag-review","tag-sleep","tag-wearables"],"comment_count":2,"author_name":"Fabiano Confuorto","author_avatar_url":"https:\/\/pulsar.ispazio.net\/news\/wp-content\/uploads\/sites\/2\/2026\/09\/ea384402b159db230514f08d0a2a08c621e459edbd096d9df6bab6b29cf46f5a-150x150.jpg","_links":{"self":[{"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/posts\/71","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/comments?post=71"}],"version-history":[{"count":0,"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/posts\/71\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/media\/70"}],"wp:attachment":[{"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/media?parent=71"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/categories?post=71"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pulsar.ispazio.net\/news\/wp-json\/wp\/v2\/tags?post=71"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}