Illustration: Pedro Nekoi It’s the first day of summer, which also means it’s a good time to get outside — and to invest in a fitness watch to track your activities. Thankfully, this Prime

Day you won’t need to make as much of an investment as usual, because Garmin’s Vivoactive 4S GPS Smartwatch — the same one Strategist senior writer (and long-distance runner) Karen Adelson

uses every day — is almost 50 percent off. In her review of the watch, Adelson writes that “along with excelling at what every other fitness tracker in its category can do (tracking steps,

stairs climbed, sleep, heart rate, and, like the new Apple Watch, pulse oximetry), the Vivoactive can be almost endlessly customized. You can change up all the display screens to get the

runner,” because if she’s shooting to maintain a specific pace or heart rate during the workout, she can “see that on the watch in real time … and also take advantage of the watch’s Body

Battery score to know when I can really push myself.” Originally priced at $350, for today only, it’s discounted to just $190 — the cheapest it’s ever been. For a cheaper (but still

expert-recommended) option, Garmin’s entry-level running watch, the Forerunner 45S, is also on sale today. Running coach Jonathan Cane told us it would “certainly do the trick for a new

runner, and will be adequate even for a more hard-core athlete.” _The Strategist__ is designed to surface the most useful, expert recommendations for things to buy across the vast e-commerce

landscape. Some of our latest conquests include the best __acne treatments__, __rolling luggage__, __pillows for side sleepers__, __natural anxiety remedies__, and __bath towels__. We

update links when possible, but note that deals can expire and all prices are subject to change._