31 Prime Day Fitness Deals Still in Stock, From the Oura Ring to 40% Off Peloton

Nuun Sport Electrolyte Tablets ($21, originally $30)

For runners, cyclists, and hot Pilates fans, electrolytes can be a helpful part of a long workout, especially in the heat. These tablets dissolve quickly in water and contain less than one gram of sugar. They're also non-GMO, gluten-free, and vegan with added magnesium. The Citrus Berry Twist flavor is on sale now, making it a good time to give them a try.